| From: | Vivek Khera <vivek(at)khera(dot)org> |
|---|---|
| To: | "Pgsql-Performance ((((E-mail))))" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: New hardware thoughts |
| Date: | 2006-10-23 21:30:19 |
| Message-ID: | 4A8627BA-2C0E-4857-8F28-0493C0D63933@khera.org |
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| Lists: | pgsql-performance |
On Oct 23, 2006, at 5:08 PM, Joshua D. Drake wrote:
>>
>> They don't randomly change the controllers under the same name.
>> If you
>> order a PERC4e/Si controller you will get the same controller every
>> time.
>
> Actually Vivek this isn't true. Yes the hardware will likely be the
> same, but the firmware rev will likely be different and I have seen
> firmware make an incredible difference for them.
Fair enough... but you don't expect LSI to never update their
firmware either, I suspect... not that I'm a big dell apologist..
they're totally off of my personally approved server vendor for db
servers.
>
>> This particular controller (found in their PE1850) is incredibly
>> fast, sustaining over 80Mb/sec writes to a mirror. I measured that
>> during a DB mirror using slony.
>
> O.k. but my experience shows that mirroring isn't where their problem
> is, raid 5 or 10 is :)
Like I said, for some configurations they're great! Finding those
configs is difficult.
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