On Wed, 2012-01-18 at 23:21 +0800, Lee Standen wrote: > Out of interest, has the NFS issue been tested on NFS4? My > understanding is that NFS4 has a lot of fixes for the locking/caching > problems that plague NFS3, and we were planning to use NFS4 from day > one.
I've tried with Linux NFS4 server+client a few years ago. It seemed to have all the same caching problems as NFS3. > If this hasn't been tested, is there some kind of load simulator that > we could run to see if the issue does occur in our environment? http://imapwiki.org/ImapTest should easily trigger it. Just run it against two servers, both hammering the same mailbox.