Re: [zfs-discuss] zpool imports are slow when importing multiple storage pools
On Mon, Oct 06, 2008 at 05:08:13PM -0700, Richard Elling wrote: > Scott Williamson wrote: > > Speaking of this, is there a list anywhere that details what we can > > expect to see for (zfs) updates in S10U6? > > The official release name is "Solaris 10 10/08" Ooops - no beta this time? Regards, jel. -- Otto-von-Guericke University http://www.cs.uni-magdeburg.de/ Department of Computer Science Geb. 29 R 027, Universitaetsplatz 2 39106 Magdeburg, Germany Tel: +49 391 67 12768 ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] zpool imports are slow when importing multiple storage pools
Scott Williamson wrote: > Speaking of this, is there a list anywhere that details what we can > expect to see for (zfs) updates in S10U6? The official release name is "Solaris 10 10/08" http://www.sun.com/software/solaris/10 has links to "what's new" videos. When the release is downloadable, full doc set will be ready. -- richard ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] zpool imports are slow when importing multiple storage pools
Speaking of this, is there a list anywhere that details what we can expect to see for (zfs) updates in S10U6? On Mon, Oct 6, 2008 at 2:44 PM, Richard Elling <[EMAIL PROTECTED]>wrote: > Do you have a lot of snapshots? If so, CR 6612830 could be contributing. > Alas, many such fixes are not yet available in S10. > -- richard > > ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] zpool imports are slow when importing multiple storage pools
Do you have a lot of snapshots? If so, CR 6612830 could be contributing. Alas, many such fixes are not yet available in S10. -- richard Luke Schwab wrote: > Hi, > I am having a problem running zpool imports when we import multiple storage > pools at one time. Below are the details of the setup: > > - We are using a SAN with Sun 6140 storage arrays. > - Dual port HBA on each server is Qlogic running the QLC driver with Sun > mpxio(SFCSM) running. > - We have 400+ luns on the SAN. We can't split them up because the luns any > of the luns may be able to failover between the different servers. We are > running rather large farm where all servers need to see all the luns in case > of failover. > -Running Solaris 10 U5 kernal. > > Below are the times I see when importing pools from the SAN storage: > 1 pool - 30 seconds > 2 pools - 1 minute for both to finish > 3 pools - 1 min 30 sec for all 3 to finish > 4 pools - 2 minutes for all 4 to finish > > When I run more then one zpool import in parallel, I can see that all zpool > imports are queued up. The more pools I try to import, the longer the pools > take to import. For example, when importing 2 pools, the first pool takes 1 > minute but then just a few seconds later the 2nd pool finishes its import. > When I import 3 pools, the first pool takes 1.5 minutes and then the other > two pools finish just after that. > > The problem we are seeing it that we need to failover up to 32 pools at one > time on a server and the imports end up timing out after 5-10 minutes because > we are trying to import too many pools at one time. > > Is this a design choice with ZFS coding or a bug? Is there anything I can do > to increase my import times? We do have the same setup on one of our SANs > with only 10-20 luns instead of 400+ and the imports take only 1-3 seconds. > My guess here is that the large number of luns is effecting imports. But our > virtual farm design is broken if we can imported at least 30-40 luns in under > a minute on a given server. > > Any thoughts or questions would be great. > > Thanks, > Luke > -- > This message posted from opensolaris.org > ___ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] zpool imports are slow when importing multiple storage pools
On 06 October, 2008 - Luke Schwab sent me these 2,0K bytes:
> Is this a design choice with ZFS coding or a bug? Is there anything I
> can do to increase my import times? We do have the same setup on one
> of our SANs with only 10-20 luns instead of 400+ and the imports take
> only 1-3 seconds. My guess here is that the large number of luns is
> effecting imports. But our virtual farm design is broken if we can
> imported at least 30-40 luns in under a minute on a given server.
I believe it will scan all available devices (LUNs) for pool
information.. If you only want to scan a subset, you can for instance
make a new directory somewhere and put symlinks there to the real
devices, then 'zpool import -d /that/directory' to only search there
for devices to consider.
/Tomas
--
Tomas Ögren, [EMAIL PROTECTED], http://www.acc.umu.se/~stric/
|- Student at Computing Science, University of Umeå
`- Sysadmin at {cs,acc}.umu.se
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[zfs-discuss] zpool imports are slow when importing multiple storage pools
Hi, I am having a problem running zpool imports when we import multiple storage pools at one time. Below are the details of the setup: - We are using a SAN with Sun 6140 storage arrays. - Dual port HBA on each server is Qlogic running the QLC driver with Sun mpxio(SFCSM) running. - We have 400+ luns on the SAN. We can't split them up because the luns any of the luns may be able to failover between the different servers. We are running rather large farm where all servers need to see all the luns in case of failover. -Running Solaris 10 U5 kernal. Below are the times I see when importing pools from the SAN storage: 1 pool - 30 seconds 2 pools - 1 minute for both to finish 3 pools - 1 min 30 sec for all 3 to finish 4 pools - 2 minutes for all 4 to finish When I run more then one zpool import in parallel, I can see that all zpool imports are queued up. The more pools I try to import, the longer the pools take to import. For example, when importing 2 pools, the first pool takes 1 minute but then just a few seconds later the 2nd pool finishes its import. When I import 3 pools, the first pool takes 1.5 minutes and then the other two pools finish just after that. The problem we are seeing it that we need to failover up to 32 pools at one time on a server and the imports end up timing out after 5-10 minutes because we are trying to import too many pools at one time. Is this a design choice with ZFS coding or a bug? Is there anything I can do to increase my import times? We do have the same setup on one of our SANs with only 10-20 luns instead of 400+ and the imports take only 1-3 seconds. My guess here is that the large number of luns is effecting imports. But our virtual farm design is broken if we can imported at least 30-40 luns in under a minute on a given server. Any thoughts or questions would be great. Thanks, Luke -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
