Re: Linux: more cores = less concurrency.

> -----Original Message-----
> From: Scott Marlowe [mailto:scott(dot)marlowe(at)gmail(dot)com]
> Sent: Monday, April 11, 2011 6:18 PM
> To: mark
> Cc: Glyn Astill; Kevin Grittner; Joshua D. Drake; pgsql-
> performance(at)postgresql(dot)org
> Subject: Re: [PERFORM] Linux: more cores = less concurrency.
>
> On Mon, Apr 11, 2011 at 6:05 PM, mark <dvlhntr(at)gmail(dot)com> wrote:
> > Just wondering, which LSI card ?
> > Was this 32 drives in Raid 1+0 with a two drive raid 1 for logs or
> some
> > other config?
>
> We were using teh LSI8888 but I'll be switching back to Areca when we
> go back to HW RAID. The LSI8888 only performed well if we setup 15
> RAID-1 pairs in HW and use linux SW RAID 0 on top. RAID1+0 in the
> LSI8888 was a pretty mediocre performer. Areca 1680 OTOH, beats it in
> every test, with HW RAID10 only. Much simpler to admin.

Interesting, thanks for sharing.

I guess I have never gotten to the point where I felt I needed more than 2
drives for my xlogs. Maybe I have been dismissing that as a possibility
something. (my biggest array is only 24 SFF drives tho)

I am trying to get my hands on a dual core lsi card for testing at work.
(either a 9265-8i or 9285-8e) don't see any dual core 6Gbps SAS Areca cards
yet....still rocking a Arcea 1130 at home tho.

-M