From: | Adam Tauno Williams <awilliam(at)opengroupware(dot)us> |
---|---|
To: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: SATA drives performance |
Date: | 2009-12-24 22:18:44 |
Message-ID: | 32dvoje9bdro7qbjtvdmxmjk.1261693124335@email.android.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-performance |
This isn't true. IBMs IPS series controllers can the checked and configured via the ipssend utility that works very well in 2.6.x LINUX.
"Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com> wrote:
>On Thu, Dec 24, 2009 at 11:09 AM, Richard Neill <rn214(at)cam(dot)ac(dot)uk> wrote:
>>
>>
>> Jeremy Harris wrote:
>>>
>>> On 12/24/2009 05:12 PM, Richard Neill wrote:
>>>>
>>>> Of course, with a server machine, it's nearly impossible to use mdadm
>>>> raid: you are usually compelled to use a hardware raid card.
>>>
>>> Could you expand on that?
>>
>> Both of the last machines I bought (an IBM X3550 and an HP DL380) come with
>> hardware raid solutions. These are an utter nuisance because:
>>
>> - they can only be configured from the BIOS (or with a
>> bootable utility CD). Linux has very basic monitoring tools,
>> but no way to reconfigure the array, or add disks to empty
>> hot-swap slots while the system is running.
>>
>> - If there is a Linux raid config program, it's not part of the
>> main packaged distro, but usually a pre-built binary, available
>> for only one release/kernel of the wrong distro.
>>
>> - the IBM one had dodgy firmware, which, until updated, caused the
>> disk to totally fail after a few days.
>>
>> - you pay a lot of money for something effectively pointless, and
>> have less control and less flexibility.
>>
>> After my experience with the X3550, I hunted for any server that would ship
>> without hardware raid, i.e. connect the 8 SATA hotswap slots direct to the
>> motherboard, or where the hardware raid could be de-activated completely,
>> and put into pass-through mode. Neither HP nor IBM make such a thing.
>
>Yep. And that's why I never order servers from them. There are
>dozens of reputable white box builders (I use Aberdeen who give me a 5
>year all parts warranty and incredible customer service, but there are
>plenty to choose from) and they build the machine I ask them to build.
> For hardware RAID I use Areca 1680 series, and they also provide me
>with machines with software RAID for lighter loads (slave dbs,
>reporting dbs, and stats dbs)
>
>--
>Sent via pgsql-performance mailing list (pgsql-performance(at)postgresql(dot)org)
>To make changes to your subscription:
>http://www.postgresql.org/mailpref/pgsql-performance
--
Message composed using K-9 mail on Android.
Apologies for improper reply quoting (not supported) by client.
From | Date | Subject | |
---|---|---|---|
Next Message | Richard Neill | 2009-12-24 22:51:13 | Re: SATA drives performance |
Previous Message | Ognjen Blagojevic | 2009-12-24 21:09:41 | Re: SATA drives performance |