5226e9082d
Signed-off-by: Piotr Pelplinski <piotr.pelplinski@intel.com> Change-Id: I23e14bd1568dade96e5503598a3e360c951d6d78 Reviewed-on: https://review.gerrithub.io/369250 Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
29 lines
1.1 KiB
Markdown
29 lines
1.1 KiB
Markdown
# Logical volume store {#lvolstore}
|
|
|
|
A logical volume store is an SPDK blobstore with a special super blob denoting the blobstore.
|
|
This super blob is to different from SPDK blobstores used for BlobFS.
|
|
|
|
# Logical volume {#lvol}
|
|
|
|
A logical volume is an SPDK blob created from an lvolstore.
|
|
|
|
An lvol is uniquely identified by its blob ID and the UUID of the lvolstore from which it was created.
|
|
|
|
# Logical volume block device {#vdev_lvol}
|
|
|
|
Representation of an SPDK block device (spdk_bdev) with an lvol implementation. A logical volume block device translates generic SPDK block device I/O (spdk_bdev_io) operations into the equivalent SPDK blob operations.
|
|
|
|
# RPC overview
|
|
There are few logical volumes specific calls.
|
|
|
|
- construct_lvol_store bdev_name
|
|
Constructs lvolstore on specified bdev
|
|
- destroy_lvol_store bdev_name
|
|
Destroy lvolstore on specified bdev
|
|
- construct_lvol_bdev uuid size
|
|
Constructs lvol bdev on lvolstore specified by uuid with specified size
|
|
- resize_lvol_bdev bdev_name size
|
|
Resizes specified lvol bdev
|
|
|
|
Note that destroying lvol store requires using call destroy_lvol_store, while deleting single lvol requires using delete_bdev rpc call.
|