Hi Robert, Our X4500 configuration is multiple 6-way (across controllers) RAID-Z2 groups striped together. Currently, 3 RZ2 groups. I'm about to test write performance against ZFS RAID-10. I'm curious why RAID-Z2 performance should be good? I assumed it was an analog to RAID-6. In our recent experience RAID-5 due to the 2 reads, a XOR calc and a write op per write instruction is usually much slower than RAID-10 (two write ops). Any advice is greatly appreciated.
Best Regards, Jason On 1/3/07, Robert Milkowski <[EMAIL PROTECTED]> wrote:
Hello Jason, Wednesday, January 3, 2007, 11:11:31 PM, you wrote: JJWW> Hi Richard, JJWW> Hmm....that's interesting. I wonder if its worth benchmarking RAIDZ2 JJWW> if those are the results you're getting. The testing is to see the JJWW> performance gain we might get for MySQL moving off the FLX210 to an JJWW> active/passive pair of X4500s. Was hoping with that many SATA disks JJWW> RAIDZ2 would provide a nice safety net. Well, you weren't thinking about one big raidz2 group? To get more performance you can create one pool with many smaller raidz2 groups - that way your worst case read performance should increase approximately N times where N is number of raidz-2 groups. However keep in mind that write performance should be really good with raidz2. -- 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
