Hi, On Sep 05 04:36 PM, Chuck Lever wrote: > I have the latest Fedora 9 kernels on two clients, mounting via NFSv3 > using "actimeo=600" (for other reasons). The server is OpenSolaris > 2008.5. > > reader.py reported zeroes in the test file after about 5 minutes. Awesome. Thanks for testing! Our actime is much shorter which is probably why it happens sooner for us. > Looking at the file a little later, I don't see any problems with it. > > Since your scripts are not using any kind of serialization (ie file > locking) between the clients, I wonder if non-determinant behavior is > to be expected. Hmm... yep. I don't know what guarantees we want to make. The behavior doesn't seem to be consistent with older kernels though... so I'm thinking it might be a bug. We hit this particular issue because we have scripts which essentially 'tail -f' log files looking for errors. They miss log messages (and see corrupted ones) b/c of the NULLs. That's also why there is no serialization.... we don't need it when grep'ing through log messages. I'm bisecting now. I see a block of intricate-looking NFS patches, I'll try to narrow it down to a particular commit. I'll also get the wireshark data at that point. Thanks, =a= -- =================== Aaron Straus aaron@xxxxxxxxxxxxx
Attachment:
signature.asc
Description: Digital signature
