Am 13.11.2009 um 14:57 schrieb Laszlo Nagy:
I was thinking about ARECA 1320 with 2GB memory + BBU.
Unfortunately, I cannot find information about using ARECA cards
with SSD drives.
They told me: currently not supported, but they have positive customer
reports. No date yet for implementation of the TRIM command in firmware.
...
My other option is to buy two SLC SSD drives and use RAID1. It would
cost about the same, but has less redundancy and less capacity.
Which is the faster? 8-10 MLC disks in RAID 6 with a good caching
controller, or two SLC disks in RAID1?
I just went the MLC path with X25-Ms mainly to save energy.
The fresh assembled box has one SSD for WAL and one RAID 0 with for
SSDs as table space.
Everything runs smoothly on a areca 1222 with BBU, which turned all
write caches off.
OS is FreeBSD 8.0. I aligned all partitions on 1 MB boundaries.
Next week I will install 8.4.1 and run pgbench for pull-the-plug-
testing.
I would like to get some advice from the list for testing the SSDs!
Axel
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chaos claudius
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