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Re: Intel SRCS16 SATA raid?

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От:	Dave Held
Тема:	Re: Intel SRCS16 SATA raid?
Дата:	14 апреля 2005 г. , 17:43:57
Msg-id:	49E94D0CFCD4DB43AFBA928DDD20C8F9026184AF@asg002.asg.local (см: обсуждение, исходный текст)
Ответ на:	Intel SRCS16 SATA raid? (Greg Stark)
Ответы:	Re: Intel SRCS16 SATA raid? (Alex Turner) Re: Intel SRCS16 SATA raid? (Alex Turner)
Список:	pgsql-performance

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Intel SRCS16 SATA raid? (Greg Stark, 14 апреля 2005 г., 14:54:57 )
Re: Intel SRCS16 SATA raid? ("Mohan, Ross", 14 апреля 2005 г., 15:10:56 )
Re: Intel SRCS16 SATA raid? ("Joshua D. Drake", 14 апреля 2005 г., 18:25:15 )
Re: Intel SRCS16 SATA raid? (Marinos Yannikos, 15 апреля 2005 г., 11:16:17 )
Re: Intel SRCS16 SATA raid? (Alex Turner, 15 апреля 2005 г., 14:43:59 )
Re: Intel SRCS16 SATA raid? (somewhat OT) (Marinos Yannikos, 15 апреля 2005 г., 16:17:07 )
Re: Intel SRCS16 SATA raid? (, 14 апреля 2005 г., 16:22:46 )
Re: Intel SRCS16 SATA raid? (Alex Turner, 14 апреля 2005 г., 17:01:45 )
Re: Intel SRCS16 SATA raid? (Alex Turner, 14 апреля 2005 г., 17:13:55 )
Re: Intel SRCS16 SATA raid? (, 14 апреля 2005 г., 17:50:50 )
Re: Intel SRCS16 SATA raid? (Bruce Momjian, 12 мая 2005 г., 02:26:57 )
Re: Intel SRCS16 SATA raid? ("Dave Held", 14 апреля 2005 г., 17:43:57 )
Re: Intel SRCS16 SATA raid? (Alex Turner, 14 апреля 2005 г., 22:44:02 )
Re: Intel SRCS16 SATA raid? (Alex Turner, 14 апреля 2005 г., 23:15:33 )
Re: Intel SRCS16 SATA raid? (Geoffrey, 15 апреля 2005 г., 01:38:25 )
Re: Intel SRCS16 SATA raid? ("Dave Held", 15 апреля 2005 г., 13:40:26 )
Re: Intel SRCS16 SATA raid? (, 15 апреля 2005 г., 14:21:34 )
Re: Intel SRCS16 SATA raid? (Alex Turner, 15 апреля 2005 г., 15:02:14 )
Re: Intel SRCS16 SATA raid? (, 15 апреля 2005 г., 15:21:57 )
Re: Intel SRCS16 SATA raid? (Vivek Khera, 15 апреля 2005 г., 15:52:52 )
Re: Intel SRCS16 SATA raid? (Alex Turner, 15 апреля 2005 г., 16:08:08 )
Re: Intel SRCS16 SATA raid? ("Dave Held", 15 апреля 2005 г., 15:09:53 )

> -----Original Message-----
> From: Alex Turner [mailto:]
> Sent: Thursday, April 14, 2005 12:14 PM
> To: 
> Cc: Greg Stark; ;
> 
> Subject: Re: [PERFORM] Intel SRCS16 SATA raid?
>
>
> I have put together a little head to head performance of a 15k SCSI,
> 10k SCSI 10K SATA w/TCQ, 10K SATA wo/TCQ and 7.2K SATA drive
> comparison at storage review
>
> http://www.storagereview.com/php/benchmark/compare_rtg_2001.ph
> p?typeID=10&testbedID=3&osID=4&raidconfigID=1&numDrives=1&devI
> D_0=232&devID_1=40&devID_2=259&devID_3=267&devID_4=261&devID_5
> =248&devCnt=6
>
> It does illustrate some of the weaknesses of SATA drives, but all in
> all the Raptor drives put on a good show.
> [...]

I think it's a little misleading that your tests show 0ms seek times
for some of the write tests.  The environmental test also selects a
missing data point as the winner.  Besides that, it seems to me that
seek time is one of the most important features for a DB server, which
means that the SCSI drives are the clear winners and the non-WD SATA
drives are the embarrassing losers.  Transfer rate is import, but
perhaps less so because DBs tend to read/write small blocks rather
than large files.  On the server suite, which seems to me to be the
most relevant for DBs, the Atlas 15k spanks the other drives by a
fairly large margin (especially the lesser SATA drives).  When you
ignore the "consumer app" benchmarks, I wouldn't be so confident in
saying that the Raptors "put on a good show".

__
David B. Held
Software Engineer/Array Services Group
200 14th Ave. East,  Sartell, MN 56377
320.534.3637 320.253.7800 800.752.8129

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