Re: [gentoo-amd64] Re: Is my RAID performance bad possibly due to starting sector value?

[Mark Knecht]

On Fri, Jun 21, 2013 at 10:56 AM, Bob Sanders <rsanders@×××.com> wrote:
> Mark Knecht, mused, then expounded:
>> On Fri, Jun 21, 2013 at 12:31 AM, Duncan <1i5t5.duncan@×××.net> wrote:
>> > Mark Knecht posted on Thu, 20 Jun 2013 12:10:04 -0700 as excerpted:
>> >
>>
>> Basic Machine - ASUS Rampage II Extreme motherboard (4/1/2010) + 24GB
>> DDR3 + Core i7-980x Extreme 12 core processor
>
> The hit to iop performance is mainly due to the large number of cores in
> the the high end Intel cpu.  I suggest you find a nice 4-core Intel
> processor, something non-extreme.  you'll find all your IO will improve.
>

Interesting point but not likely to happen. I run 3 Windows VMs all
day, most of which are doing numerical calculations and not a huge
amount of IO in the Windows environment itself. In my usage model the
12 cores get a workout nearly every day.

>
>> 1 SDD - 120GB SATA3 on it's own controller
>> 5+ HDD - WD5002ABYS RAID Edition 3 SATA3 drives using Intel integrated
>> controllers
>>
>
> Again, if you're serious about RAID, get an LSI MegaRAID card.  While I
> have my dislikes about the LSI controller, it's a lot faster than using
> MD and much faster (and more reliable) than any bios software RAID.
>

I suppose if I accept your assertion above then an LSI MegaRAID might
be a better solution specifically because I _am_ using the 12 core
Extreme processor.

Will consider, at least in the long run, if this thread & work doesn't
yield significantly improved results over the next few weeks.

> Oh, and don't believe all the published numbers on drives,
> etc...benchmarking is an art.
>
> Bob

Absolutely! :-)

Thanks,
Mark