Skip site navigation (1)
Skip section navigation (2)
Peripheral Links
Header And Logo
|
Site Navigation
Re: RAID controllers for Postgresql on large setups
- From: "Joshua D. Drake" <jd(at)commandprompt(dot)com>
- To: Chris Ruprecht <chris(at)ruprecht(dot)org>
- Cc: Francisco Reyes <lists(at)stringsutils(dot)com>, Pgsql performance <pgsql-performance(at)postgresql(dot)org>
- Subject: Re: RAID controllers for Postgresql on large setups
- Date: Mon, 12 May 2008 21:40:15 -0700
- Message-id: <48291BAF(dot)1040807(at)commandprompt(dot)com>
Chris Ruprecht wrote:
Joshua, did you try to run the 345 on an IBM ServeRAID 6i?
No the only controllers I had at the time were the 2120 and the LSI on board that is limited to RAID 1. I put the drives on the LSI in JBOD and used Linux software raid.
The key identifier for me was using a single writer over 6 (RAID 10) drives with the 2120 I could get ~ 16 megs a second. The moment I went to multiple writers it dropped exponentially.
However with software raid I was able to sustain ~ 16 megs a second over multiple threads. I stopped testing at 4 threads when I was getting 16 megs per thread :). I was happy at that point.
Joshua D. Drake
- References:
- RAID controllers for Postgresql on large setups
- From: Francisco Reyes
- Re: RAID controllers for Postgresql on large setups
- From: Joshua D. Drake
- Re: RAID controllers for Postgresql on large setups
- From: Chris Ruprecht
- RAID controllers for Postgresql on large setups
- Prev by Date: Re: RAID controllers for Postgresql on large setups
- Next by Date: Re: RAID controllers for Postgresql on large setups
- Previous by thread: Re: RAID controllers for Postgresql on large setups
- Next by thread: Re: RAID controllers for Postgresql on large setups
- Indexes: