On Thu, Jul 1, 2010 at 11:01 AM, alan bryan <alan.br...@yahoo.com> wrote: > Setup: > > server - FreeBSD 8-stable from today. 2 UFS dirs exported via NFS. > client - FreeBSD 8.0-Release. Running a test php script that copies around > various files to/from 2 separate NFS mounts. > > Situation: > > script is started (forked to do 20 simultaneous runs) and 20 1GB files are > copied to the NFS dir which works fine. When it then switches to reading > those files back and simultaneously writing to the other NFS mount I see a > hang of 75 seconds. If I do an "ls -l" on the NFS mount it hangs too. After > 75 seconds the client has reported: > > nfs server 192.168.10.133:/usr/local/export1: not responding > nfs server 192.168.10.133:/usr/local/export1: is alive again > nfs server 192.168.10.133:/usr/local/export1: not responding > nfs server 192.168.10.133:/usr/local/export1: is alive again > > and then things start working again. The server was originally FreeBSD > 8.0-Release also but was upgraded to the latest stable to see if this issue > could be avoided. > > # nfsstat -s -W -w 1 > GtAttr Lookup Rdlink Read Write Rename Access Rddir > 0 0 0 222 257 0 0 0 > 0 0 0 178 135 0 0 0 > 0 0 0 85 127 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > 0 0 0 0 0 0 0 0 > > ... for 75 rows of all zeros > > 0 0 0 272 266 0 0 0 > 0 0 0 167 165 0 0 0 > > I also tried runs with 15 simultaneous processes and 25. 15 processes gave > only about a 5 second stall but 25 gave again the same 75 second stall. > > Further, I tested with 2 mounts to the same server but from ZFS filesytems > with the exact same stall/timeout periods. So, it doesn't appear to matter > what the underlying filesystem is - it's something in NFS or networking code. > > Any ideas on what's going on here? What's causing the complete stall period > of zero NFS activity? Any flaws with my testing methods? > > Thanks for any and all help/ideas.
What network driver are you using? Have you tried tcpdumping the packets? -Garrett _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
