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| author | Andy Adamson | 2011-03-01 02:34:22 +0100 |
|---|---|---|
| committer | Trond Myklebust | 2011-03-11 21:38:43 +0100 |
| commit | 568e8c494ded95a28c5dd8b79b4d3ffb95b6d845 (patch) | |
| tree | 00e71f79575635c0ddfcd1210e263088cc121da2 /Documentation/filesystems/nfs | |
| parent | NFSv4.1 move deviceid cache to filelayout driver (diff) | |
| download | kernel-qcow2-linux-568e8c494ded95a28c5dd8b79b4d3ffb95b6d845.tar.gz kernel-qcow2-linux-568e8c494ded95a28c5dd8b79b4d3ffb95b6d845.tar.xz kernel-qcow2-linux-568e8c494ded95a28c5dd8b79b4d3ffb95b6d845.zip | |
NFSv4.1: turn off pNFS on ds connection failure
If a data server is unavailable, go through MDS.
Mark the deviceid containing the data server as a negative cache entry.
Do not try to connect to any data server on a deviceid marked as a negative
cache entry. Mark any layout that tries to use the marked deviceid as failed.
Inodes with a layout marked as fails will not use the layout for I/O, and will
not perform any more layoutgets.
Inodes without a layout will still do layoutget, but the layout will get
marked immediately.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'Documentation/filesystems/nfs')
0 files changed, 0 insertions, 0 deletions