Description of Problem: Writing to a filesystem mounted from a Solaris 2.6 host give massive performance problems. Copying a 2.5 MByte file to that fs lasts for 5 Minutes. ping times to the Solaris host increase from 0.157 ms to over 6 ms. Adding rsize=8192,wsize=8192 to the mount options gives back normal performance. There was no problem with the same filesystem and RedHat-7.2 (enigma) The problem exists also in the kernel and nfs-utils in rawhide Version-Release number of selected component (if applicable): How Reproducible: Steps to Reproduce: 1. 2. 3. Actual Results: Expected Results: Additional Information:
rsize=8192,wsize=8192 is the recommended tuning for solaris servers (and discouraged for all others)....... as per manpage of mount
I still think it is a bug. If i upgrade from an enigma system, the performances decreases without any obvious reason The man page says rsize=8192,wsize=8192 This will make your nfs connection faster than with the default buffer size of 4096. (NFSv2 does not work with larger values of rsize and wsize.) This does not mention solaris nor does it consider the fact that the "bug" oncly o occurs during write operations to the file system.
I am having the same problem with 7.2.93, even when the filesystem is mounted with rsize and wsize to 8192: yoda:/export/yoda1 on /yoda1 type nfs (rw,noatime,intr,timeo=11,rsize=8192,wsize=8192,addr=192.168.117.10) Here is the result of an test where I copied a ~500k file over another ~500k file: {dgl@endor:6} ls -l diary diary.020424 -rw-r--r-- 1 dgl users 555875 Apr 25 06:03 diary -rw-r--r-- 1 dgl users 555587 Apr 24 23:43 diary.020424 {dgl@endor:9} /bin/date ; /bin/cp diary diary.020424 ; /bin/date Thu Apr 25 06:09:59 PDT 2002 Thu Apr 25 06:20:00 PDT 2002 It took 10 minutes! During that 10 minutes, I took some ping statistics from a different computer to the NFS host: [root@vader dgl]# ping -f yoda PING yoda.integrinautics.com (192.168.117.10): 56 data bytes --- yoda.integrinautics.com ping statistics --- 542 packets transmitted, 510 packets received, 5% packet loss round-trip min/avg/max = 124.5/127.1/130.0 ms After the copy (finally) finished, I took more ping statistics: [root@vader dgl]# ping -f yoda PING yoda.integrinautics.com (192.168.117.10): 56 data bytes --- yoda.integrinautics.com ping statistics --- 13665 packets transmitted, 13664 packets received, 0% packet loss round-trip min/avg/max = 0.1/0.2/10.0 ms Ping was ~500x slower on average!
Thanks for the bug report. However, Red Hat no longer maintains this version of the product. Please upgrade to the latest version and open a new bug if the problem persists. The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, and if you believe this bug is interesting to them, please report the problem in the bug tracker at: http://bugzilla.fedora.us/