On Wed, Jun 13, 2012 at 05:56:56PM -0500, Timothy Coalson wrote: > client: ubuntu 11.10 > /etc/fstab entry: <server>:/mainpool/storage /mnt/myelin nfs > bg,retry=5,soft,proto=tcp,intr,nfsvers=3,noatime,nodiratime,async 0 > 0
nfsvers=3 > NAME PROPERTY VALUE SOURCE > mainpool/storage sync standard default sync=standard This is expected behaviour for this combination. NFS 3 semantics are for persistent writes at the server regardless - and mostly also for NFS 4. The async client mount option relates to when the writes get shipped to the server (immediately or delayed in dirty pages), rather than to how the server should handle those writes once they arrive. You could set sync=disabled if you're happy with the consequences, or even just as a temporary test to confirm the impact. It sounds like you would be since that's what you're trying to achieve. There is a difference: async on the client means data is lost on a client reboot, async on the server means data may be lost on a server reboot (and the client/application confused by inconsistencies as a result). Separate datasets (and mounts) for data with different persistence requirements can help. -- Dan.
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