I am having the same issues with nfs mounts. IOZone tests would fail on
anything over 10Mb. I recompiled nfs-common and it seams to have fixed
the issue for me. Maybe this will help isolate the issue for everyone
else. This was tested on my Lucid server. Please don't laugh at my nfs
server performance. I know it stinks.
Here's how I compiled nfs-utils:
r...@dev-0:~# apt-get install build-essential fakeroot dpkg-dev -y
r...@dev-0:~# mkdir build
r...@dev-0:~# cd build
r...@dev-0:~/build# apt-get source nfs-common
r...@dev-0:~/build# apt-get build-dep nfs-common -y
r...@dev-0:~/build# dpkg-source -x nfs-utils_1.2.0-4ubuntu4.dsc
r...@dev-0:~/build# cd nfs-utils-1.2.0/
r...@dev-0:~/build/nfs-utils-1.2.0# dpkg-buildpackage -rfakeroot -b
r...@dev-0:~/build/nfs-utils-1.2.0# dpkg -i
../nfs-common_1.2.0-4ubuntu4_amd64.deb
My Kernel:
Linux mup-4 2.6.32-26-server #47-Ubuntu SMP Wed Nov 17 17:05:29 UTC 2010 x86_64
GNU/Linux
My IOZone test:
r...@dev-0:~# iozone -i0 -r4k -s1G -e -t1 -F /mnt/slow/vol16/test
Iozone: Performance Test of File I/O
Version $Revision: 3.308 $
Compiled for 64 bit mode.
Build: linux
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root.
Run began: Fri Dec 3 15:20:33 2010
Record Size 4 KB
File size set to 1048576 KB
Include fsync in write timing
Command line used: iozone -i0 -r4k -s1G -e -t1 -F /mnt/slow/vol16/test
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
Throughput test with 1 process
Each process writes a 1048576 Kbyte file in 4 Kbyte records
Children see throughput for 1 initial writers = 2341.93 KB/sec
Parent sees throughput for 1 initial writers = 2341.93 KB/sec
Min throughput per process = 2341.93 KB/sec
Max throughput per process = 2341.93 KB/sec
Avg throughput per process = 2341.93 KB/sec
Min xfer = 1048576.00 KB
Children see throughput for 1 rewriters = 3055.24 KB/sec
Parent sees throughput for 1 rewriters = 3055.22 KB/sec
Min throughput per process = 3055.24 KB/sec
Max throughput per process = 3055.24 KB/sec
Avg throughput per process = 3055.24 KB/sec
Min xfer = 1048576.00 KB
iozone test complete.
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https://bugs.launchpad.net/bugs/661294
Title:
System lock-up when receiving large files (big data amount) from NFS server
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