diff --git a/lib/bdev/ocf/ctx.c b/lib/bdev/ocf/ctx.c
index 52466cd15..7e23cfc30 100644
--- a/lib/bdev/ocf/ctx.c
+++ b/lib/bdev/ocf/ctx.c
@@ -322,53 +322,27 @@ vbdev_ocf_ctx_cleaner_stop(ocf_cleaner_t c)
 	/* TODO [writeback]: implement with writeback mode support */
 }
 
-static int vbdev_ocf_dobj_updater_init(ocf_metadata_updater_t mu)
+static int vbdev_ocf_volume_updater_init(ocf_metadata_updater_t mu)
 {
 	/* TODO [metadata]: implement with persistent metadata support */
 	return 0;
 }
-static void vbdev_ocf_dobj_updater_stop(ocf_metadata_updater_t mu)
+static void vbdev_ocf_volume_updater_stop(ocf_metadata_updater_t mu)
 {
 	/* TODO [metadata]: implement with persistent metadata support */
 }
-static void vbdev_ocf_dobj_updater_kick(ocf_metadata_updater_t mu)
+static void vbdev_ocf_volume_updater_kick(ocf_metadata_updater_t mu)
 {
 	/* TODO [metadata]: implement with persistent metadata support */
 }
 
-static const struct ocf_ctx_ops vbdev_ocf_ctx_ops = {
-	.name = "OCF SPDK",
-
-	.data_alloc = vbdev_ocf_ctx_data_alloc,
-	.data_free = vbdev_ocf_ctx_data_free,
-	.data_mlock = vbdev_ocf_ctx_data_mlock,
-	.data_munlock = vbdev_ocf_ctx_data_munlock,
-	.data_rd = vbdev_ocf_ctx_data_rd,
-	.data_wr = vbdev_ocf_ctx_data_wr,
-	.data_zero = vbdev_ocf_ctx_data_zero,
-	.data_seek = vbdev_ocf_ctx_data_seek,
-	.data_cpy = vbdev_ocf_ctx_data_cpy,
-	.data_secure_erase = vbdev_ocf_ctx_data_secure_erase,
-
-	.queue_init = vbdev_ocf_ctx_queue_init,
-	.queue_kick = vbdev_ocf_ctx_queue_kick,
-	.queue_stop = vbdev_ocf_ctx_queue_stop,
-
-	.cleaner_init = vbdev_ocf_ctx_cleaner_init,
-	.cleaner_stop = vbdev_ocf_ctx_cleaner_stop,
-
-	.metadata_updater_init = vbdev_ocf_dobj_updater_init,
-	.metadata_updater_stop = vbdev_ocf_dobj_updater_stop,
-	.metadata_updater_kick = vbdev_ocf_dobj_updater_kick,
-};
-
 /* This function is main way by which OCF communicates with user
  * We don't want to use SPDK_LOG here because debugging information that is
  * associated with every print message is not helpful in callback that only prints info
  * while the real source is somewhere in OCF code */
 static int
-vbdev_ocf_ctx_log_printf(const struct ocf_logger *logger,
-			 ocf_logger_lvl_t lvl, const char *fmt, va_list args)
+vbdev_ocf_ctx_log_printf(ocf_logger_t logger, ocf_logger_lvl_t lvl,
+			 const char *fmt, va_list args)
 {
 	FILE *lfile = stdout;
 
@@ -383,9 +357,46 @@ vbdev_ocf_ctx_log_printf(const struct ocf_logger *logger,
 	return vfprintf(lfile, fmt, args);
 }
 
-static const struct ocf_logger logger = {
-	.printf = vbdev_ocf_ctx_log_printf,
-	.dump_stack = NULL,
+static const struct ocf_ctx_config vbdev_ocf_ctx_cfg = {
+	.name = "OCF SPDK",
+
+	.ops = {
+		.data = {
+			.alloc = vbdev_ocf_ctx_data_alloc,
+			.free = vbdev_ocf_ctx_data_free,
+			.mlock = vbdev_ocf_ctx_data_mlock,
+			.munlock = vbdev_ocf_ctx_data_munlock,
+			.read = vbdev_ocf_ctx_data_rd,
+			.write = vbdev_ocf_ctx_data_wr,
+			.zero = vbdev_ocf_ctx_data_zero,
+			.seek = vbdev_ocf_ctx_data_seek,
+			.copy = vbdev_ocf_ctx_data_cpy,
+			.secure_erase = vbdev_ocf_ctx_data_secure_erase,
+		},
+
+		.queue = {
+			.init = vbdev_ocf_ctx_queue_init,
+			.kick = vbdev_ocf_ctx_queue_kick,
+			.stop = vbdev_ocf_ctx_queue_stop,
+		},
+
+		.metadata_updater = {
+			.init = vbdev_ocf_volume_updater_init,
+			.stop = vbdev_ocf_volume_updater_stop,
+			.kick = vbdev_ocf_volume_updater_kick,
+		},
+
+		.cleaner = {
+			.init = vbdev_ocf_ctx_cleaner_init,
+			.stop = vbdev_ocf_ctx_cleaner_stop,
+		},
+
+		.logger = {
+			.printf = vbdev_ocf_ctx_log_printf,
+			.dump_stack = NULL,
+		},
+
+	},
 };
 
 int
@@ -393,13 +404,11 @@ vbdev_ocf_ctx_init(void)
 {
 	int ret;
 
-	ret = ocf_ctx_init(&vbdev_ocf_ctx, &vbdev_ocf_ctx_ops);
+	ret = ocf_ctx_init(&vbdev_ocf_ctx, &vbdev_ocf_ctx_cfg);
 	if (ret < 0) {
 		return ret;
 	}
 
-	ocf_ctx_set_logger(vbdev_ocf_ctx, &logger);
-
 	return 0;
 }
 
diff --git a/lib/bdev/ocf/ctx.h b/lib/bdev/ocf/ctx.h
index 23a7b2f7c..aec3eaec0 100644
--- a/lib/bdev/ocf/ctx.h
+++ b/lib/bdev/ocf/ctx.h
@@ -40,7 +40,7 @@ extern ocf_ctx_t vbdev_ocf_ctx;
 
 #define OCF_WRITE_FLUSH 11
 
-#define SPDK_OBJECT 0
+#define SPDK_OBJECT 1
 
 int vbdev_ocf_ctx_init(void);
 void vbdev_ocf_ctx_cleanup(void);
diff --git a/lib/bdev/ocf/env/ocf_env.h b/lib/bdev/ocf/env/ocf_env.h
index 491322ff8..8a5ee078b 100644
--- a/lib/bdev/ocf/env/ocf_env.h
+++ b/lib/bdev/ocf/env/ocf_env.h
@@ -459,6 +459,26 @@ static inline void env_atomic64_dec(env_atomic64 *a)
 	atomic_dec(a);
 }
 
+static inline int env_atomic64_add_return(int i, env_atomic *a)
+{
+	return __sync_add_and_fetch(a, i);
+}
+
+static inline int env_atomic64_sub_return(int i, env_atomic *a)
+{
+	return __sync_sub_and_fetch(a, i);
+}
+
+static inline int env_atomic64_inc_return(env_atomic *a)
+{
+	return env_atomic64_add_return(1, a);
+}
+
+static inline int env_atomic64_dec_return(env_atomic *a)
+{
+	return env_atomic_sub_return(1, a);
+}
+
 static inline long env_atomic64_cmpxchg(env_atomic64 *a, long old, long new)
 {
 	return atomic_cmpxchg(a, old, new);
@@ -623,6 +643,16 @@ static inline uint64_t env_ticks_to_msecs(uint64_t j)
 	return env_ticks_to_secs(j) * 1000;
 }
 
+static inline uint64_t env_ticks_to_nsecs(uint64_t j)
+{
+	return env_ticks_to_secs(j) * 1000 * 1000;
+}
+
+static inline uint64_t env_ticks_to_usecs(uint64_t j)
+{
+	return env_ticks_to_secs(j) * 1000 * 1000 * 1000;
+}
+
 static inline uint64_t env_secs_to_ticks(uint64_t j)
 {
 	return j * spdk_get_ticks_hz();
diff --git a/lib/bdev/ocf/stats.c b/lib/bdev/ocf/stats.c
index 337adefd0..955df7ced 100644
--- a/lib/bdev/ocf/stats.c
+++ b/lib/bdev/ocf/stats.c
@@ -35,29 +35,28 @@
 #include "stats.h"
 
 int
-vbdev_ocf_stats_get(int cache_id, int core_id, struct vbdev_ocf_stats *stats)
+vbdev_ocf_stats_get(ocf_cache_t cache, ocf_core_id_t core_id, struct vbdev_ocf_stats *stats)
 {
 	int status;
-	struct ocf_stats_core core_stats;
-	ocf_cache_t cache;
 	ocf_core_t core;
 
-	status = ocf_mngt_cache_get(vbdev_ocf_ctx, cache_id, &cache);
+	if (cache == NULL) {
+		assert(false);
+		return -EFAULT;
+	}
+
+	status = ocf_mngt_cache_read_lock(cache);
 	if (status) {
 		return status;
 	}
 
-	status = ocf_core_get(cache, 0, &core);
-	if (status) {
-		return status;
-	}
-
-	status = ocf_core_get_stats(core, &core_stats);
+	status = ocf_core_get(cache, core_id, &core);
 	if (status) {
 		return status;
 	}
 
 	status = ocf_stats_collect_core(core, &stats->usage, &stats->reqs, &stats->blocks, &stats->errors);
+	ocf_mngt_cache_read_unlock(cache);
 	if (status) {
 		return status;
 	}
@@ -101,24 +100,24 @@ vbdev_ocf_stats_write_json(struct spdk_json_write_ctx *w, struct vbdev_ocf_stats
 	spdk_json_write_object_end(w);
 
 	spdk_json_write_named_object_begin(w, "blocks");
-	WJSON_STAT(w, stats, blocks, core_obj_rd, "4KiB blocks");
-	WJSON_STAT(w, stats, blocks, core_obj_wr, "4KiB blocks");
-	WJSON_STAT(w, stats, blocks, core_obj_total, "4KiB blocks");
-	WJSON_STAT(w, stats, blocks, cache_obj_rd, "4KiB blocks");
-	WJSON_STAT(w, stats, blocks, cache_obj_wr, "4KiB blocks");
-	WJSON_STAT(w, stats, blocks, cache_obj_total, "4KiB blocks");
+	WJSON_STAT(w, stats, blocks, core_volume_rd, "4KiB blocks");
+	WJSON_STAT(w, stats, blocks, core_volume_wr, "4KiB blocks");
+	WJSON_STAT(w, stats, blocks, core_volume_total, "4KiB blocks");
+	WJSON_STAT(w, stats, blocks, cache_volume_rd, "4KiB blocks");
+	WJSON_STAT(w, stats, blocks, cache_volume_wr, "4KiB blocks");
+	WJSON_STAT(w, stats, blocks, cache_volume_total, "4KiB blocks");
 	WJSON_STAT(w, stats, blocks, volume_rd, "4KiB blocks");
 	WJSON_STAT(w, stats, blocks, volume_wr, "4KiB blocks");
 	WJSON_STAT(w, stats, blocks, volume_total, "4KiB blocks");
 	spdk_json_write_object_end(w);
 
 	spdk_json_write_named_object_begin(w, "errors");
-	WJSON_STAT(w, stats, errors, core_obj_rd, "Requests");
-	WJSON_STAT(w, stats, errors, core_obj_wr, "Requests");
-	WJSON_STAT(w, stats, errors, core_obj_total, "Requests");
-	WJSON_STAT(w, stats, errors, cache_obj_rd, "Requests");
-	WJSON_STAT(w, stats, errors, cache_obj_wr, "Requests");
-	WJSON_STAT(w, stats, errors, cache_obj_total, "Requests");
+	WJSON_STAT(w, stats, errors, core_volume_rd, "Requests");
+	WJSON_STAT(w, stats, errors, core_volume_wr, "Requests");
+	WJSON_STAT(w, stats, errors, core_volume_total, "Requests");
+	WJSON_STAT(w, stats, errors, cache_volume_rd, "Requests");
+	WJSON_STAT(w, stats, errors, cache_volume_wr, "Requests");
+	WJSON_STAT(w, stats, errors, cache_volume_total, "Requests");
 	WJSON_STAT(w, stats, errors, total, "Requests");
 	spdk_json_write_object_end(w);
 
diff --git a/lib/bdev/ocf/stats.h b/lib/bdev/ocf/stats.h
index e63bfe913..f7bf8c448 100644
--- a/lib/bdev/ocf/stats.h
+++ b/lib/bdev/ocf/stats.h
@@ -44,7 +44,7 @@ struct vbdev_ocf_stats {
 	struct ocf_stats_errors errors;
 };
 
-int vbdev_ocf_stats_get(int cache_id, int core_id, struct vbdev_ocf_stats *stats);
+int vbdev_ocf_stats_get(ocf_cache_t cache, ocf_core_id_t core_id, struct vbdev_ocf_stats *stats);
 
 void vbdev_ocf_stats_write_json(struct spdk_json_write_ctx *w, struct vbdev_ocf_stats *stats);
 
diff --git a/lib/bdev/ocf/vbdev_ocf.c b/lib/bdev/ocf/vbdev_ocf.c
index 380b21398..694172f63 100644
--- a/lib/bdev/ocf/vbdev_ocf.c
+++ b/lib/bdev/ocf/vbdev_ocf.c
@@ -37,7 +37,7 @@
 
 #include "ctx.h"
 #include "data.h"
-#include "dobj.h"
+#include "volume.h"
 #include "utils.h"
 #include "vbdev_ocf.h"
 
@@ -92,11 +92,17 @@ stop_vbdev(struct vbdev_ocf *vbdev)
 		return -EINVAL;
 	}
 
+	rc = ocf_mngt_cache_lock(vbdev->ocf_cache);
+	if (rc) {
+		return rc;
+	}
+
 	/* This function blocks execution until all OCF requests are finished
 	 * But we don't have to worry about possible deadlocks because in
 	 * supported modes (WT and PT) all OCF requests are finished before
 	 * SPDK bdev io requests */
 	rc = ocf_mngt_cache_stop(vbdev->ocf_cache);
+	ocf_mngt_cache_unlock(vbdev->ocf_cache);
 	if (rc) {
 		SPDK_ERRLOG("Could not stop cache for '%s'\n", vbdev->name);
 		return rc;
@@ -109,6 +115,7 @@ stop_vbdev(struct vbdev_ocf *vbdev)
 static int
 remove_base(struct vbdev_ocf_base *base)
 {
+	ocf_core_t core;
 	int rc = 0;
 
 	if (base == NULL) {
@@ -122,10 +129,20 @@ remove_base(struct vbdev_ocf_base *base)
 		if (base->is_cache) {
 			rc = stop_vbdev(base->parent);
 		} else {
-			rc = ocf_mngt_cache_remove_core(base->parent->ocf_cache, base->id, false);
+			rc = ocf_core_get(base->parent->ocf_cache, base->id, &core);
+			if (rc) {
+				goto close_spdk_dev;
+			}
+			rc = ocf_mngt_cache_lock(base->parent->ocf_cache);
+			if (rc) {
+				goto close_spdk_dev;
+			}
+			rc = ocf_mngt_cache_remove_core(core);
+			ocf_mngt_cache_unlock(base->parent->ocf_cache);
 		}
 	}
 
+close_spdk_dev:
 	/* Release SPDK-part */
 	spdk_bdev_module_release_bdev(base->bdev);
 	spdk_bdev_close(base->desc);
@@ -276,13 +293,16 @@ io_submit_to_ocf(struct spdk_bdev_io *bdev_io, struct ocf_io *io)
 			dir = OCF_WRITE;
 		}
 		ocf_io_configure(io, offset, len, dir, 0, 0);
-		return ocf_submit_io(io);
+		ocf_core_submit_io(io);
+		return 0;
 	case SPDK_BDEV_IO_TYPE_FLUSH:
 		ocf_io_configure(io, offset, len, OCF_WRITE, 0, OCF_WRITE_FLUSH);
-		return ocf_submit_flush(io);
+		ocf_core_submit_flush(io);
+		return 0;
 	case SPDK_BDEV_IO_TYPE_UNMAP:
 		ocf_io_configure(io, offset, len, 0, 0, 0);
-		return ocf_submit_discard(io);
+		ocf_core_submit_discard(io);
+		return 0;
 	case SPDK_BDEV_IO_TYPE_RESET:
 	case SPDK_BDEV_IO_TYPE_WRITE_ZEROES:
 	default:
@@ -301,7 +321,7 @@ io_handle(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io)
 	struct vbdev_ocf_qcxt *qctx = spdk_io_channel_get_ctx(ch);
 	int err;
 
-	io = ocf_new_io(vbdev->ocf_core);
+	io = ocf_core_new_io(vbdev->ocf_core);
 	if (!io) {
 		err = -ENOMEM;
 		goto fail;
@@ -469,6 +489,7 @@ start_cache(struct vbdev_ocf *vbdev)
 	vbdev->cache.id = ocf_cache_get_id(vbdev->ocf_cache);
 
 	rc = ocf_mngt_cache_attach(vbdev->ocf_cache, &vbdev->cfg.device);
+	ocf_mngt_cache_unlock(vbdev->ocf_cache);
 	if (rc) {
 		SPDK_ERRLOG("Failed to attach cache device\n");
 		return rc;
@@ -483,7 +504,13 @@ add_core(struct vbdev_ocf *vbdev)
 {
 	int rc;
 
+	rc = ocf_mngt_cache_lock(vbdev->ocf_cache);
+	if (rc) {
+		return rc;
+	}
+
 	rc = ocf_mngt_cache_add_core(vbdev->ocf_cache, &vbdev->ocf_core, &vbdev->cfg.core);
+	ocf_mngt_cache_unlock(vbdev->ocf_cache);
 	if (rc) {
 		SPDK_ERRLOG("Failed to add core device to cache instance\n");
 		return rc;
@@ -656,7 +683,6 @@ init_vbdev_config(struct vbdev_ocf *vbdev)
 	/* Id 0 means OCF decides the id */
 	cfg->cache.id = 0;
 	cfg->cache.name = vbdev->name;
-	cfg->cache.name_size = strlen(vbdev->name) + 1;
 
 	/* TODO [metadata]: make configurable with persistent
 	 * metadata support */
@@ -683,7 +709,10 @@ init_vbdev_config(struct vbdev_ocf *vbdev)
 	cfg->device.perform_test = false;
 	cfg->device.discard_on_start = false;
 
-	cfg->core.data_obj_type = SPDK_OBJECT;
+	vbdev->cfg.cache.locked = true;
+
+	cfg->core.volume_type = SPDK_OBJECT;
+	cfg->device.volume_type = SPDK_OBJECT;
 
 	cfg->device.uuid.size = strlen(vbdev->cache.name) + 1;
 	cfg->device.uuid.data = vbdev->cache.name;
@@ -702,7 +731,7 @@ init_vbdev(const char *vbdev_name,
 	int rc = 0;
 
 	if (spdk_bdev_get_by_name(vbdev_name) || vbdev_ocf_get_by_name(vbdev_name)) {
-		SPDK_ERRLOG("Device with name '%s' already exists", vbdev_name);
+		SPDK_ERRLOG("Device with name '%s' already exists\n", vbdev_name);
 		return -EPERM;
 	}
 
@@ -748,7 +777,6 @@ init_vbdev(const char *vbdev_name,
 	}
 
 	init_vbdev_config(vbdev);
-
 	TAILQ_INSERT_TAIL(&g_ocf_vbdev_head, vbdev, tailq);
 	return rc;
 
@@ -774,10 +802,10 @@ vbdev_ocf_init(void)
 		return status;
 	}
 
-	status = vbdev_ocf_dobj_init();
+	status = vbdev_ocf_volume_init();
 	if (status) {
 		vbdev_ocf_ctx_cleanup();
-		SPDK_ERRLOG("OCF dobj initialization failed with=%d\n", status);
+		SPDK_ERRLOG("OCF volume initialization failed with=%d\n", status);
 		return status;
 	}
 
@@ -836,7 +864,7 @@ vbdev_ocf_module_fini(void)
 		free_vbdev(vbdev);
 	}
 
-	vbdev_ocf_dobj_cleanup();
+	vbdev_ocf_volume_cleanup();
 	vbdev_ocf_ctx_cleanup();
 }
 
diff --git a/lib/bdev/ocf/vbdev_ocf_rpc.c b/lib/bdev/ocf/vbdev_ocf_rpc.c
index 5ad27be8d..8d1a2922b 100644
--- a/lib/bdev/ocf/vbdev_ocf_rpc.c
+++ b/lib/bdev/ocf/vbdev_ocf_rpc.c
@@ -200,7 +200,7 @@ spdk_rpc_get_ocf_stats(struct spdk_jsonrpc_request *request, const struct spdk_j
 		goto end;
 	}
 
-	status = vbdev_ocf_stats_get(vbdev->cache.id, vbdev->core.id, &stats);
+	status = vbdev_ocf_stats_get(vbdev->ocf_cache, 0, &stats);
 	if (status) {
 		spdk_jsonrpc_send_error_response_fmt(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR,
 						     "Could not get stats: %s",
diff --git a/lib/bdev/ocf/dobj.c b/lib/bdev/ocf/volume.c
similarity index 69%
rename from lib/bdev/ocf/dobj.c
rename to lib/bdev/ocf/volume.c
index 4cd07284b..c685c03ac 100644
--- a/lib/bdev/ocf/dobj.c
+++ b/lib/bdev/ocf/volume.c
@@ -39,34 +39,35 @@
 #include "spdk_internal/log.h"
 
 #include "data.h"
-#include "dobj.h"
+#include "volume.h"
 #include "ctx.h"
 #include "vbdev_ocf.h"
 
 static int
-vbdev_ocf_dobj_open(ocf_data_obj_t obj)
+vbdev_ocf_volume_open(ocf_volume_t volume)
 {
-	struct vbdev_ocf_base *base = vbdev_ocf_get_base_by_name(ocf_data_obj_get_uuid(obj)->data);
+	struct vbdev_ocf_base **priv = ocf_volume_get_priv(volume);
+	struct vbdev_ocf_base *base = vbdev_ocf_get_base_by_name(ocf_volume_get_uuid(volume)->data);
 
 	if (base == NULL) {
 		assert(false);
 		return -EINVAL;
 	}
 
-	ocf_data_obj_set_priv(obj, base);
+	*priv = base;
 
 	return 0;
 }
 
 static void
-vbdev_ocf_dobj_close(ocf_data_obj_t obj)
+vbdev_ocf_volume_close(ocf_volume_t volume)
 {
 }
 
 static uint64_t
-vbdev_ocf_dobj_get_length(ocf_data_obj_t obj)
+vbdev_ocf_volume_get_length(ocf_volume_t volume)
 {
-	struct vbdev_ocf_base *base = ocf_data_obj_get_priv(obj);
+	struct vbdev_ocf_base *base = *((struct vbdev_ocf_base **)ocf_volume_get_priv(volume));
 	uint64_t len;
 
 	len = base->bdev->blocklen * base->bdev->blockcnt;
@@ -75,8 +76,8 @@ vbdev_ocf_dobj_get_length(ocf_data_obj_t obj)
 }
 
 static int
-vbdev_ocf_dobj_io_set_data(struct ocf_io *io, ctx_data_t *data,
-			   uint32_t offset)
+vbdev_ocf_volume_io_set_data(struct ocf_io *io, ctx_data_t *data,
+			     uint32_t offset)
 {
 	struct ocf_io_ctx *io_ctx = ocf_get_io_ctx(io);
 
@@ -91,13 +92,13 @@ vbdev_ocf_dobj_io_set_data(struct ocf_io *io, ctx_data_t *data,
 }
 
 static ctx_data_t *
-vbdev_ocf_dobj_io_get_data(struct ocf_io *io)
+vbdev_ocf_volume_io_get_data(struct ocf_io *io)
 {
 	return ocf_get_io_ctx(io)->data;
 }
 
 static void
-vbdev_ocf_dobj_io_get(struct ocf_io *io)
+vbdev_ocf_volume_io_get(struct ocf_io *io)
 {
 	struct ocf_io_ctx *io_ctx = ocf_get_io_ctx(io);
 
@@ -105,43 +106,13 @@ vbdev_ocf_dobj_io_get(struct ocf_io *io)
 }
 
 static void
-vbdev_ocf_dobj_io_put(struct ocf_io *io)
+vbdev_ocf_volume_io_put(struct ocf_io *io)
 {
 	struct ocf_io_ctx *io_ctx = ocf_get_io_ctx(io);
 
 	if (--io_ctx->ref) {
 		return;
 	}
-
-	ocf_data_obj_del_io(io);
-}
-
-static const struct ocf_io_ops vbdev_ocf_dobj_io_ops = {
-	.set_data = vbdev_ocf_dobj_io_set_data,
-	.get_data = vbdev_ocf_dobj_io_get_data,
-	.get = vbdev_ocf_dobj_io_get,
-	.put = vbdev_ocf_dobj_io_put,
-};
-
-static struct ocf_io *
-vbdev_ocf_dobj_new_io(ocf_data_obj_t obj)
-{
-	struct ocf_io *io;
-	struct ocf_io_ctx *io_ctx;
-
-	io = ocf_data_obj_new_io(obj);
-	if (io == NULL) {
-		return NULL;
-	}
-
-	io->ops = &vbdev_ocf_dobj_io_ops;
-
-	io_ctx = ocf_get_io_ctx(io);
-	io_ctx->rq_cnt = 0;
-	io_ctx->ref = 1;
-	io_ctx->error = 0;
-
-	return io;
 }
 
 static int
@@ -187,7 +158,7 @@ initialize_cpy_vector(struct iovec *cpy_vec, int cpy_vec_len, struct iovec *orig
 }
 
 static void
-vbdev_ocf_dobj_submit_io_cb(struct spdk_bdev_io *bdev_io, bool success, void *opaque)
+vbdev_ocf_volume_submit_io_cb(struct spdk_bdev_io *bdev_io, bool success, void *opaque)
 {
 	struct ocf_io *io;
 	struct ocf_io_ctx *io_ctx;
@@ -216,7 +187,7 @@ vbdev_ocf_dobj_submit_io_cb(struct spdk_bdev_io *bdev_io, bool success, void *op
 	}
 
 	if (io_ctx->error) {
-		SPDK_DEBUGLOG(SPDK_TRACE_VBDEV_OCF_DOBJ,
+		SPDK_DEBUGLOG(SPDK_TRACE_VBDEV_OCF_VOLUME,
 			      "base returned error on io submission: %d\n", io_ctx->error);
 	}
 
@@ -224,7 +195,7 @@ vbdev_ocf_dobj_submit_io_cb(struct spdk_bdev_io *bdev_io, bool success, void *op
 		spdk_put_io_channel(io_ctx->ch);
 	}
 
-	vbdev_ocf_dobj_io_put(io);
+	vbdev_ocf_volume_io_put(io);
 	if (bdev_io) {
 		spdk_bdev_free_io(bdev_io);
 	}
@@ -248,8 +219,8 @@ prepare_submit(struct ocf_io *io)
 		return 0;
 	}
 
-	vbdev_ocf_dobj_io_get(io);
-	base = ocf_data_obj_get_priv(io->obj);
+	vbdev_ocf_volume_io_get(io);
+	base = *((struct vbdev_ocf_base **)ocf_volume_get_priv(io->volume));
 
 	if (io->io_queue == 0) {
 		/* In SPDK we never set queue id to 0
@@ -281,9 +252,9 @@ prepare_submit(struct ocf_io *io)
 }
 
 static void
-vbdev_ocf_dobj_submit_flush(struct ocf_io *io)
+vbdev_ocf_volume_submit_flush(struct ocf_io *io)
 {
-	struct vbdev_ocf_base *base = ocf_data_obj_get_priv(io->obj);
+	struct vbdev_ocf_base *base = *((struct vbdev_ocf_base **)ocf_volume_get_priv(io->volume));
 	struct ocf_io_ctx *io_ctx = ocf_get_io_ctx(io);
 	int status;
 
@@ -295,39 +266,39 @@ vbdev_ocf_dobj_submit_flush(struct ocf_io *io)
 	status = prepare_submit(io);
 	if (status) {
 		SPDK_ERRLOG("Preparing io failed with status=%d\n", status);
-		vbdev_ocf_dobj_submit_io_cb(NULL, false, io);
+		vbdev_ocf_volume_submit_io_cb(NULL, false, io);
 		return;
 	}
 
 	status = spdk_bdev_flush(
 			 base->desc, io_ctx->ch,
 			 io->addr, io->bytes,
-			 vbdev_ocf_dobj_submit_io_cb, io);
+			 vbdev_ocf_volume_submit_io_cb, io);
 	if (status) {
 		/* Since callback is not called, we need to do it manually to free io structures */
 		SPDK_ERRLOG("Submission failed with status=%d\n", status);
-		vbdev_ocf_dobj_submit_io_cb(NULL, false, io);
+		vbdev_ocf_volume_submit_io_cb(NULL, false, io);
 	}
 }
 
 static void
-vbdev_ocf_dobj_submit_io(struct ocf_io *io)
+vbdev_ocf_volume_submit_io(struct ocf_io *io)
 {
-	struct vbdev_ocf_base *base = ocf_data_obj_get_priv(io->obj);
+	struct vbdev_ocf_base *base = *((struct vbdev_ocf_base **)ocf_volume_get_priv(io->volume));
 	struct ocf_io_ctx *io_ctx = ocf_get_io_ctx(io);
 	struct iovec *iovs;
 	int iovcnt, status = 0, i, offset;
 	uint64_t addr, len;
 
 	if (io->flags == OCF_WRITE_FLUSH) {
-		vbdev_ocf_dobj_submit_flush(io);
+		vbdev_ocf_volume_submit_flush(io);
 		return;
 	}
 
 	status = prepare_submit(io);
 	if (status) {
 		SPDK_ERRLOG("Preparing io failed with status=%d\n", status);
-		vbdev_ocf_dobj_submit_io_cb(NULL, false, io);
+		vbdev_ocf_volume_submit_io_cb(NULL, false, io);
 		return;
 	}
 
@@ -341,7 +312,7 @@ vbdev_ocf_dobj_submit_io(struct ocf_io *io)
 
 		if (i < 0) {
 			SPDK_ERRLOG("offset bigger than data size\n");
-			vbdev_ocf_dobj_submit_io_cb(NULL, false, io);
+			vbdev_ocf_volume_submit_io_cb(NULL, false, io);
 			return;
 		}
 
@@ -351,7 +322,7 @@ vbdev_ocf_dobj_submit_io(struct ocf_io *io)
 
 		if (!iovs) {
 			SPDK_ERRLOG("allocation failed\n");
-			vbdev_ocf_dobj_submit_io_cb(NULL, false, io);
+			vbdev_ocf_volume_submit_io_cb(NULL, false, io);
 			return;
 		}
 
@@ -364,10 +335,10 @@ vbdev_ocf_dobj_submit_io(struct ocf_io *io)
 
 	if (io->dir == OCF_READ) {
 		status = spdk_bdev_readv(base->desc, io_ctx->ch,
-					 iovs, iovcnt, addr, len, vbdev_ocf_dobj_submit_io_cb, io);
+					 iovs, iovcnt, addr, len, vbdev_ocf_volume_submit_io_cb, io);
 	} else if (io->dir == OCF_WRITE) {
 		status = spdk_bdev_writev(base->desc, io_ctx->ch,
-					  iovs, iovcnt, addr, len, vbdev_ocf_dobj_submit_io_cb, io);
+					  iovs, iovcnt, addr, len, vbdev_ocf_volume_submit_io_cb, io);
 	}
 
 	if (status) {
@@ -375,76 +346,80 @@ vbdev_ocf_dobj_submit_io(struct ocf_io *io)
 
 		/* Since callback is not called, we need to do it manually to free io structures */
 		SPDK_ERRLOG("submission failed with status=%d\n", status);
-		vbdev_ocf_dobj_submit_io_cb(NULL, false, io);
+		vbdev_ocf_volume_submit_io_cb(NULL, false, io);
 	}
 }
 
 static void
-vbdev_ocf_dobj_submit_discard(struct ocf_io *io)
+vbdev_ocf_volume_submit_discard(struct ocf_io *io)
 {
-	struct vbdev_ocf_base *base = ocf_data_obj_get_priv(io->obj);
+	struct vbdev_ocf_base *base = *((struct vbdev_ocf_base **)ocf_volume_get_priv(io->volume));
 	struct ocf_io_ctx *io_ctx = ocf_get_io_ctx(io);
 	int status = 0;
 
 	status = prepare_submit(io);
 	if (status) {
 		SPDK_ERRLOG("Preparing io failed with status=%d\n", status);
-		vbdev_ocf_dobj_submit_io_cb(NULL, false, io);
+		vbdev_ocf_volume_submit_io_cb(NULL, false, io);
 		return;
 	}
 
 	status = spdk_bdev_unmap(
 			 base->desc, io_ctx->ch,
 			 io->addr, io->bytes,
-			 vbdev_ocf_dobj_submit_io_cb, io);
+			 vbdev_ocf_volume_submit_io_cb, io);
 	if (status) {
 		/* Since callback is not called, we need to do it manually to free io structures */
 		SPDK_ERRLOG("Submission failed with status=%d\n", status);
-		vbdev_ocf_dobj_submit_io_cb(NULL, false, io);
+		vbdev_ocf_volume_submit_io_cb(NULL, false, io);
 	}
 }
 
 static void
-vbdev_ocf_dobj_submit_metadata(struct ocf_io *io)
+vbdev_ocf_volume_submit_metadata(struct ocf_io *io)
 {
 	/* Implement with persistent metadata support */
 }
 
 static unsigned int
-vbdev_ocf_dobj_get_max_io_size(ocf_data_obj_t obj)
+vbdev_ocf_volume_get_max_io_size(ocf_volume_t volume)
 {
-	return 256;
+	return 131072;
 }
 
-static struct ocf_data_obj_properties vbdev_ocf_dobj_props = {
+static struct ocf_volume_properties vbdev_volume_props = {
 	.name = "SPDK block device",
-	.io_context_size = sizeof(struct ocf_io_ctx),
+	.io_priv_size = sizeof(struct ocf_io_ctx),
+	.volume_priv_size = sizeof(struct vbdev_ocf_base *),
 	.caps = {
 		.atomic_writes = 0 /* to enable need to have ops->submit_metadata */
 	},
 	.ops = {
-		.new_io = vbdev_ocf_dobj_new_io,
-		.open = vbdev_ocf_dobj_open,
-		.close = vbdev_ocf_dobj_close,
-		.get_length = vbdev_ocf_dobj_get_length,
-		.submit_io = vbdev_ocf_dobj_submit_io,
-		.submit_discard = vbdev_ocf_dobj_submit_discard,
-		.submit_flush = vbdev_ocf_dobj_submit_flush,
-		.get_max_io_size = vbdev_ocf_dobj_get_max_io_size,
-		.submit_metadata = vbdev_ocf_dobj_submit_metadata,
-	}
+		.open = vbdev_ocf_volume_open,
+		.close = vbdev_ocf_volume_close,
+		.get_length = vbdev_ocf_volume_get_length,
+		.submit_io = vbdev_ocf_volume_submit_io,
+		.submit_discard = vbdev_ocf_volume_submit_discard,
+		.submit_flush = vbdev_ocf_volume_submit_flush,
+		.get_max_io_size = vbdev_ocf_volume_get_max_io_size,
+		.submit_metadata = vbdev_ocf_volume_submit_metadata,
+	},
+	.io_ops = {
+		.set_data = vbdev_ocf_volume_io_set_data,
+		.get_data = vbdev_ocf_volume_io_get_data,
+	},
 };
 
 int
-vbdev_ocf_dobj_init(void)
+vbdev_ocf_volume_init(void)
 {
-	return ocf_ctx_register_data_obj_type(vbdev_ocf_ctx, SPDK_OBJECT, &vbdev_ocf_dobj_props);
+	return ocf_ctx_register_volume_type(vbdev_ocf_ctx, SPDK_OBJECT, &vbdev_volume_props);
 }
 
 void
-vbdev_ocf_dobj_cleanup(void)
+vbdev_ocf_volume_cleanup(void)
 {
-	ocf_ctx_unregister_data_obj_type(vbdev_ocf_ctx, SPDK_OBJECT);
+	ocf_ctx_unregister_volume_type(vbdev_ocf_ctx, SPDK_OBJECT);
 }
 
-SPDK_LOG_REGISTER_COMPONENT("vbdev_ocf_dobj", SPDK_TRACE_VBDEV_OCF_DOBJ)
+SPDK_LOG_REGISTER_COMPONENT("vbdev_ocf_volume", SPDK_TRACE_VBDEV_OCF_VOLUME)
diff --git a/lib/bdev/ocf/dobj.h b/lib/bdev/ocf/volume.h
similarity index 95%
rename from lib/bdev/ocf/dobj.h
rename to lib/bdev/ocf/volume.h
index c17d6128a..040b11c71 100644
--- a/lib/bdev/ocf/dobj.h
+++ b/lib/bdev/ocf/volume.h
@@ -51,12 +51,12 @@ struct ocf_io_ctx {
 	int error;
 };
 
-int vbdev_ocf_dobj_init(void);
-void vbdev_ocf_dobj_cleanup(void);
+int vbdev_ocf_volume_init(void);
+void vbdev_ocf_volume_cleanup(void);
 
 static inline struct ocf_io_ctx *ocf_get_io_ctx(struct ocf_io *io)
 {
-	return ocf_data_obj_get_data_from_io(io);
+	return ocf_io_get_priv(io);
 }
 
 #endif
diff --git a/ocf b/ocf
index 207449593..276d91fcd 160000
--- a/ocf
+++ b/ocf
@@ -1 +1 @@
-Subproject commit 2074495935888683a94b3915f70630ecb2a25e0d
+Subproject commit 276d91fcd7ca693fe093eb08d801b3c46df50cbf