On Sat, Apr 11, 2009 at 08:35:08PM +1200, Nicholas Lee wrote: > Supermicro have several LSI controllers. AOC-USASLP-L8i with the LSI 1068E > and AOC-USASLP-H8iR with the LSI 1078. > > Are they stable? How does is the performance compare to the Marvel? Does > hot swap cause problems?
I've run both the 1068 and 1078 LSI based cards. They've both been nothing but stable and fast. I haven't tried hotswap yet since it's "not an option" as in both uses I would have had to open the case to get to the drives which would have caused the machines to power off. > The LSI1068E has 16MB SRAM onboard cache - I expect this helps > performances, but does it causes issues with ZIL? It never caused me any issues. > The LSI1078 has 512MB DDR2 onboard cache with a battery backup option. > With OpenSolaris will this function as a NVRAM when using the battery > backup option, allowing "zil disable"? Has anyone tested this? Is it useful > at all? I'm running 4 73G 15K RPM SAS disks in two hardware RAID0 arrays that are mirrored by ZFS. I won't ever do 'zil disable' so I can't speak to that, but without any sort of tweaking, I can pull a solid 200MB/sec off of them. I don't know if the cache will kick in if you were to do something like a single disk in a RAID0 or if that's even possible, but one day I hope to get a chance to try that. > Or is it better to consider SSD caches instead of the above for zfs? One day I'll have the money for an SSD or two and I'll let you know. Don't hold you breath. ;) -brian -- "Coding in C is like sending a 3 year old to do groceries. You gotta tell them exactly what you want or you'll end up with a cupboard full of pop tarts and pancake mix." -- IRC User (http://www.bash.org/?841435) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
