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RFC 5663, "Parallel NFS (pNFS) Block/Volume Layout", January 2010

Source of RFC: nfsv4 (tsv)

Errata ID: 4141
Status: Held for Document Update
Type: Technical

Reported By: Christoph Hellwig
Date Reported: 2014-10-23
Held for Document Update by: Martin Stiemerling
Date Held: 2016-02-02

Section 2.2.2 says:


It should say:

   The volume size of a PNFS_BLOCK_VOLUME_SIMPLE volume must be obtained
   by the client from the storage subsystem as no size is provided in
   the XDR. All volumes listed in bsv_volumes of a
   struct pnfs_block_stripe_volume_info4 must be the same size.  If
   the size of the volumes listed in a stripe set does not align
   to the bsv_stripe_unit, the last stripe should be treated as
   having a size of volume size modulo the stripe size.
   The volume size of a PNFS_BLOCK_VOLUME_SLICE volume is the sum
   of the volume sizes of each component listed in bsv_volumes.
   The volume size of a PNFS_BLOCK_VOLUME_CONCAT volume is the sum
   of the volume sizes of each component listed in bcv_volumes.

Notes:

RFC5663 provides no explanation of the volume types except for a few sparse comments in the XDR. Explain at least basic size related rules.

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