29 lines
1.1 KiB
Markdown
29 lines
1.1 KiB
Markdown
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# Logical volume store {#lvolstore}
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A logical volume store is an SPDK blobstore with a special super blob denoting the blobstore.
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This super blob is to different from SPDK blobstores used for BlobFS.
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# Logical volume {#lvol}
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A logical volume is an SPDK blob created from an lvolstore.
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An lvol is uniquely identified by its blob ID and the UUID of the lvolstore from which it was created.
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# Logical volume block device {#vdev_lvol}
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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.
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# RPC overview
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There are few logical volumes specific calls.
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- construct_lvol_store bdev_name
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Constructs lvolstore on specified bdev
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- destroy_lvol_store bdev_name
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Destroy lvolstore on specified bdev
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- construct_lvol_bdev uuid size
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Constructs lvol bdev on lvolstore specified by uuid with specified size
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- resize_lvol_bdev bdev_name size
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Resizes specified lvol bdev
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Note that destroying lvol store requires using call destroy_lvol_store, while deleting single lvol requires using delete_bdev rpc call.
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