Re: tablespace on a SAN

From: Frank van Bortel <fvanbortel_at_netscape.net>
Date: Sun, 19 Dec 2004 20:48:26 +0100
Message-ID: <cq4ltk$l4u$1@news2.zwoll1.ov.home.nl>

Rick Denoire wrote:
> christianboivin1_at_hotmail.com wrote:
>
>

>>Hi,
>>
>>Does someone have try to put a tablespace on a SAN ?
>>i'm running 9.2.0.1.0 on win 2k and my database is growing
>>by 2gb by week
>>
>>There's some known problems about doing that ...
>>some restrictions, performance problems ... ?
>>
>>I plan to buy a SAN from DELL.
>>Thanks
>>(Sorry for my poor english ;-) )
>>
>>Chris

>
>
> Please DO NOT put any ATA Disks on a Dell/EMC Clariion.
>
> I use a CX400 using both FC/SCSI and ATA disks. It is a
> nightmare. Even the 15K FC/SCSI disks are slower (Raid group
> consisting of 9 disks) than the internal SCSI disks of the host.
>
> So I would say: Do not use any Dell/EMC array. And if you want to do a
> real performance test, switch the storage cache off.
>
> Bye
> Rick Denoire
>

Rick,
it might be worth changing your RAID controller. I have seen a HP/Compaq RAID controller being outperformed by a RLL (remember these?!?) controller). It was an entry line configuration, though (although not for entry line costs ... :( )

The very next step model RAID controller performed as expected.

Fail to see why ATA would influence (SCSI) RAID performance

-- 
Regards,
Frank van Bortel

Received on Sun Dec 19 2004 - 13:48:26 CST