On Wed, Nov 22, 2006 at 09:02:04AM -0800, Jeff Frost wrote:
A valid question. Does the caching raid controller negate the desire to
separate pg_xlog from PGDATA?
Theoretically, yes. But I don't think I've seen any hard numbers from
testing.
--
Jim Nasby
On Wed, Nov 22, 2006 at 04:35:37PM -0500, Bucky Jordan wrote:
While I'm at it, if I have time I'll run pgbench with pg_log on a
separate RAID1, and one with it on a RAID10x6, but I don't know how
useful those results will be.
Very, but only if the controller has write-caching enabled. For
Hi Luke,
I forgot about that article, thanks for that link. That's indeed a nice
overview of (in august) recent controllers. The Areca 1280 in that test
(and the results I linked to earlier) is a pre-production model, so it
might actually perform even better than in that test.
We've been
-Original Message-
From: [EMAIL PROTECTED]
[mailto:pgsql-performance-
[EMAIL PROTECTED] On Behalf Of Joshua D. Drake
Sent: Tuesday, November 21, 2006 9:38 PM
To: Jeff Frost
Cc: Luke Lonergan; pgsql-performance@postgresql.org
Subject: Re: [PERFORM] availability of SATA vendors
Don't count
On Wed, 22 Nov 2006, Bucky Jordan wrote:
Dells (at least the 1950 and 2950) come with the Perc5, which is
basically just the LSI MegaRAID. The units I have come with a 256MB BBU,
I'm not sure if it's upgradeable, but it looks like a standard DIMM in
there...
I posted some dd and bonnie++
On Wed, 2006-11-22 at 08:36 -0800, Jeff Frost wrote:
On Wed, 22 Nov 2006, Bucky Jordan wrote:
Dells (at least the 1950 and 2950) come with the Perc5, which is
basically just the LSI MegaRAID. The units I have come with a 256MB BBU,
I'm not sure if it's upgradeable, but it looks like a
On Wed, 22 Nov 2006, Joshua D. Drake wrote:
I could only find the 6 disk RAID5 numbers in the archives that were run with
bonnie++1.03. Have you run the RAID10 tests since? Did you settle on 6 disk
RAID5 or 2xRAID1 + 4XRAID10?
Why not 6 drive raid 10? IIRC you need 4 to start RAID 10 but
Jeff,
You can find some (Dutch) results here on our website:
http://tweakers.net/reviews/647/5
You'll find the AMCC/3ware 9550SX-12 with up to 12 disks, Areca 1280 and
1160 with up to 14 disks and a Promise and LSI sata-raid controller with
each up to 8 disks. Btw, that Dell Perc5 (sas) is
On Wed, 2006-11-22 at 09:02 -0800, Jeff Frost wrote:
On Wed, 22 Nov 2006, Joshua D. Drake wrote:
I could only find the 6 disk RAID5 numbers in the archives that were run
with
bonnie++1.03. Have you run the RAID10 tests since? Did you settle on 6
disk
RAID5 or 2xRAID1 + 4XRAID10?
On Wed, 2006-11-22 at 11:02, Jeff Frost wrote:
On Wed, 22 Nov 2006, Joshua D. Drake wrote:
I could only find the 6 disk RAID5 numbers in the archives that were run
with
bonnie++1.03. Have you run the RAID10 tests since? Did you settle on 6
disk
RAID5 or 2xRAID1 + 4XRAID10?
Why
I could only find the 6 disk RAID5 numbers in the archives that were
run
with
bonnie++1.03. Have you run the RAID10 tests since? Did you settle on
6
disk
RAID5 or 2xRAID1 + 4XRAID10?
Unfortunately most of the tests were run with bonnie 1.9 since they were
before I realized that people
Arjen,
As usual, your articles are excellent!
Your results show again that the 3Ware 9550SX is really poor at random I/O
with RAID5 and all of the Arecas are really good. 3Ware/AMCC have designed
the 96xx to do much better for RAID5, but I've not seen results - can you
get a card and test it?
On Fri, 17 Nov 2006, Luke Lonergan wrote:
Currently, I'm looking at Penguin, HP and Sun (though Sun's store isn't
working for me at the moment). Maybe I just need to order a Penguin and then
buy the controller separately, but was hoping to get support from a single
entity.
Rackable or
ASAcomputers has been the most helpful of all the vendors so far, so thanks
for point me at them. I know you've been posting results with the Areca and
3ware controllers, do you have a preference for one over the other? It seems
that you can only get 256MB cache with the 3ware 9550SX and
On Tue, 21 Nov 2006, Joshua D. Drake wrote:
ASAcomputers has been the most helpful of all the vendors so far, so thanks
for point me at them. I know you've been posting results with the Areca and
3ware controllers, do you have a preference for one over the other? It seems
that you can only
I see many of you folks singing the praises of the Areca and 3ware SATA
controllers, but I've been trying to price some systems and am having trouble
finding a vendor who ships these controllers with their systems. Are you
rolling your own white boxes or am I just looking in the wrong places?
On 17-11-2006 18:45 Jeff Frost wrote:
I see many of you folks singing the praises of the Areca and 3ware SATA
controllers, but I've been trying to price some systems and am having
trouble finding a vendor who ships these controllers with their
systems. Are you rolling your own white boxes or
Contact Pogo Linux, www.pogolinux.com. I believe they OEM and VAR
both Areca and 3ware in their systems.
3ware was bought out by AMCC, www.amcc.com
Areca cards are distributed in NA by Tekram, www.tekram.com, and are
available from them as solo items as well as in OEM storage systems.
On Nov 17, 2006, at 9:45 AM, Jeff Frost wrote:
I see many of you folks singing the praises of the Areca and 3ware
SATA controllers, but I've been trying to price some systems and am
having trouble finding a vendor who ships these controllers with
their systems. Are you rolling your own
Jeff,
On 11/17/06 11:45 AM, Jeff Frost [EMAIL PROTECTED] wrote:
I see many of you folks singing the praises of the Areca and 3ware SATA
controllers, but I've been trying to price some systems and am having trouble
finding a vendor who ships these controllers with their systems. Are you
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