Hello Robert, Thursday, November 2, 2006, 5:12:37 PM, you wrote:
RM> Hello zfs-discuss, RM> Server: x4500, 2x Opetron 285 (dual-core), 16GB RAM, 48x500GB RM> filebench/randomread script, filesize=256GB RM> 2 disks for system, 2 disks as hot-spares, atime set to off for a RM> pool, cache_bshift set to 8K (2^13), recordsize untouched (default). RM> pool: 4x raid-z (5 disks) + 4x raid-z (6 disks) means that one pool RM> was created wit 4 raid-z1 groups each with 5 disks and another 4 RM> raid-z1 groups each with 6 disks. RM> 1. pool: 4x raid-z (5 disks) + 4x raid-z (6 disks) RM> (36 disks of usable space) RM> a. nthreads = 1 ~60 ops RM> b. nthreads = 4 ~250 ops RM> c. nthreads = 8 ~520 ops RM> d. nthreads = 128 ~1340 ops RM> 1340/8 = 167 ops RM> Now the same pool config but actual RAID-5 is done using SVM and zfs just does striping between SVM R5 devices. with nthreads=128 I get ~3680 ops which is almost 3x as much as with raid-z. I don't like this config but maybe it's a better way to go than with raid-z after all - at least with some environments. ps. however creating large file is about 4x slower than on raid-z -- 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
