"Richard L. Rhodes" wrote:
NFS will block if you run everything through one mount point.
I don't understand this, but then there's so much I don't understand about NFS. This is something else Netapp needs to consider when selling a Netapp as a db disk subsystem. Were fairly good at using disk subsystems, but we have little experience with NFS.
Anyway, are you saying that a NFS mount point can only have one outstanding i/o across it at any point? From what I read each biod could have one outstanding i/o although the manual didn't say anything about mount points.
I base my comments on notes from bCandid, who has extensive experience supporting Usenet News running on NFS. bCandid recommends many mounts and my experience supports that position.
Try distributing your data files across two mounts and place them so that I/O should be evenly balanced between the two mount points. See if load at the filer rises. See if client performance improves. I make no promises for your environment.