Re: [zfs-discuss] nfs and smb performance
That is the first thing i checked. Prior to that I was getting somewhere around 1 ~ 5 MB/sec. Thank you though. Dale Ghent [EMAIL PROTECTED] wrote: Have you turned on the Ignore cache flush commands option on the xraids? You should ensure this is on when using ZFS on them. /dale On Mar 27, 2008, at 6:16 PM, abs wrote: hello all, i have two xraids connect via fibre to a poweredge2950. the 2 xraids are configured with 2 raid5 volumes each, giving me a total of 4 raid5 volumes. these are striped across in zfs. the read and write speeds local to the machine are as expected but i have noticed some performance hits in the read and write speed over nfs and samba. here is the observation: each filesystem is shared via nfs as well as samba. i am able to mount via nfs and samba on a Mac OS 10.5.2 client. i am able to only mount via nfs on a Mac OS 10.4.11 client. (there seems to be authentication/encryption issue between the 10.4.11 client and solaris box in this scenario. i know this is a bug on the client side) when writing a file via nfs from the 10.5.2 client the speeds are 60 ~ 70 MB/sec. when writing a file via samba from the 10.5.2 client the speeds are 30 ~ 50 MB/sec when writing a file via nfs from the 10.4.11 client the speeds are 20 ~ 30 MB/sec. when writing a file via samba from a Windows XP client the speeds are 30 ~ 40 MB. i know that there is an implementational difference in nfs and samba on both Mac OS 10.4.11 and 10.5.2 clients but that still does not explain the Windows scenario. i was wondering if anyone else was experiencing similar issues and if there is some tuning i can do or am i just missing something. thanx in advance. cheers, abs Never miss a thing. Make Yahoo your homepage.___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss - Never miss a thing. Make Yahoo your homepage.___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] nfs and smb performance
Sorry for being vague but I actually tried it with the cifs in zfs option, but I think I will try the samba option now that you mention it. Also is there a way to actually improve the nfs performance specifically? cheers, abs Peter Brouwer, Principal Storage Architect, Office of the Chief Technologist, Sun MicroSystems [EMAIL PROTECTED] wrote: Hello abs Would you be able to repeat the same tests for the cifs in zfs option instead of using samba? Would be interesting to see how the kernel cifs versus the samba performance compare. Peter abs wrote: hello all, i have two xraids connect via fibre to a poweredge2950. the 2 xraids are configured with 2 raid5 volumes each, giving me a total of 4 raid5 volumes. these are striped across in zfs. the read and write speeds local to the machine are as expected but i have noticed some performance hits in the read and write speed over nfs and samba. here is the observation: each filesystem is shared via nfs as well as samba. i am able to mount via nfs and samba on a Mac OS 10.5.2 client. i am able to only mount via nfs on a Mac OS 10.4.11 client. (there seems to be authentication/encryption issue between the 10.4.11 client and solaris box in this scenario. i know this is a bug on the client side) when writing a file via nfs from the 10.5.2 client the speeds are 60 ~ 70 MB/sec. when writing a file via samba from the 10.5.2 client the speeds are 30 ~ 50 MB/sec when writing a file via nfs from the 10.4.11 client the speeds are 20 ~ 30 MB/sec. when writing a file via samba from a Windows XP client the speeds are 30 ~ 40 MB. i know that there is an implementational difference in nfs and samba on both Mac OS 10.4.11 and 10.5.2 clients but that still does not explain the Windows scenario. i was wondering if anyone else was experiencing similar issues and if there is some tuning i can do or am i just missing something. thanx in advance. cheers, abs - Never miss a thing. Make Yahoo your homepage. - ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss -- Regards Peter Brouwer, Sun Microsystems Linlithgow Principal Storage Architect, ABCP DRII Consultant Office:+44 (0) 1506 672767 Mobile:+44 (0) 7720 598226 Skype :flyingdutchman_,flyingdutchman_l - Never miss a thing. Make Yahoo your homepage.___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Periodic flush
you may want to try disabling the disk write cache on the single disk. also for the RAID disable 'host cache flush' if such an option exists. that solved the problem for me. let me know. Bob Friesenhahn [EMAIL PROTECTED] wrote: On Thu, 27 Mar 2008, Neelakanth Nadgir wrote: This causes the sync to happen much faster, but as you say, suboptimal. Haven't had the time to go through the bug report, but probably CR 6429205 each zpool needs to monitor its throughput and throttle heavy writers will help. I hope that this feature is implemented soon, and works well. :-) I tested with my application outputting to a UFS filesystem on a single 15K RPM SAS disk and saw that it writes about 50MB/second and without the bursty behavior of ZFS. When writing to ZFS filesystem on a RAID array, zpool I/O stat reports an average (over 10 seconds) write rate of 54MB/second. Given that the throughput is not much higher on the RAID array, I assume that the bottleneck is in my application. Are the 'zpool iostat' statistics accurate? Yes. You could also look at regular iostat and correlate it. Iostat shows that my RAID array disks are loafing with only 9MB/second writes to each but with 82 writes/second. Bob == Bob Friesenhahn [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer,http://www.GraphicsMagick.org/ ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss - Looking for last minute shopping deals? Find them fast with Yahoo! Search.___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] nfs and smb performance
hello all, i have two xraids connect via fibre to a poweredge2950. the 2 xraids are configured with 2 raid5 volumes each, giving me a total of 4 raid5 volumes. these are striped across in zfs. the read and write speeds local to the machine are as expected but i have noticed some performance hits in the read and write speed over nfs and samba. here is the observation: each filesystem is shared via nfs as well as samba. i am able to mount via nfs and samba on a Mac OS 10.5.2 client. i am able to only mount via nfs on a Mac OS 10.4.11 client. (there seems to be authentication/encryption issue between the 10.4.11 client and solaris box in this scenario. i know this is a bug on the client side) when writing a file via nfs from the 10.5.2 client the speeds are 60 ~ 70 MB/sec. when writing a file via samba from the 10.5.2 client the speeds are 30 ~ 50 MB/sec when writing a file via nfs from the 10.4.11 client the speeds are 20 ~ 30 MB/sec. when writing a file via samba from a Windows XP client the speeds are 30 ~ 40 MB. i know that there is an implementational difference in nfs and samba on both Mac OS 10.4.11 and 10.5.2 clients but that still does not explain the Windows scenario. i was wondering if anyone else was experiencing similar issues and if there is some tuning i can do or am i just missing something. thanx in advance. cheers, abs - Never miss a thing. Make Yahoo your homepage.___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
