Hello, Edward Ned Harvey wrote:
Yes, I have SSD for ZIL. Just one SSD. 32G. But if this is the problem, then you'll have the same poor performance on the local machine that you have over NFS. So I'm curious to see if you have the same poor performance locally. The ZIL does not need to be reliable; if it fails, the ZIL will begin writing to the main storage, and performance will suffer until the new SSD is put into production.
I am also planning to install a SSD as ZILlog. Is it really true that there are no problems if the ZILlog fails and there is no mirror of the ZILlog? What about the data that were on the ZILlog SSD at the time of failure, is a copy of the data still in the machines memory from where it can be used to put the transaction to the stable storage pool? What if the machine reboots after the SSD has failed? The ZFS Best Practices Guide commends to mirror the log: http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide#Storage_Pool_Performance_Considerations Mirroring the log device is highly recommended. Protecting the log device by mirroring will allow you to access the storage pool even if a log device has failed. Failure of the log device may cause the storage pool to be inaccessible if you are running the Solaris Nevada release prior to build 96 and a release prior to the Solaris 10 10/09 release. For more information, see CR 6707530. http://bugs.opensolaris.org/view_bug.do?bug_id=6707530 No probs with that if I use Sol10U8? Regrads, Michael. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
