Hello James, Wednesday, January 24, 2007, 10:31:46 PM, you wrote:
JFH> Robert Milkowski wrote: >> Hello James, >> >> Wednesday, January 24, 2007, 3:20:14 PM, you wrote: >> >> JFH> Since we're talking about various hardware configs, does anyone know >> JFH> which controllers with battery backup are supported on Solaris? If >> JFH> we build a big ZFS box I'd like to be able to turn on write caching >> JFH> on the drives but have them battery-backed in the event of a power >> JFH> loss. Are 3ware cards going to be supported any time soon? >> >> JFH> I checked and there doesn't seem to be a battery backup option >> JFH> for Thumper. Is that right? Does anyone know if there plans for >> JFH> that? >> >> ZFS makes sure itself that transaction is on disk by issuing write >> cache flush command to disks. So you don't have to worry about it. JFH> Ok, does that negate the performance gains of having the write cache JFH> on? JFH> I guess what I'm really asking is with the problems I and others have JFH> noted with NFS/ZFS, what's currently the best way to get good NFS JFH> performance without sacrificing reliability (i.e., disabling the ZIL, JFH> etc). JFH> If a battery-backed cache isn't necessary, all the better. I thought you were worried about write cache in disks - if you dedicate whole disks for zfs on x4500 write cache on disks will be enabled by default. But if you are talking about another level of cache then you're right - currently you can't do it on x4500. -- Best regards, Robert mailto:[EMAIL PROTECTED] http://milek.blogspot.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
