Re: Benchmark: Dell/Perc 6, 8 disk RAID 10

On Mon, Mar 17, 2008 at 2:58 PM, Enrico Sirola <enrico.sirola@gmail.com> wrote:
> Hi Justin,
>
>  Il giorno 17/mar/08, alle ore 20:38, Justin ha scritto:
>
> > it is a RAID 10 controller with 6 SAS 10K 73 gig drives.    The
>  > server is 3 weeks old now.
>  >
>  > it has 16 gigs of RAM
>  > 2 quad core Xenon 1.88 Ghz processors
>  > 2 gig Ethernet cards. RAID controller perc 6/i with battery backup
>  > 512meg cache, setup not lie about fsync
>  >
>  > WAL is on a RAID 0 drive along with the OS
>
>  Did you try with a single raid 10 hosting DB + WAL? It gave me much
>  better performances on similar hardware
>  Bye,

Note that it can often be advantageous to have one big physical
partition on RAID-10 and to then break it into logical partitions for
the computer, so that you have a partition with just ext2 for the WAL
and since it has its own file system you usually get better
performance without having to actually hard partition out a separate
RAID-1 or RAID-10 for WAL.