mcclurmc/xcp-storage-managers — pull request #1 by amscanne (2012-02-14 18:04:54+00:00)
Title: All NFS-based SR's shouldn't have attribute caching disabled

Disabling all attribute caching makes all NFS SR mounts unusable except
for files opened with O_DIRECT (i.e., virtual machine disk images). This
is pretty unreasonable. Instead, consistency can be dramatically improved
by reducing the caching time but not going right to zero.

Signed-off-by: Adin Scannell

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It would seem that disabling caching was motivated by some internal issue. However, I wanted to kick off a discussion on what can be done to improve this situation, as NFS-based SRs are currently not really usable for any purpose other than stored disk images.