Unfortunately, I'm leaving for my vacation now, gone 3 weeks. When I'm back I'll run benchmarksql and bonnie++ and give the results here.
The spec I will be using:
Prolite DL585
2 x AMD/Opteron 64-bit 2,6GHZ
8G DDR PC3200
4 x 150G SCSI in SmartArray 5i
Running Gentoo 2006.0 AMD_64 Hardened kernel
Then I will remove the SmartArray 5i, and use a simple nonRAID SCSI controller and implement Linux software RAID, and re-run the tests.
I'll give signal in 3 weeks
- Kjell Tore.
On 7/28/06, Mikael Carneholm <Mikael.Carneholm@xxxxxxxxxxxxxxx> wrote:
Luke,
Yeah, I read those results, and I'm very disappointed with my results
from the MSA1500. I would however be interested in other people's
bonnie++ and benchmarksql results using a similar machine (2 cpu dual
core opteron) with other "off the shelf" storage systems
(EMC/Netapp/Xyratex/../). Could you run benchmarksql against that
machine with the 16 SATA disk and 3Ware 9550SX SATA RAID adapters? It
would be *very* interesting to see how the I/O performance correlates to
benchmarksql (postgres) transaction throughout.
/Mikael
-----Original Message-----
From: Luke Lonergan [mailto: LLonergan@xxxxxxxxxxxxx]
Sent: den 28 juli 2006 11:17
To: Mikael Carneholm; Kjell Tore Fossbakk;
pgsql-performance@xxxxxxxxxxxxxx
Subject: RE: [PERFORM] Performance with 2 AMD/Opteron 2.6Ghz and 8gig
Mikael,
> -----Original Message-----
> From: Mikael Carneholm [mailto:Mikael.Carneholm@xxxxxxxxxxxxxxx]
> Sent: Friday, July 28, 2006 2:05 AM
>
> My bonnie++ results are found in this message:
> http://archives.postgresql.org/pgsql-performance/2006-07/msg00164.php
>
Apologies if I've already said this, but those bonnie++ results are very
disappointing. The sequential transfer rates between 20MB/s and 57MB/s
are slower than a single SATA disk, and your SCSI disks might even do
80MB/s sequential transfer rate each.
Random access is also very poor, though perhaps equal to 5 disk drives
at 500/second.
By comparison, we routinely get 950MB/s sequential transfer rate using
16 SATA disks and 3Ware 9550SX SATA RAID adapters on Linux.
On Solaris ZFS on an X4500, we recently got this bonnie++ result on 36
SATA disk drives in RAID10 (single thread first):
Version 1.03 ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr-
--Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec
%CP /sec %CP
thumperdw-i-1 32G 120453 99 467814 98 290391 58 109371 99 993344
94 1801 4
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 +++++ +++ +++++ +++ +++++ +++ 30850 99 +++++ +++
+++++ +++
Bumping up the number of concurrent processes to 2, we get about 1.5x
speed reads of RAID10 with a concurrent workload (you have to add the
rates together):
Version 1.03 ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec
%CP /sec %CP
thumperdw-i-1 32G 111441 95 212536 54 171798 51 106184 98 719472
88 1233 2
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 26085 90 +++++ +++ 5700 98 21448 97 +++++ +++
4381 97
Version 1.03 ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr-
--Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec
%CP /sec %CP
thumperdw-i-1 32G 116355 99 212509 54 171647 50 106112 98 715030
87 1274 3
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 26082 99 +++++ +++ 5588 98 21399 88 +++++ +++
4272 97
So that's 2500 seeks per second, 1440MB/s sequential block read, 212MB/s
per character sequential read.
- Luke
--
"Be nice to people on your way up because you meet them on your way down."
