On 11/24/09 11:13 AM, "Scott Marlowe" <scott.marlowe@xxxxxxxxx> wrote: > > They get good reviews as well. Both manufacturers have their "star" > performers, and their "utility" or work group class controllers. For > what you're doing the areca 12xx or 3ware 95xx series should do fine. > -1 to 3ware's SATA solutions 3ware 95xx and 96xx had performance somewhere between PERC 5 (horrid) and PERC 6 (mediocre) when I tested them with large SATA drives with RAID 10. Haven't tried raid 6 or 5. Haven't tried the "SA" model that supports SAS. When a competing card (Areca or Adaptec) gets 3x the sequential throughput on an 8 disk RAID 10 and only catches up to be 60% the speed after heavy tuning of readahead value, there's something wrong. Random access throughput doesn't suffer like that however -- but its nice when the I/O can sequential scan faser than postgres can read the tuples. > As far as drives go we've been really happy with WD of late, they make > large enterprise class SATA drives that don't pull a lot of power > (green series) and fast SATA drives that pull a bit more but are > faster (black series). We've used both and are quite happy with each. > We use a pair of blacks to build slony read slaves and they're very > fast, with write speeds of ~100MB/second and read speeds double that > in linux under sw RAID-1 > -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
