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
