On 18 February, 2010 - Chris Banal sent me these 1,8K bytes: > We have a SunFire X4500 running Solaris 10U5 which does about 5-8k nfs ops > of which about 90% are meta data. In hind sight it would have been > significantly better to use a mirrored configuration but we opted for 4 x > (9+2) raidz2 at the time. We can not take the downtime necessary to change > the zpool configuration. > > We need to improve the meta data performance with little to no money. Does > anyone have any suggestions? Is there such a thing as a Sun supported NVRAM > PCI-X card compatible with the X4500 which can be used as an L2ARC?
See if it helps sticking a few cheap USB sticks in there, and set secondarycache=metadata.. For instance Kingston DT Slim Mini are not that bad performers and cost close to nothing. I've got two in a server here, and reading random 4k blocks they do 1500 iops each which is probably more than your current disks. Or if you can stick an Intel X25-M/E in there through SATA/SAS. You can add/remove L2ARCs at will and they don't need to be 100% reliable either, so if you add several of them they will be raid0'd for performance. /Tomas -- Tomas Ögren, st...@acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at Computing Science, University of Umeå `- Sysadmin at {cs,acc}.umu.se _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
