feat: propagate max_concurrent_requests to queue state entries instead of hardcoded 128 in backend/v2

backends/client/src/v2/pb/generate.v2.rs

@@ -0,0 +1,647 @@
+// This file is @generated by prost-build.
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct HealthRequest {}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct HealthResponse {}
+/// / Empty request
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct InfoRequest {}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct InfoResponse {
+    #[prost(bool, tag = "1")]
+    pub requires_padding: bool,
+    #[prost(string, tag = "2")]
+    pub dtype: ::prost::alloc::string::String,
+    #[prost(string, tag = "3")]
+    pub device_type: ::prost::alloc::string::String,
+    #[prost(uint32, optional, tag = "4")]
+    pub window_size: ::core::option::Option<u32>,
+    #[prost(uint32, tag = "5")]
+    pub speculate: u32,
+}
+/// / Empty request
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ServiceDiscoveryRequest {}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ServiceDiscoveryResponse {
+    /// / Other shards urls
+    #[prost(string, repeated, tag = "1")]
+    pub urls: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ClearCacheRequest {
+    /// / Optional batch id
+    #[prost(uint64, optional, tag = "1")]
+    pub id: ::core::option::Option<u64>,
+}
+/// / Empty response
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ClearCacheResponse {}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct NextTokenChooserParameters {
+    /// / exponential scaling output probability distribution
+    #[prost(float, tag = "1")]
+    pub temperature: f32,
+    /// / restricting to the k highest probability elements
+    #[prost(uint32, tag = "2")]
+    pub top_k: u32,
+    /// / restricting to top tokens summing to prob_cut_off <= prob_cut_off
+    #[prost(float, tag = "3")]
+    pub top_p: f32,
+    /// / restricting to top tokens summing to prob_cut_off <= prob_cut_off
+    #[prost(float, tag = "4")]
+    pub typical_p: f32,
+    /// / apply sampling on the logits
+    #[prost(bool, tag = "5")]
+    pub do_sample: bool,
+    /// / random seed for sampling
+    #[prost(uint64, tag = "6")]
+    pub seed: u64,
+    /// / repetition penalty
+    #[prost(float, tag = "7")]
+    pub repetition_penalty: f32,
+    /// / frequency penalty
+    #[prost(float, tag = "9")]
+    pub frequency_penalty: f32,
+    /// / token watermarking using "A Watermark for Large Language Models"
+    #[prost(bool, tag = "8")]
+    pub watermark: bool,
+    /// / grammar (applied if not empty)
+    #[prost(string, tag = "10")]
+    pub grammar: ::prost::alloc::string::String,
+    /// / grammar type
+    #[prost(enumeration = "GrammarType", tag = "11")]
+    pub grammar_type: i32,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct StoppingCriteriaParameters {
+    /// / Maximum number of generated tokens
+    #[prost(uint32, tag = "1")]
+    pub max_new_tokens: u32,
+    /// / Optional stopping sequences
+    #[prost(string, repeated, tag = "2")]
+    pub stop_sequences: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
+    /// / Ignore end of sequence token
+    /// / used for benchmarking
+    #[prost(bool, tag = "3")]
+    pub ignore_eos_token: bool,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Request {
+    /// / Request ID
+    #[prost(uint64, tag = "1")]
+    pub id: u64,
+    /// / The generation context
+    #[prost(string, tag = "2")]
+    pub inputs: ::prost::alloc::string::String,
+    /// / Context truncation
+    #[prost(uint32, tag = "3")]
+    pub truncate: u32,
+    /// / Next Token Chooser Parameters
+    #[prost(message, optional, tag = "4")]
+    pub parameters: ::core::option::Option<NextTokenChooserParameters>,
+    /// / Stopping Criteria Parameters
+    #[prost(message, optional, tag = "5")]
+    pub stopping_parameters: ::core::option::Option<StoppingCriteriaParameters>,
+    /// / Return prefill logprobs
+    #[prost(bool, tag = "6")]
+    pub prefill_logprobs: bool,
+    /// / Return most likely n tokens
+    #[prost(uint32, tag = "7")]
+    pub top_n_tokens: u32,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Batch {
+    /// / Batch ID
+    #[prost(uint64, tag = "1")]
+    pub id: u64,
+    /// / Individual requests
+    #[prost(message, repeated, tag = "2")]
+    pub requests: ::prost::alloc::vec::Vec<Request>,
+    /// / Batch size (==len(requests))
+    #[prost(uint32, tag = "3")]
+    pub size: u32,
+    /// / Maximum number of tokens this batch will grow to
+    #[prost(uint32, tag = "4")]
+    pub max_tokens: u32,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct CachedBatch {
+    /// / Batch ID
+    #[prost(uint64, tag = "1")]
+    pub id: u64,
+    /// / Individual requests ids
+    #[prost(uint64, repeated, tag = "2")]
+    pub request_ids: ::prost::alloc::vec::Vec<u64>,
+    /// / Batch size (==len(requests))
+    #[prost(uint32, tag = "3")]
+    pub size: u32,
+    /// / Maximum number of tokens this batch will grow to
+    #[prost(uint32, tag = "4")]
+    pub max_tokens: u32,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct GeneratedText {
+    /// / Output
+    #[prost(string, tag = "1")]
+    pub text: ::prost::alloc::string::String,
+    /// / Number of generated tokens
+    #[prost(uint32, tag = "2")]
+    pub generated_tokens: u32,
+    /// / Finish reason
+    #[prost(enumeration = "FinishReason", tag = "3")]
+    pub finish_reason: i32,
+    /// / Seed
+    #[prost(uint64, optional, tag = "4")]
+    pub seed: ::core::option::Option<u64>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Tokens {
+    /// / Token IDs
+    #[prost(uint32, repeated, tag = "1")]
+    pub ids: ::prost::alloc::vec::Vec<u32>,
+    /// / Logprobs
+    #[prost(float, repeated, tag = "2")]
+    pub logprobs: ::prost::alloc::vec::Vec<f32>,
+    /// / tokens
+    #[prost(string, repeated, tag = "3")]
+    pub texts: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
+    /// / special
+    #[prost(bool, repeated, tag = "4")]
+    pub is_special: ::prost::alloc::vec::Vec<bool>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Generation {
+    /// / Request ID
+    #[prost(uint64, tag = "1")]
+    pub request_id: u64,
+    /// / Prefill tokens (optional)
+    #[prost(message, optional, tag = "2")]
+    pub prefill_tokens: ::core::option::Option<Tokens>,
+    #[prost(message, optional, tag = "3")]
+    pub tokens: ::core::option::Option<Tokens>,
+    /// / Complete generated text
+    #[prost(message, optional, tag = "4")]
+    pub generated_text: ::core::option::Option<GeneratedText>,
+    /// / Top tokens
+    #[prost(message, repeated, tag = "5")]
+    pub top_tokens: ::prost::alloc::vec::Vec<Tokens>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct FilterBatchRequest {
+    /// / Batch ID
+    #[prost(uint64, tag = "1")]
+    pub batch_id: u64,
+    /// / Requests to keep
+    #[prost(uint64, repeated, tag = "2")]
+    pub request_ids: ::prost::alloc::vec::Vec<u64>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct FilterBatchResponse {
+    /// / Filtered Batch (cached)
+    #[prost(message, optional, tag = "1")]
+    pub batch: ::core::option::Option<CachedBatch>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct PrefillRequest {
+    /// / Batch
+    #[prost(message, optional, tag = "1")]
+    pub batch: ::core::option::Option<Batch>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct PrefillResponse {
+    /// / Generation
+    #[prost(message, repeated, tag = "1")]
+    pub generations: ::prost::alloc::vec::Vec<Generation>,
+    /// / Next batch (cached)
+    #[prost(message, optional, tag = "2")]
+    pub batch: ::core::option::Option<CachedBatch>,
+    /// / Forward elapsed time in nanoseconds
+    #[prost(uint64, tag = "3")]
+    pub forward_ns: u64,
+    /// / Decode elapsed time in nanoseconds
+    #[prost(uint64, tag = "4")]
+    pub decode_ns: u64,
+    /// / Total elapsed time in nanoseconds
+    #[prost(uint64, tag = "5")]
+    pub total_ns: u64,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct DecodeRequest {
+    /// / Cached batches
+    #[prost(message, repeated, tag = "1")]
+    pub batches: ::prost::alloc::vec::Vec<CachedBatch>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct DecodeResponse {
+    /// / Decodes
+    #[prost(message, repeated, tag = "1")]
+    pub generations: ::prost::alloc::vec::Vec<Generation>,
+    /// / Next batch (cached)
+    #[prost(message, optional, tag = "2")]
+    pub batch: ::core::option::Option<CachedBatch>,
+    /// / Forward elapsed time in nanoseconds
+    #[prost(uint64, tag = "3")]
+    pub forward_ns: u64,
+    /// / Decode elapsed time in nanoseconds
+    #[prost(uint64, tag = "4")]
+    pub decode_ns: u64,
+    /// / Total elapsed time in nanoseconds
+    #[prost(uint64, tag = "5")]
+    pub total_ns: u64,
+    /// / Concatenate elapsed time in nanoseconds
+    #[prost(uint64, optional, tag = "6")]
+    pub concat_ns: ::core::option::Option<u64>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct WarmupRequest {
+    /// / Batch to warmup on
+    #[prost(message, optional, tag = "1")]
+    pub batch: ::core::option::Option<Batch>,
+    #[prost(uint32, tag = "2")]
+    pub max_input_length: u32,
+    #[prost(uint32, tag = "3")]
+    pub max_prefill_tokens: u32,
+    #[prost(uint32, tag = "4")]
+    pub max_total_tokens: u32,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct WarmupResponse {
+    /// / Maximum number of tokens supported by the model
+    #[prost(uint32, optional, tag = "1")]
+    pub max_supported_total_tokens: ::core::option::Option<u32>,
+}
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
+#[repr(i32)]
+pub enum GrammarType {
+    None = 0,
+    Json = 1,
+    Regex = 2,
+}
+impl GrammarType {
+    /// String value of the enum field names used in the ProtoBuf definition.
+    ///
+    /// The values are not transformed in any way and thus are considered stable
+    /// (if the ProtoBuf definition does not change) and safe for programmatic use.
+    pub fn as_str_name(&self) -> &'static str {
+        match self {
+            GrammarType::None => "GRAMMAR_TYPE_NONE",
+            GrammarType::Json => "GRAMMAR_TYPE_JSON",
+            GrammarType::Regex => "GRAMMAR_TYPE_REGEX",
+        }
+    }
+    /// Creates an enum from field names used in the ProtoBuf definition.
+    pub fn from_str_name(value: &str) -> ::core::option::Option<Self> {
+        match value {
+            "GRAMMAR_TYPE_NONE" => Some(Self::None),
+            "GRAMMAR_TYPE_JSON" => Some(Self::Json),
+            "GRAMMAR_TYPE_REGEX" => Some(Self::Regex),
+            _ => None,
+        }
+    }
+}
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
+#[repr(i32)]
+pub enum FinishReason {
+    Length = 0,
+    EosToken = 1,
+    StopSequence = 2,
+}
+impl FinishReason {
+    /// String value of the enum field names used in the ProtoBuf definition.
+    ///
+    /// The values are not transformed in any way and thus are considered stable
+    /// (if the ProtoBuf definition does not change) and safe for programmatic use.
+    pub fn as_str_name(&self) -> &'static str {
+        match self {
+            FinishReason::Length => "FINISH_REASON_LENGTH",
+            FinishReason::EosToken => "FINISH_REASON_EOS_TOKEN",
+            FinishReason::StopSequence => "FINISH_REASON_STOP_SEQUENCE",
+        }
+    }
+    /// Creates an enum from field names used in the ProtoBuf definition.
+    pub fn from_str_name(value: &str) -> ::core::option::Option<Self> {
+        match value {
+            "FINISH_REASON_LENGTH" => Some(Self::Length),
+            "FINISH_REASON_EOS_TOKEN" => Some(Self::EosToken),
+            "FINISH_REASON_STOP_SEQUENCE" => Some(Self::StopSequence),
+            _ => None,
+        }
+    }
+}
+/// Generated client implementations.
+pub mod text_generation_service_client {
+    #![allow(unused_variables, dead_code, missing_docs, clippy::let_unit_value)]
+    use tonic::codegen::*;
+    use tonic::codegen::http::Uri;
+    #[derive(Debug, Clone)]
+    pub struct TextGenerationServiceClient<T> {
+        inner: tonic::client::Grpc<T>,
+    }
+    impl TextGenerationServiceClient<tonic::transport::Channel> {
+        /// Attempt to create a new client by connecting to a given endpoint.
+        pub async fn connect<D>(dst: D) -> Result<Self, tonic::transport::Error>
+        where
+            D: TryInto<tonic::transport::Endpoint>,
+            D::Error: Into<StdError>,
+        {
+            let conn = tonic::transport::Endpoint::new(dst)?.connect().await?;
+            Ok(Self::new(conn))
+        }
+    }
+    impl<T> TextGenerationServiceClient<T>
+    where
+        T: tonic::client::GrpcService<tonic::body::BoxBody>,
+        T::Error: Into<StdError>,
+        T::ResponseBody: Body<Data = Bytes> + Send + 'static,
+        <T::ResponseBody as Body>::Error: Into<StdError> + Send,
+    {
+        pub fn new(inner: T) -> Self {
+            let inner = tonic::client::Grpc::new(inner);
+            Self { inner }
+        }
+        pub fn with_origin(inner: T, origin: Uri) -> Self {
+            let inner = tonic::client::Grpc::with_origin(inner, origin);
+            Self { inner }
+        }
+        pub fn with_interceptor<F>(
+            inner: T,
+            interceptor: F,
+        ) -> TextGenerationServiceClient<InterceptedService<T, F>>
+        where
+            F: tonic::service::Interceptor,
+            T::ResponseBody: Default,
+            T: tonic::codegen::Service<
+                http::Request<tonic::body::BoxBody>,
+                Response = http::Response<
+                    <T as tonic::client::GrpcService<tonic::body::BoxBody>>::ResponseBody,
+                >,
+            >,
+            <T as tonic::codegen::Service<
+                http::Request<tonic::body::BoxBody>,
+            >>::Error: Into<StdError> + Send + Sync,
+        {
+            TextGenerationServiceClient::new(InterceptedService::new(inner, interceptor))
+        }
+        /// Compress requests with the given encoding.
+        ///
+        /// This requires the server to support it otherwise it might respond with an
+        /// error.
+        #[must_use]
+        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.send_compressed(encoding);
+            self
+        }
+        /// Enable decompressing responses.
+        #[must_use]
+        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.accept_compressed(encoding);
+            self
+        }
+        /// Limits the maximum size of a decoded message.
+        ///
+        /// Default: `4MB`
+        #[must_use]
+        pub fn max_decoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_decoding_message_size(limit);
+            self
+        }
+        /// Limits the maximum size of an encoded message.
+        ///
+        /// Default: `usize::MAX`
+        #[must_use]
+        pub fn max_encoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_encoding_message_size(limit);
+            self
+        }
+        /// / Model Info
+        pub async fn info(
+            &mut self,
+            request: impl tonic::IntoRequest<super::InfoRequest>,
+        ) -> std::result::Result<tonic::Response<super::InfoResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v2.TextGenerationService/Info",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v2.TextGenerationService", "Info"));
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Service discovery
+        pub async fn service_discovery(
+            &mut self,
+            request: impl tonic::IntoRequest<super::ServiceDiscoveryRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::ServiceDiscoveryResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v2.TextGenerationService/ServiceDiscovery",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(
+                    GrpcMethod::new(
+                        "generate.v2.TextGenerationService",
+                        "ServiceDiscovery",
+                    ),
+                );
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Empties batch cache
+        pub async fn clear_cache(
+            &mut self,
+            request: impl tonic::IntoRequest<super::ClearCacheRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::ClearCacheResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v2.TextGenerationService/ClearCache",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(
+                    GrpcMethod::new("generate.v2.TextGenerationService", "ClearCache"),
+                );
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Remove requests from a cached batch
+        pub async fn filter_batch(
+            &mut self,
+            request: impl tonic::IntoRequest<super::FilterBatchRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::FilterBatchResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v2.TextGenerationService/FilterBatch",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(
+                    GrpcMethod::new("generate.v2.TextGenerationService", "FilterBatch"),
+                );
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Warmup the model and compute max cache size
+        pub async fn warmup(
+            &mut self,
+            request: impl tonic::IntoRequest<super::WarmupRequest>,
+        ) -> std::result::Result<tonic::Response<super::WarmupResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v2.TextGenerationService/Warmup",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v2.TextGenerationService", "Warmup"));
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Prefill batch and decode first token
+        pub async fn prefill(
+            &mut self,
+            request: impl tonic::IntoRequest<super::PrefillRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::PrefillResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v2.TextGenerationService/Prefill",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v2.TextGenerationService", "Prefill"));
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Decode token for a list of prefilled batches
+        pub async fn decode(
+            &mut self,
+            request: impl tonic::IntoRequest<super::DecodeRequest>,
+        ) -> std::result::Result<tonic::Response<super::DecodeResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v2.TextGenerationService/Decode",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v2.TextGenerationService", "Decode"));
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Health check
+        pub async fn health(
+            &mut self,
+            request: impl tonic::IntoRequest<super::HealthRequest>,
+        ) -> std::result::Result<tonic::Response<super::HealthResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v2.TextGenerationService/Health",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v2.TextGenerationService", "Health"));
+            self.inner.unary(req, path, codec).await
+        }
+    }
+}

backends/client/src/v2/pb/mod.rs

@@ -0,0 +1,6 @@
+// This file is @generated by prost-build.
+pub mod generate {
+    pub mod v2 {
+        include!("generate.v2.rs");
+    }
+}

backends/client/src/v3/pb/generate.v3.rs

@@ -0,0 +1,703 @@
+// This file is @generated by prost-build.
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct HealthRequest {}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct HealthResponse {}
+/// / Empty request
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct InfoRequest {}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct InfoResponse {
+    #[prost(bool, tag = "1")]
+    pub requires_padding: bool,
+    #[prost(string, tag = "2")]
+    pub dtype: ::prost::alloc::string::String,
+    #[prost(string, tag = "3")]
+    pub device_type: ::prost::alloc::string::String,
+    #[prost(uint32, optional, tag = "4")]
+    pub window_size: ::core::option::Option<u32>,
+    #[prost(uint32, tag = "5")]
+    pub speculate: u32,
+}
+/// / Empty request
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ServiceDiscoveryRequest {}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ServiceDiscoveryResponse {
+    /// / Other shards urls
+    #[prost(string, repeated, tag = "1")]
+    pub urls: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ClearCacheRequest {
+    /// / Optional batch id
+    #[prost(uint64, optional, tag = "1")]
+    pub id: ::core::option::Option<u64>,
+}
+/// / Empty response
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ClearCacheResponse {}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Image {
+    /// / Binary image data.
+    #[prost(bytes = "vec", tag = "1")]
+    pub data: ::prost::alloc::vec::Vec<u8>,
+    /// / Image MIME type.
+    #[prost(string, tag = "2")]
+    pub mimetype: ::prost::alloc::string::String,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct InputChunk {
+    #[prost(oneof = "input_chunk::Chunk", tags = "1, 2")]
+    pub chunk: ::core::option::Option<input_chunk::Chunk>,
+}
+/// Nested message and enum types in `InputChunk`.
+pub mod input_chunk {
+    #[allow(clippy::derive_partial_eq_without_eq)]
+    #[derive(Clone, PartialEq, ::prost::Oneof)]
+    pub enum Chunk {
+        /// / Plain text data
+        #[prost(string, tag = "1")]
+        Text(::prost::alloc::string::String),
+        /// / Image data
+        #[prost(message, tag = "2")]
+        Image(super::Image),
+    }
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Input {
+    #[prost(message, repeated, tag = "1")]
+    pub chunks: ::prost::alloc::vec::Vec<InputChunk>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct NextTokenChooserParameters {
+    /// / exponential scaling output probability distribution
+    #[prost(float, tag = "1")]
+    pub temperature: f32,
+    /// / restricting to the k highest probability elements
+    #[prost(uint32, tag = "2")]
+    pub top_k: u32,
+    /// / restricting to top tokens summing to prob_cut_off <= prob_cut_off
+    #[prost(float, tag = "3")]
+    pub top_p: f32,
+    /// / restricting to top tokens summing to prob_cut_off <= prob_cut_off
+    #[prost(float, tag = "4")]
+    pub typical_p: f32,
+    /// / apply sampling on the logits
+    #[prost(bool, tag = "5")]
+    pub do_sample: bool,
+    /// / random seed for sampling
+    #[prost(uint64, tag = "6")]
+    pub seed: u64,
+    /// / repetition penalty
+    #[prost(float, tag = "7")]
+    pub repetition_penalty: f32,
+    /// / frequency penalty
+    #[prost(float, tag = "9")]
+    pub frequency_penalty: f32,
+    /// / token watermarking using "A Watermark for Large Language Models"
+    #[prost(bool, tag = "8")]
+    pub watermark: bool,
+    /// / grammar (applied if not empty)
+    #[prost(string, tag = "10")]
+    pub grammar: ::prost::alloc::string::String,
+    /// / grammar type
+    #[prost(enumeration = "GrammarType", tag = "11")]
+    pub grammar_type: i32,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct StoppingCriteriaParameters {
+    /// / Maximum number of generated tokens
+    #[prost(uint32, tag = "1")]
+    pub max_new_tokens: u32,
+    /// / Optional stopping sequences
+    #[prost(string, repeated, tag = "2")]
+    pub stop_sequences: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
+    /// / Ignore end of sequence token
+    /// / used for benchmarking
+    #[prost(bool, tag = "3")]
+    pub ignore_eos_token: bool,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Request {
+    /// / Request ID
+    #[prost(uint64, tag = "1")]
+    pub id: u64,
+    /// / The generation context as chunks
+    #[prost(message, optional, tag = "8")]
+    pub input_chunks: ::core::option::Option<Input>,
+    /// / The generation context, stringified input_chunks
+    #[prost(string, tag = "2")]
+    pub inputs: ::prost::alloc::string::String,
+    /// / Context truncation
+    #[prost(uint32, tag = "3")]
+    pub truncate: u32,
+    /// / Next Token Chooser Parameters
+    #[prost(message, optional, tag = "4")]
+    pub parameters: ::core::option::Option<NextTokenChooserParameters>,
+    /// / Stopping Criteria Parameters
+    #[prost(message, optional, tag = "5")]
+    pub stopping_parameters: ::core::option::Option<StoppingCriteriaParameters>,
+    /// / Return prefill logprobs
+    #[prost(bool, tag = "6")]
+    pub prefill_logprobs: bool,
+    /// / Return most likely n tokens
+    #[prost(uint32, tag = "7")]
+    pub top_n_tokens: u32,
+    /// / Paged attention blocks
+    #[prost(uint32, repeated, tag = "9")]
+    pub blocks: ::prost::alloc::vec::Vec<u32>,
+    /// / Paged attention slots
+    #[prost(uint32, repeated, tag = "10")]
+    pub slots: ::prost::alloc::vec::Vec<u32>,
+    /// / LORA adapter index
+    #[prost(string, optional, tag = "11")]
+    pub adapter_id: ::core::option::Option<::prost::alloc::string::String>,
+    /// / Prefix length that can be retrieved from the KV cache.
+    #[prost(uint32, tag = "12")]
+    pub prefix_len: u32,
+    /// / Context truncation
+    #[prost(bool, tag = "13")]
+    pub add_special_tokens: bool,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Batch {
+    /// / Batch ID
+    #[prost(uint64, tag = "1")]
+    pub id: u64,
+    /// / Individual requests
+    #[prost(message, repeated, tag = "2")]
+    pub requests: ::prost::alloc::vec::Vec<Request>,
+    /// / Batch size (==len(requests))
+    #[prost(uint32, tag = "3")]
+    pub size: u32,
+    /// / Maximum number of tokens this batch will grow to
+    #[prost(uint32, tag = "4")]
+    pub max_tokens: u32,
+    /// / Maximum number of Paged Attention blocks
+    #[prost(uint32, tag = "5")]
+    pub max_blocks: u32,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct CachedBatch {
+    /// / Batch ID
+    #[prost(uint64, tag = "1")]
+    pub id: u64,
+    /// / Individual requests ids
+    #[prost(uint64, repeated, tag = "2")]
+    pub request_ids: ::prost::alloc::vec::Vec<u64>,
+    /// / Batch size (==len(requests))
+    #[prost(uint32, tag = "3")]
+    pub size: u32,
+    /// / Maximum number of tokens this batch will grow to
+    #[prost(uint32, tag = "4")]
+    pub max_tokens: u32,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct GeneratedText {
+    /// / Output
+    #[prost(string, tag = "1")]
+    pub text: ::prost::alloc::string::String,
+    /// / Number of generated tokens
+    #[prost(uint32, tag = "2")]
+    pub generated_tokens: u32,
+    /// / Finish reason
+    #[prost(enumeration = "FinishReason", tag = "3")]
+    pub finish_reason: i32,
+    /// / Seed
+    #[prost(uint64, optional, tag = "4")]
+    pub seed: ::core::option::Option<u64>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Tokens {
+    /// / Token IDs
+    #[prost(uint32, repeated, tag = "1")]
+    pub ids: ::prost::alloc::vec::Vec<u32>,
+    /// / Logprobs
+    #[prost(float, repeated, tag = "2")]
+    pub logprobs: ::prost::alloc::vec::Vec<f32>,
+    /// / tokens
+    #[prost(string, repeated, tag = "3")]
+    pub texts: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
+    /// / special
+    #[prost(bool, repeated, tag = "4")]
+    pub is_special: ::prost::alloc::vec::Vec<bool>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Generation {
+    /// / Request ID
+    #[prost(uint64, tag = "1")]
+    pub request_id: u64,
+    /// / Prefill tokens (optional)
+    #[prost(message, optional, tag = "2")]
+    pub prefill_tokens: ::core::option::Option<Tokens>,
+    #[prost(message, optional, tag = "3")]
+    pub tokens: ::core::option::Option<Tokens>,
+    /// / Complete generated text
+    #[prost(message, optional, tag = "4")]
+    pub generated_text: ::core::option::Option<GeneratedText>,
+    /// / Top tokens
+    #[prost(message, repeated, tag = "5")]
+    pub top_tokens: ::prost::alloc::vec::Vec<Tokens>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct FilterBatchRequest {
+    /// / Batch ID
+    #[prost(uint64, tag = "1")]
+    pub batch_id: u64,
+    /// / Requests to keep
+    #[prost(uint64, repeated, tag = "2")]
+    pub request_ids: ::prost::alloc::vec::Vec<u64>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct FilterBatchResponse {
+    /// / Filtered Batch (cached)
+    #[prost(message, optional, tag = "1")]
+    pub batch: ::core::option::Option<CachedBatch>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct PrefillRequest {
+    /// / Batch
+    #[prost(message, optional, tag = "1")]
+    pub batch: ::core::option::Option<Batch>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct PrefillResponse {
+    /// / Generation
+    #[prost(message, repeated, tag = "1")]
+    pub generations: ::prost::alloc::vec::Vec<Generation>,
+    /// / Next batch (cached)
+    #[prost(message, optional, tag = "2")]
+    pub batch: ::core::option::Option<CachedBatch>,
+    /// / Forward elapsed time in nanoseconds
+    #[prost(uint64, tag = "3")]
+    pub forward_ns: u64,
+    /// / Decode elapsed time in nanoseconds
+    #[prost(uint64, tag = "4")]
+    pub decode_ns: u64,
+    /// / Total elapsed time in nanoseconds
+    #[prost(uint64, tag = "5")]
+    pub total_ns: u64,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct DecodeRequest {
+    /// / Cached batches
+    #[prost(message, repeated, tag = "1")]
+    pub batches: ::prost::alloc::vec::Vec<CachedBatch>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct DecodeResponse {
+    /// / Decodes
+    #[prost(message, repeated, tag = "1")]
+    pub generations: ::prost::alloc::vec::Vec<Generation>,
+    /// / Next batch (cached)
+    #[prost(message, optional, tag = "2")]
+    pub batch: ::core::option::Option<CachedBatch>,
+    /// / Forward elapsed time in nanoseconds
+    #[prost(uint64, tag = "3")]
+    pub forward_ns: u64,
+    /// / Decode elapsed time in nanoseconds
+    #[prost(uint64, tag = "4")]
+    pub decode_ns: u64,
+    /// / Total elapsed time in nanoseconds
+    #[prost(uint64, tag = "5")]
+    pub total_ns: u64,
+    /// / Concatenate elapsed time in nanoseconds
+    #[prost(uint64, optional, tag = "6")]
+    pub concat_ns: ::core::option::Option<u64>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct WarmupRequest {
+    /// / Batch to warmup on
+    #[prost(message, optional, tag = "1")]
+    pub batch: ::core::option::Option<Batch>,
+    #[prost(uint32, tag = "2")]
+    pub max_input_length: u32,
+    #[prost(uint32, tag = "3")]
+    pub max_prefill_tokens: u32,
+    #[prost(uint32, tag = "4")]
+    pub max_total_tokens: u32,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct WarmupResponse {
+    /// / Maximum number of tokens supported by the model
+    #[prost(uint32, optional, tag = "1")]
+    pub max_supported_total_tokens: ::core::option::Option<u32>,
+}
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
+#[repr(i32)]
+pub enum GrammarType {
+    None = 0,
+    Json = 1,
+    Regex = 2,
+}
+impl GrammarType {
+    /// String value of the enum field names used in the ProtoBuf definition.
+    ///
+    /// The values are not transformed in any way and thus are considered stable
+    /// (if the ProtoBuf definition does not change) and safe for programmatic use.
+    pub fn as_str_name(&self) -> &'static str {
+        match self {
+            GrammarType::None => "GRAMMAR_TYPE_NONE",
+            GrammarType::Json => "GRAMMAR_TYPE_JSON",
+            GrammarType::Regex => "GRAMMAR_TYPE_REGEX",
+        }
+    }
+    /// Creates an enum from field names used in the ProtoBuf definition.
+    pub fn from_str_name(value: &str) -> ::core::option::Option<Self> {
+        match value {
+            "GRAMMAR_TYPE_NONE" => Some(Self::None),
+            "GRAMMAR_TYPE_JSON" => Some(Self::Json),
+            "GRAMMAR_TYPE_REGEX" => Some(Self::Regex),
+            _ => None,
+        }
+    }
+}
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
+#[repr(i32)]
+pub enum FinishReason {
+    Length = 0,
+    EosToken = 1,
+    StopSequence = 2,
+}
+impl FinishReason {
+    /// String value of the enum field names used in the ProtoBuf definition.
+    ///
+    /// The values are not transformed in any way and thus are considered stable
+    /// (if the ProtoBuf definition does not change) and safe for programmatic use.
+    pub fn as_str_name(&self) -> &'static str {
+        match self {
+            FinishReason::Length => "FINISH_REASON_LENGTH",
+            FinishReason::EosToken => "FINISH_REASON_EOS_TOKEN",
+            FinishReason::StopSequence => "FINISH_REASON_STOP_SEQUENCE",
+        }
+    }
+    /// Creates an enum from field names used in the ProtoBuf definition.
+    pub fn from_str_name(value: &str) -> ::core::option::Option<Self> {
+        match value {
+            "FINISH_REASON_LENGTH" => Some(Self::Length),
+            "FINISH_REASON_EOS_TOKEN" => Some(Self::EosToken),
+            "FINISH_REASON_STOP_SEQUENCE" => Some(Self::StopSequence),
+            _ => None,
+        }
+    }
+}
+/// Generated client implementations.
+pub mod text_generation_service_client {
+    #![allow(unused_variables, dead_code, missing_docs, clippy::let_unit_value)]
+    use tonic::codegen::*;
+    use tonic::codegen::http::Uri;
+    #[derive(Debug, Clone)]
+    pub struct TextGenerationServiceClient<T> {
+        inner: tonic::client::Grpc<T>,
+    }
+    impl TextGenerationServiceClient<tonic::transport::Channel> {
+        /// Attempt to create a new client by connecting to a given endpoint.
+        pub async fn connect<D>(dst: D) -> Result<Self, tonic::transport::Error>
+        where
+            D: TryInto<tonic::transport::Endpoint>,
+            D::Error: Into<StdError>,
+        {
+            let conn = tonic::transport::Endpoint::new(dst)?.connect().await?;
+            Ok(Self::new(conn))
+        }
+    }
+    impl<T> TextGenerationServiceClient<T>
+    where
+        T: tonic::client::GrpcService<tonic::body::BoxBody>,
+        T::Error: Into<StdError>,
+        T::ResponseBody: Body<Data = Bytes> + Send + 'static,
+        <T::ResponseBody as Body>::Error: Into<StdError> + Send,
+    {
+        pub fn new(inner: T) -> Self {
+            let inner = tonic::client::Grpc::new(inner);
+            Self { inner }
+        }
+        pub fn with_origin(inner: T, origin: Uri) -> Self {
+            let inner = tonic::client::Grpc::with_origin(inner, origin);
+            Self { inner }
+        }
+        pub fn with_interceptor<F>(
+            inner: T,
+            interceptor: F,
+        ) -> TextGenerationServiceClient<InterceptedService<T, F>>
+        where
+            F: tonic::service::Interceptor,
+            T::ResponseBody: Default,
+            T: tonic::codegen::Service<
+                http::Request<tonic::body::BoxBody>,
+                Response = http::Response<
+                    <T as tonic::client::GrpcService<tonic::body::BoxBody>>::ResponseBody,
+                >,
+            >,
+            <T as tonic::codegen::Service<
+                http::Request<tonic::body::BoxBody>,
+            >>::Error: Into<StdError> + Send + Sync,
+        {
+            TextGenerationServiceClient::new(InterceptedService::new(inner, interceptor))
+        }
+        /// Compress requests with the given encoding.
+        ///
+        /// This requires the server to support it otherwise it might respond with an
+        /// error.
+        #[must_use]
+        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.send_compressed(encoding);
+            self
+        }
+        /// Enable decompressing responses.
+        #[must_use]
+        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.accept_compressed(encoding);
+            self
+        }
+        /// Limits the maximum size of a decoded message.
+        ///
+        /// Default: `4MB`
+        #[must_use]
+        pub fn max_decoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_decoding_message_size(limit);
+            self
+        }
+        /// Limits the maximum size of an encoded message.
+        ///
+        /// Default: `usize::MAX`
+        #[must_use]
+        pub fn max_encoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_encoding_message_size(limit);
+            self
+        }
+        /// / Model Info
+        pub async fn info(
+            &mut self,
+            request: impl tonic::IntoRequest<super::InfoRequest>,
+        ) -> std::result::Result<tonic::Response<super::InfoResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v3.TextGenerationService/Info",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v3.TextGenerationService", "Info"));
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Service discovery
+        pub async fn service_discovery(
+            &mut self,
+            request: impl tonic::IntoRequest<super::ServiceDiscoveryRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::ServiceDiscoveryResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v3.TextGenerationService/ServiceDiscovery",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(
+                    GrpcMethod::new(
+                        "generate.v3.TextGenerationService",
+                        "ServiceDiscovery",
+                    ),
+                );
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Empties batch cache
+        pub async fn clear_cache(
+            &mut self,
+            request: impl tonic::IntoRequest<super::ClearCacheRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::ClearCacheResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v3.TextGenerationService/ClearCache",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(
+                    GrpcMethod::new("generate.v3.TextGenerationService", "ClearCache"),
+                );
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Remove requests from a cached batch
+        pub async fn filter_batch(
+            &mut self,
+            request: impl tonic::IntoRequest<super::FilterBatchRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::FilterBatchResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v3.TextGenerationService/FilterBatch",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(
+                    GrpcMethod::new("generate.v3.TextGenerationService", "FilterBatch"),
+                );
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Warmup the model and compute max cache size
+        pub async fn warmup(
+            &mut self,
+            request: impl tonic::IntoRequest<super::WarmupRequest>,
+        ) -> std::result::Result<tonic::Response<super::WarmupResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v3.TextGenerationService/Warmup",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v3.TextGenerationService", "Warmup"));
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Prefill batch and decode first token
+        pub async fn prefill(
+            &mut self,
+            request: impl tonic::IntoRequest<super::PrefillRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::PrefillResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v3.TextGenerationService/Prefill",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v3.TextGenerationService", "Prefill"));
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Decode token for a list of prefilled batches
+        pub async fn decode(
+            &mut self,
+            request: impl tonic::IntoRequest<super::DecodeRequest>,
+        ) -> std::result::Result<tonic::Response<super::DecodeResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v3.TextGenerationService/Decode",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v3.TextGenerationService", "Decode"));
+            self.inner.unary(req, path, codec).await
+        }
+        /// / Health check
+        pub async fn health(
+            &mut self,
+            request: impl tonic::IntoRequest<super::HealthRequest>,
+        ) -> std::result::Result<tonic::Response<super::HealthResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/generate.v3.TextGenerationService/Health",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("generate.v3.TextGenerationService", "Health"));
+            self.inner.unary(req, path, codec).await
+        }
+    }
+}

backends/client/src/v3/pb/mod.rs

@@ -0,0 +1,6 @@
+// This file is @generated by prost-build.
+pub mod generate {
+    pub mod v3 {
+        include!("generate.v3.rs");
+    }
+}

backends/v2/src/backend.rs

@@ -31,6 +31,7 @@ impl BackendV2 {
         max_batch_total_tokens: u32,
         max_waiting_tokens: usize,
         max_batch_size: Option<usize>,
+        max_concurrent_requests: usize,
         requires_padding: bool,
         window_size: Option<u32>,
         speculate: u32,
@@ -48,7 +49,7 @@ impl BackendV2 {
         } else {
             16
         };
-        let queue = Queue::new(requires_padding, block_size, window_size, speculate);
+        let queue = Queue::new(max_concurrent_requests, requires_padding, block_size, window_size, speculate);
         let batching_task_notifier = Arc::new(Notify::new());
 
         // Spawn batching background task that contains all the inference logic

backends/v2/src/lib.rs

@@ -39,6 +39,7 @@ pub async fn connect_backend(
     max_batch_total_tokens: Option<u32>,
     max_waiting_tokens: usize,
     max_batch_size: Option<usize>,
+    max_concurrent_requests: usize,
 ) -> Result<(BackendV2, BackendInfo), V2Error> {
     // Helper function
     let check_max_batch_total_tokens = |max_supported_batch_total_tokens: Option<u32>| {
@@ -116,12 +117,13 @@ pub async fn connect_backend(
         max_batch_total_tokens,
         max_waiting_tokens,
         max_batch_size,
+        max_concurrent_requests,
         shard_info.requires_padding,
         shard_info.window_size,
         shard_info.speculate,
     );
 
-    tracing::info!("Using backend V3");
+    tracing::info!("Using backend V2");
 
     Ok((backend, backend_info))
 }

backends/v2/src/main.rs

@@ -167,6 +167,7 @@ async fn main() -> Result<(), RouterError> {
         max_batch_total_tokens,
         max_waiting_tokens,
         max_batch_size,
+        max_concurrent_requests,
     )
     .await?;
 

backends/v2/src/queue.rs

@@ -39,6 +39,7 @@ pub(crate) struct Queue {
 
 impl Queue {
     pub(crate) fn new(
+        max_concurrent_requests: usize,
         requires_padding: bool,
         block_size: u32,
         window_size: Option<u32>,
@@ -49,6 +50,7 @@ impl Queue {
 
         // Launch background queue task
         tokio::spawn(queue_task(
+            max_concurrent_requests,
             requires_padding,
             block_size,
             window_size,
@@ -99,13 +101,14 @@ impl Queue {
 
 // Background task responsible of the queue state
 async fn queue_task(
+    max_concurrent_requests: usize,
     requires_padding: bool,
     block_size: u32,
     window_size: Option<u32>,
     speculate: u32,
     mut receiver: mpsc::UnboundedReceiver<QueueCommand>,
 ) {
-    let mut state = State::new(requires_padding, block_size, window_size, speculate);
+    let mut state = State::new(max_concurrent_requests, requires_padding, block_size, window_size, speculate);
 
     while let Some(cmd) = receiver.recv().await {
         match cmd {
@@ -157,13 +160,14 @@ struct State {
 
 impl State {
     fn new(
+        max_concurrent_requests: usize,
         requires_padding: bool,
         block_size: u32,
         window_size: Option<u32>,
         speculate: u32,
     ) -> Self {
         Self {
-            entries: VecDeque::with_capacity(128),
+            entries: VecDeque::with_capacity(max_concurrent_requests),
             next_id: 0,
             next_batch_id: 0,
             requires_padding,
@@ -452,7 +456,7 @@ mod tests {
 
     #[test]
     fn test_append() {
-        let mut state = State::new(false, 1, None, 0);
+        let mut state = State::new(128, false, 1, None, 0);
         let (entry, _guard) = default_entry();
 
         assert_eq!(state.next_id, 0);
@@ -468,7 +472,7 @@ mod tests {
 
     #[test]
     fn test_next_batch_empty() {
-        let mut state = State::new(false, 1, None, 0);
+        let mut state = State::new(128, false, 1, None, 0);
 
         assert!(state.next_batch(None, None, 1, 1).is_none());
         assert!(state.next_batch(Some(1), None, 1, 1).is_none());
@@ -476,7 +480,7 @@ mod tests {
 
     #[test]
     fn test_next_batch_min_size() {
-        let mut state = State::new(false, 1, None, 0);
+        let mut state = State::new(128, false, 1, None, 0);
         let (entry1, _guard1) = default_entry();
         let (entry2, _guard2) = default_entry();
         state.append(entry1);
@@ -508,7 +512,7 @@ mod tests {
 
     #[test]
     fn test_next_batch_max_size() {
-        let mut state = State::new(false, 1, None, 0);
+        let mut state = State::new(128, false, 1, None, 0);
         let (entry1, _guard1) = default_entry();
         let (entry2, _guard2) = default_entry();
         state.append(entry1);
@@ -528,7 +532,7 @@ mod tests {
 
     #[test]
     fn test_next_batch_token_budget() {
-        let mut state = State::new(false, 1, None, 0);
+        let mut state = State::new(128, false, 1, None, 0);
         let (entry1, _guard1) = default_entry();
         let (entry2, _guard2) = default_entry();
         state.append(entry1);
@@ -561,14 +565,14 @@ mod tests {
 
     #[tokio::test]
     async fn test_queue_append() {
-        let queue = Queue::new(false, 1, None, 0);
+        let queue = Queue::new(128, false, 1, None, 0);
         let (entry, _guard) = default_entry();
         queue.append(entry);
     }
 
     #[tokio::test]
     async fn test_queue_next_batch_empty() {
-        let queue = Queue::new(false, 1, None, 0);
+        let queue = Queue::new(128, false, 1, None, 0);
 
         assert!(queue.next_batch(None, None, 1, 1).await.is_none());
         assert!(queue.next_batch(Some(1), None, 1, 1).await.is_none());
@@ -576,7 +580,7 @@ mod tests {
 
     #[tokio::test]
     async fn test_queue_next_batch_min_size() {
-        let queue = Queue::new(false, 1, None, 0);
+        let queue = Queue::new(128, false, 1, None, 0);
         let (entry1, _guard1) = default_entry();
         let (entry2, _guard2) = default_entry();
         queue.append(entry1);
@@ -609,7 +613,7 @@ mod tests {
 
     #[tokio::test]
     async fn test_queue_next_batch_max_size() {
-        let queue = Queue::new(false, 1, None, 0);
+        let queue = Queue::new(128, false, 1, None, 0);
         let (entry1, _guard1) = default_entry();
         let (entry2, _guard2) = default_entry();
         queue.append(entry1);
@@ -625,7 +629,7 @@ mod tests {
 
     #[tokio::test]
     async fn test_queue_next_batch_token_budget() {
-        let queue = Queue::new(false, 1, None, 0);
+        let queue = Queue::new(128, false, 1, None, 0);
         let (entry1, _guard1) = default_entry();
         let (entry2, _guard2) = default_entry();
         queue.append(entry1);
@@ -650,7 +654,7 @@ mod tests {
 
     #[tokio::test]
     async fn test_queue_next_batch_token_speculate() {
-        let queue = Queue::new(false, 1, None, 2);
+        let queue = Queue::new(128, false, 1, None, 2);
         let (entry1, _guard1) = default_entry();
         let (entry2, _guard2) = default_entry();
         queue.append(entry1);
@@ -669,7 +673,7 @@ mod tests {
 
     #[tokio::test]
     async fn test_queue_next_batch_dropped_receiver() {
-        let queue = Queue::new(false, 1, None, 0);
+        let queue = Queue::new(128, false, 1, None, 0);
         let (entry, _) = default_entry();
         queue.append(entry);