Re: Dell Poweredge server and Postgres

On 06/07/2010 08:01 PM, Scott Marlowe wrote:
>
> Where I work we use these:
>
> http://www.pc-pitstop.com/sata_enclosures/scsas16rm.asp
>
> for when we need lots of throughput (file servers).  They allow four
> SAS connectors instead of the typical one or two.
>
> and will be using these:
>
> http://www.aberdeeninc.com/abcatg/kitjbod-1003.htm
>
> for our database servers, where IOPS is far more important than seq speed.
>
> My experience has been that the number of RAID controllers is no where
> near as important as the speed of said RAID controllers.  I'd rather
> have a very fast RAID controller handling 16 disks at once, than 4
> mediocre ones handling 4 disks each.  The optimal is to have two RAID
> controllers, so you have redundancy.  Most decent RAID controllers can
> run RAID-1 across the two and then RAID-0 over those RAID-1 pairs
> (either software or hardware, depending on OS and hardware
> performance).
>

I appreciate it.  I'll chat with management about these.  Thanks for the tip