Hello everybody, I recently migrated a file server (NFS & Samba) from OpenSolaris (Build 111) to Sol11. This the move we are facing random (or random looking) outages of our Samba. As we have moved several folders (like Desktop and ApplicationData) out of the usual profile to a folder inside the users home share, the setup is sensible about timeouts. From time to time users are getting the infamous Windows "Delayed Write Failure". After checking nearly every parameter that came to my mind in the last days, the zfs-auto-snapshot mechanism inside Solaris 11 came to my attention. We had hourly and daily snapshot enabled and discovered that the snapshots are not rotated as expected. As there were known issues (if I remember correctly) with timesliderd in OpenIndiana and we had the old zfs-auto-snap mechanism (without timesliderd) running without any problems before the update, I''m wondering if the are any known (performance) issues with the stuff in Solaris 11. thx Carsten
2012-06-26 23:57, Carsten John wrote:> Hello everybody, > > I recently migrated a file server (NFS & Samba) from OpenSolaris (Build 111) to Sol11.> (After?) the move we are facing random (or random looking) outages of our Samba... As for the timeouts, check if your tuning (i.e. the migrated files like /etc/system) don''t enforce long TXG syncs (default was 30sec) or something like that. Find some DTrace scripts to see if ZIL is intensively used during these user-profile writes, and if these writes are synchronous - maybe an SSD/DDR logging device might be useful for this scenario? Regarding the zfs-auto-snapshot, it is possible to install the old scripted package from OpenSolaris onto Solaris 10 at least; I did not have much experience with newer releases yet (timesliderd) so can''t help better. HTH, //Jim Klimov
-----Original message----- CC: ZFS Discussions <zfs-discuss at opensolaris.org>; From: Jim Klimov <jimklimov at cos.ru> Sent: Tue 26-06-2012 22:34 Subject: Re: [zfs-discuss] snapshots slow on sol11?> 2012-06-26 23:57, Carsten John wrote: > > Hello everybody, > > > > I recently migrated a file server (NFS & Samba) from OpenSolaris (Build 111) > to Sol11. > > (After?) the move we are facing random (or random looking) outages of > our Samba... > > As for the timeouts, check if your tuning (i.e. the migrated files > like /etc/system) don''t enforce long TXG syncs (default was 30sec) > or something like that. > > Find some DTrace scripts to see if ZIL is intensively used during > these user-profile writes, and if these writes are synchronous - > maybe an SSD/DDR logging device might be useful for this scenario? > > Regarding the zfs-auto-snapshot, it is possible to install the old > scripted package from OpenSolaris onto Solaris 10 at least; I did > not have much experience with newer releases yet (timesliderd) so > can''t help better. > > HTH, > //Jim Klimov > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >Hi everybody, in the meantime I was able to eliminate the snapshots. I disabled snapshot, but the issue still persists. I will now check Jim''s suggestions. thx so far Carsten
Hung-Sheng Tsao (LaoTsao) Ph.D
2012-Jun-27 11:23 UTC
[zfs-discuss] snapshots slow on sol11?
hi just wondering can you change from samba to SMB? regards Sent from my iPad On Jun 27, 2012, at 2:46, Carsten John <cjohn at mpi-bremen.de> wrote:> -----Original message----- > CC: ZFS Discussions <zfs-discuss at opensolaris.org>; > From: Jim Klimov <jimklimov at cos.ru> > Sent: Tue 26-06-2012 22:34 > Subject: Re: [zfs-discuss] snapshots slow on sol11? >> 2012-06-26 23:57, Carsten John wrote: >>> Hello everybody, >>> >>> I recently migrated a file server (NFS & Samba) from OpenSolaris (Build 111) >> to Sol11. >>> (After?) the move we are facing random (or random looking) outages of >> our Samba... >> >> As for the timeouts, check if your tuning (i.e. the migrated files >> like /etc/system) don''t enforce long TXG syncs (default was 30sec) >> or something like that. >> >> Find some DTrace scripts to see if ZIL is intensively used during >> these user-profile writes, and if these writes are synchronous - >> maybe an SSD/DDR logging device might be useful for this scenario? >> >> Regarding the zfs-auto-snapshot, it is possible to install the old >> scripted package from OpenSolaris onto Solaris 10 at least; I did >> not have much experience with newer releases yet (timesliderd) so >> can''t help better. >> >> HTH, >> //Jim Klimov >> >> _______________________________________________ >> zfs-discuss mailing list >> zfs-discuss at opensolaris.org >> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >> > > > Hi everybody, > > in the meantime I was able to eliminate the snapshots. I disabled snapshot, but the issue still persists. I will now check Jim''s suggestions. > > thx so far > > > Carsten > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss