> Gino wrote: > > The real problem is that ZFS should stop to force > kernel panics. > > > I found these panics very annoying, too. And even > more that the zpool > was faulted afterwards. But my problem is that when > someone asks me what > ZFS should do instead, I have no idea.
well, what about just hang processes waiting for I/O on that zpool? Could be possible? > Seagate FibreChannel drives, Cheetah 15k, ST3146855FC > for the databases. What king of JBOD for that drives? Just to know ... We found Xyratex's to be good products. > That depends on the indivdual requirements of each > service. Basically, > we change to recordsize according to the transaction > size of the > databases and, on the filers, the performance results > were best when the > recordsize was a bit lower than the average file size > (average file size > is 12K, so I set a recordsize of 8K). I set a vdev > cache size of 8K and > our databases worked best with a vq_max_pending of > 32. ZFSv3 was used, > that's the version which is shipped with Solaris 10 > 11/06. thanks for sharing. > Yes, but why doesn't your application fail over to a > standby? It is a little complex to explain. Basically that apps are making a lot of "number cruncing" on some a very big data in ram. Failover would be starting again from the beginning, with all the customers waiting for hours (and loosing money). We are working on a new app, capable to work with a couple of nodes but it will takes some months to be in beta, then 2 years of testing ... > a system reboot can be a single point of failure, > what about the network > infrastructure? Hardware errors? Or power outages? We use Sunfire for that reason. We had 2 cpu failures and no service interruption, the same for 1 dimm module (we have been lucky with cpu failures ;)). HDS raid arrays are excellent about availability. Lots of fc links, network links .. All this is in a fully redundant datacenter .. and, sure, we have a stand by system on a disaster recovery site (hope to never use it!). > I'm definitely NOT some kind of know-it-all, don't > misunderstand me. > Your statement just let my alarm bells ring and > that's why I'm asking. Don't worry Ralf. Any suggestion/opinion/critic is welcome. It's a pleasure to exchange our experience Gino This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
