Re: What to do with 6 disks?
От | Jim C. Nasby |
---|---|
Тема | Re: What to do with 6 disks? |
Дата | |
Msg-id | 20050420015558.GY58835@decibel.org обсуждение исходный текст |
Ответ на | What to do with 6 disks? (Jeff Frost) |
Список | pgsql-performance |
Дерево обсуждения
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Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Alex Turner, )
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Re: How to improve db performance with $7K? ("Jim C. Nasby", )
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Re: Follow-Up: How to improve db performance with $7K? (Thomas F.O'Connell, )
Re: Follow-Up: How to improve db performance with $7K? (Kevin Brown, )
Re: Follow-Up: How to improve db performance with $7K? ("Steinar H. Gunderson", )
Re: Follow-Up: How to improve db performance with $7K? (Thomas F.O'Connell, )
Re: Follow-Up: How to improve db performance with $7K? (Vivek Khera, )
Re: Follow-Up: How to improve db performance with $7K? (Will LaShell, )
Re: How to improve db performance with $7K? (Steve Poe, )
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Re: How to improve db performance with $7K? (Alex Turner, )
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Re: How to improve db performance with $7K? (Alex Turner, )
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Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? ("Jim C. Nasby", )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Alex Turner, )
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Re: How to improve db performance with $7K? (Alex Turner, )
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Re: How to improve db performance with $7K? (Greg Stark, )
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Re: How to improve db performance with $7K? (Tom Lane, )
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Re: How to improve db performance with $7K? (Greg Stark, )
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Re: How to improve db performance with $7K? (Vivek Khera, )
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Re: How to improve db performance with $7K? ("Jim C. Nasby", )
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Re: How to improve db performance with $7K? (Kevin Brown, )
Re: How to improve db performance with $7K? (Greg Stark, )
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Re: How to improve db performance with $7K? (Alex Turner, )
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Re: How to improve db performance with $7K? ("Douglas J. Trainor", )
Re: How to improve db performance with $7K? (, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (, )
Re: How to improve db performance with $7K? ("Douglas J. Trainor", )
Re: How to improve db performance with $7K? (PFC, )
Re: How to improve db performance with $7K? (Alan Stange, )
Re: How to improve db performance with $7K? (Dave Cramer, )
Re: How to improve db performance with $7K? ("Alexander Kirpa", )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
Re: How to improve db performance with $7K? ("Matthew Nuzum", )
Re: How to improve db performance with $7K? (Greg Stark, )
Re: How to improve db performance with $7K? (PFC, )
Re: How to improve db performance with $7K? (Tom Lane, )
Re: How to improve db performance with $7K? ("Dave Held", )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
Re: How to improve db performance with $7K? (Steve Poe, )
Re: How to improve db performance with $7K? ("Joshua D. Drake", )
Re: How to improve db performance with $7K? (William Yu, )
Re: How to improve db performance with $7K? (Greg Stark, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Greg Stark, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Jacques Caron, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Jacques Caron, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Jacques Caron, )
Re: How to improve db performance with $7K? (Greg Stark, )
Re: How to improve db performance with $7K? (Alan Stange, )
Re: How to improve db performance with $7K? (John A Meinel, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? ("Joshua D. Drake", )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Steve Poe, )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (Jacques Caron, )
Re: How to improve db performance with $7K? ("Jim C. Nasby", )
Re: How to improve db performance with $7K? (William Yu, )
Re: How to improve db performance with $7K? ("Dave Held", )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
Re: How to improve db performance with $7K? ("Dave Held", )
Re: How to improve db performance with $7K? ("Jim C. Nasby", )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
Re: How to improve db performance with $7K? ("Jim C. Nasby", )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? ("Dave Held", )
Re: How to improve db performance with $7K? (Alex Turner, )
Re: How to improve db performance with $7K? (William Yu, )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
Re: How to improve db performance with $7K? (Bruce Momjian, )
Re: How to improve db performance with $7K? (, )
Re: How to improve db performance with $7K? ("Jim C. Nasby", )
What to do with 6 disks? (Jeff Frost, )
Re: What to do with 6 disks? ("Jim C. Nasby", )
Re: What to do with 6 disks? (Josh Berkus, )
Re: Opteron vs Xeon (Was: What to do with 6 disks?) (Jeff Frost, )
Re: Opteron vs Xeon (Was: What to do with 6 disks?) ("J. Andrew Rogers", )
Re: Opteron vs Xeon (Was: What to do with 6 disks?) (Jeff Frost, )
Re: Opteron vs Xeon (Was: What to do with 6 disks?) (William Yu, )
Re: Opteron vs Xeon (Was: What to do with 6 disks?) (Vivek Khera, )
Re: What to do with 6 disks? (Vivek Khera, )
Re: What to do with 6 disks? (William Yu, )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
Re: How to improve db performance with $7K? (Bruce Momjian, )
Re: How to improve db performance with $7K? (Dawid Kuroczko, )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
Re: How to improve db performance with $7K? ("Dave Held", )
Re: How to improve db performance with $7K? ("Mohan, Ross", )
http://stats.distributed.net is setup with the OS, WAL, and temp on a RAID1 and the database on a RAID10. The drives are 200G SATA with a 3ware raid card. I don't think the controller has battery-backed cache, but I'm not sure. In any case, it's almost never disk-bound on the mirror; when it's disk-bound it's usually the RAID10. But this is a read-mostly database. If it was write-heavy, that might not be the case. Also, in general, I see very little disk activity from the OS itself, so I don't think there's a large disadvantage to having it on the same drives as part of your database. I would recommend different filesystems for each, though. (ie: not one giant / partition) On Tue, Apr 19, 2005 at 06:00:42PM -0700, Jeff Frost wrote: > Now that we've hashed out which drives are quicker and more money equals > faster... > > Let's say you had a server with 6 separate 15k RPM SCSI disks, what raid > option would you use for a standalone postgres server? > > a) 3xRAID1 - 1 for data, 1 for xlog, 1 for os? > b) 1xRAID1 for OS/xlog, 1xRAID5 for data > c) 1xRAID10 for OS/xlong/data > d) 1xRAID1 for OS, 1xRAID10 for data > e) ..... > > I was initially leaning towards b, but after talking to Josh a bit, I > suspect that with only 4 disks the raid5 might be a performance detriment > vs 3 raid 1s or some sort of split raid10 setup. > > -- > Jeff Frost, Owner <> > Frost Consulting, LLC http://www.frostconsultingllc.com/ > Phone: 650-780-7908 FAX: 650-649-1954 > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faq > -- Jim C. Nasby, Database Consultant Give your computer some brain candy! www.distributed.net Team #1828 Windows: "Where do you want to go today?" Linux: "Where do you want to go tomorrow?" FreeBSD: "Are you guys coming, or what?"
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