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| author |   Daniel W. S. Almeida <dwlsalmeida@gmail.com> | 2020-01-10 20:24:30 -0300 |
|---|---|---|
| committer |   Jonathan Corbet <corbet@lwn.net> | 2020-01-16 12:43:05 -0700 |
| commit | 98600b71f2bfc066d5dc8a25abf5fef84f8fc96c (patch) | |
| tree | 02255fdc21e60d09e6eba123a9bcebd858f68e27 /Documentation/admin-guide/nfs | |
| parent | Documentation: nfs: convert pnfs-block-server to ReST (diff) | |
| download | linux-dev-98600b71f2bfc066d5dc8a25abf5fef84f8fc96c.tar.xz linux-dev-98600b71f2bfc066d5dc8a25abf5fef84f8fc96c.zip | |
Documentation: nfs: pnfs-scsi-server: convert to ReST
Convert pnfs-scsi-server to ReST and move it to admin-guide. Content
remains mostly unchanged.
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Link: https://lore.kernel.org/r/5c4b8af41ca0a427a3987535815bccf47a65d320.1578697871.git.dwlsalmeida@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/admin-guide/nfs')
| -rw-r--r-- | Documentation/admin-guide/nfs/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/admin-guide/nfs/pnfs-scsi-server.rst | 24 |
2 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/admin-guide/nfs/index.rst b/Documentation/admin-guide/nfs/index.rst index 365f42a611a4..3601a708f333 100644 --- a/Documentation/admin-guide/nfs/index.rst +++ b/Documentation/admin-guide/nfs/index.rst @@ -11,3 +11,4 @@ NFS nfsd-admin-interfaces nfs-idmapper pnfs-block-server + pnfs-scsi-server diff --git a/Documentation/admin-guide/nfs/pnfs-scsi-server.rst b/Documentation/admin-guide/nfs/pnfs-scsi-server.rst new file mode 100644 index 000000000000..d2f6ee558071 --- /dev/null +++ b/Documentation/admin-guide/nfs/pnfs-scsi-server.rst @@ -0,0 +1,24 @@ + +================================== +pNFS SCSI layout server user guide +================================== + +This document describes support for pNFS SCSI layouts in the Linux NFS server. +With pNFS SCSI layouts, the NFS server acts as Metadata Server (MDS) for pNFS, +which in addition to handling all the metadata access to the NFS export, +also hands out layouts to the clients so that they can directly access the +underlying SCSI LUNs that are shared with the client. + +To use pNFS SCSI layouts with with the Linux NFS server, the exported file +system needs to support the pNFS SCSI layouts (currently just XFS), and the +file system must sit on a SCSI LUN that is accessible to the clients in +addition to the MDS. As of now the file system needs to sit directly on the +exported LUN, striping or concatenation of LUNs on the MDS and clients +is not supported yet. + +On a server built with CONFIG_NFSD_SCSI, the pNFS SCSI volume support is +automatically enabled if the file system is exported using the "pnfs" +option and the underlying SCSI device support persistent reservations. +On the client make sure the kernel has the CONFIG_PNFS_BLOCK option +enabled, and the file system is mounted using the NFSv4.1 protocol +version (mount -o vers=4.1). |