| From: | Craig James <craig_james(at)emolecules(dot)com> |
|---|---|
| To: | Laszlo Nagy <gandalf(at)shopzeus(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Choosing a filesystem |
| Date: | 2008-09-11 19:53:36 |
| Message-ID: | 48C97740.9040404@emolecules.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
Laszlo Nagy wrote:
> I cannot spend more money on this computer, but since you are all
> talking about battery back up, I'll try to get money from the management
> and buy this:
>
> Intel® RAID Smart Battery AXXRSBBU3, optional battery back up for use
> with AXXRAK18E and SRCSAS144E. RoHS Complaint.
The battery-backup is really important. You'd be better off to drop down to 8 disks in a RAID 1+0 and put everything on it, if that meant you could use the savings to get the battery-backed RAID controller. The performance improvement of a BB cache is amazing.
Based on advice from this group, configured our systems with a single 8-disk RAID 1+0 with a battery-backed cache. It holds the OS, WAL and database, and it is VERY fast. We're very happy with it.
Craig
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