On Sun, 2006-10-01 at 08:09 -0700, Kirk Bocek wrote: > > Francois Caen wrote: > > On 9/30/06, Kirk Bocek <t004 at kbocek.com> wrote: > >> Whoa! Block writes jumped to 130MB/Sec with no other changes. XFS Rocks! > > > > Too bad it's not supported and QA'd by the upstream vendor and > > therefore shouldn't be used in production on CentOS :-( > > > > Well hey! I think the downstream vendor rocks too! And it sounds like > centosplus has done some defacto QA too. :) > > Doing some further benchmarking, I added 'blockdev --setra 32768 /dev/sdb' to > my previous setup and ran a bunch of benchmarks overnight. The results: > > ------Sequential Output------ --Sequential Input- --Random- > -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- > Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP > Beryl 50G:256k 58911 93 198971 36 57194 8 47548 73 166183 14 62.2 2 > Beryl 50G:256k 60773 94 196980 36 56325 8 47719 74 166580 14 61.8 2 > Beryl 50G:256k 59977 94 187017 36 55981 8 47975 74 165562 14 64.0 2 > Beryl 50G:256k 60193 94 196472 36 56896 8 47913 74 166449 14 63.0 2 > Beryl 50G:256k 59802 94 201524 38 56746 8 48084 75 168710 14 64.7 1 > Beryl 50G:256k 60677 94 199188 37 52997 7 47682 74 163131 15 64.0 2 > Beryl 50G:256k 60061 94 191342 37 55949 9 47794 74 165348 15 64.3 2 > Beryl 50G:256k 60261 94 184231 35 56235 8 48090 74 166860 14 61.8 2 > ------Sequential Create------ --------Random Create-------- > -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- > files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP > Beryl 16 3597 17 +++++ +++ 4088 18 3101 15 +++++ +++ 856 4 > Beryl 16 3240 16 +++++ +++ 4561 20 3030 15 +++++ +++ 755 3 > Beryl 16 3039 14 +++++ +++ 4446 20 3111 15 +++++ +++ 754 3 > Beryl 16 3317 16 +++++ +++ 4509 21 2978 15 +++++ +++ 767 3 > Beryl 16 5037 25 +++++ +++ 4801 20 3349 17 +++++ +++ 891 4 > Beryl 16 3390 16 +++++ +++ 3341 14 3222 17 +++++ +++ 806 3 > Beryl 16 3547 17 +++++ +++ 3700 16 2986 15 +++++ +++ 799 4 > Beryl 16 3556 18 +++++ +++ 3183 13 3391 17 +++++ +++ 863 4 > > Block writes are still close to 200MB/Sec but block reads still haven't > changed from 166MB/Sec. :( > > Anyone have any thoughts on increasing read speed other than using blockdev? > If you are using XFS ... make sure to use the standalone modules and not the versions with XFS compiled into the kernel. The standalone modules are much newer code from SGI. I would also recommend using the x86_64 arch if it can be used as the x86_64 kernel is more stable w/XFS due to the 4K stacks issue that sometimes causes problems with the i386 arch. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: This is a digitally signed message part URL: <http://lists.centos.org/pipermail/centos/attachments/20061001/4194e588/attachment-0005.sig>