Re: [GENERAL] RAID 5 and postgresql

2006-01-24 Thread Sander Steffann
Hi, > How about software RAID? > > Linux software RAID appears to perform better than most RAID > controllers except perhaps those that can do read interleaving > for RAID1 (I believe some 3ware controllers can do it). Linux > RAID mirroring doesn't do read interleaving, only read > balancing, w

Re: [GENERAL] RAID 5 and postgresql

2006-01-23 Thread Vivek Khera
On Jan 21, 2006, at 8:09 AM, Sander Steffann wrote: Dell has used (and rebranded) Adaptec and LSI controllers for their PERC series, and I agree that the Adaptec controllers perform badly. As far as I know the LSI based controllers are quite good (and some come with 256MB battery backed ca

Re: [GENERAL] RAID 5 and postgresql

2006-01-23 Thread Lincoln Yeoh
At 10:01 AM 1/23/2006 -0600, Scott Marlowe wrote: I'm not sure if it's Dell's BIOS on the mobos, or something with the LSI cards, but the performance was substandard. So if you're working somewhere that you simply have to use Dell (not uncommon), at least make sure you get the LSI based RAID co

Re: [GENERAL] RAID 5 and postgresql

2006-01-23 Thread Scott Marlowe
On Sat, 2006-01-21 at 07:09, Sander Steffann wrote: > Hi, > > > I would suppliment this with just saying that your controller card is > > your performance, > > the only cards I've seen score well on linux, and people have > > expressed on this list for SCSI are the LSI card, for SATA, LSI, 3ware >

Re: [GENERAL] RAID 5 and postgresql

2006-01-21 Thread Sander Steffann
Hi, I would suppliment this with just saying that your controller card is your performance, the only cards I've seen score well on linux, and people have expressed on this list for SCSI are the LSI card, for SATA, LSI, 3ware (now AMCC) and Areca claim good linux support and seem to work well. St

Re: [GENERAL] RAID 5 and postgresql

2006-01-18 Thread Alex Turner
I would suppliment this with just saying that your controller card is your performance, the only cards I've seen score well on linux, and people have expressed on this list for SCSI are the LSI card, for SATA, LSI, 3ware (now AMCC) and Areca claim good linux support and seem to work well. Steer ful

Re: [GENERAL] RAID 5 and postgresql

2006-01-18 Thread Scott Marlowe
On Wed, 2006-01-18 at 10:46, Hrishikesh Deshmukh wrote: > Hi All, > > Are there any pointers for RAID tuning (RAID5) with PostgreSQL 8.0?! There's a bi monthly conversation on this subject here and in the perform list. I'd recommend searching the perform list on the subject. Here's the short ve