Re: dell versus hp
От | Jeff Frost |
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Тема | Re: dell versus hp |
Дата | |
Msg-id | Pine.LNX.4.64.0711141815050.30192@discord.home.frostconsultingllc.com обсуждение исходный текст |
Ответ на | Re: dell versus hp ("Merlin Moncure" <mmoncure@gmail.com>) |
Ответы |
Re: dell versus hp
(Jeff Trout <threshar@torgo.978.org>)
|
Список | pgsql-performance |
On Wed, 14 Nov 2007, Merlin Moncure wrote: > On Nov 14, 2007 5:24 PM, Alan Hodgson <ahodgson@simkin.ca> wrote: >> On Tuesday 13 November 2007, Jeff Frost <jeff@frostconsultingllc.com> wrote: >>> Ok, Areca ARC1261ML. Note that results were similar for an 8 drive RAID6 >>> vs 8 drive RAID10, but I don't have those bonnie results any longer. >>> >>> Version 1.03 ------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 14xRAID6 63G 73967 99 455162 58 164543 23 77637 99 >>> 438570 31 912.2 1 ------Sequential Create------ --------Random >>> Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- >>> -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec >>> %CP 16 12815 63 +++++ +++ 13041 61 12846 67 +++++ +++ 12871 59 >>> >>> >>> Version 1.03 ------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 14xRAID10 63G 63968 92 246143 68 140634 30 77722 99 >>> 510904 36 607.8 0 ------Sequential Create------ --------Random >>> Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- >>> -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec >>> %CP 16 6655 16 +++++ +++ 5755 12 7259 17 +++++ +++ 5550 12 >> >> OK, impressive RAID-6 performance (not so impressive RAID-10 performance, >> but that could be a filesystem issue). Note to self; try an Areca >> controller in next storage server. > > 607 seeks/sec on a 8 drive raid 10 is terrible...this is not as > dependant on filesystem as sequential performance... Then this must be horrible since it's a 14 drive raid 10. :-/ If we had more time for the testing, I would have tried a bunch of RAID1 volumes and used software RAID0 to add the +0 bit and see how that performed. Merlin, what sort of seeks/sec from bonnie++ do you normally see from your RAID10 volumes? On an 8xRAID10 volume with the smaller Areca controller we were seeing around 450 seeks/sec. -- Jeff Frost, Owner <jeff@frostconsultingllc.com> Frost Consulting, LLC http://www.frostconsultingllc.com/ Phone: 650-780-7908 FAX: 650-649-1954
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