building a new fileserver
Eric Anderson
anderson at centtech.com
Fri Jan 19 17:22:41 UTC 2007
On 01/18/07 21:28, Kris Kennaway wrote:
> On Thu, Jan 18, 2007 at 09:51:56PM -0500, W. Josephson wrote:
>> I'd like to solicit people's opinions about configuring
>> CURRENT for a new fileserver that we'll be using internally.
>> I have only recently had hardware available for running anything
>> other than 6-STABLE so:
>>
>> 1. We'd like to use the 16-port 3Ware 9650SE-16.
>> Does anyone here have experience with this card in
>> RAID-6 mode under FreeBSD?
>>
>> 2. Any one have advice for setting up UFS+gjournal?
>> I've been using FFS+SU for some time on a number of machines
>> with filesystems up to about 1TB, but I'm not looking forward
>> to fsck, even background fsck, on multiple 10TB filesystems.
>> Does anyone here have experience with UFS+gjournal on large
>> filesystems? Are there any gotchas to be aware of when
>> configuring? Can someone describe briefly what guarantees
>> UFS+gjournal makes?
>
> One gotcha with gjournal is that there is apparently still at least
> one pretty obscure data corruption bug lurking. I see this when doing
> concurrent package builds on a 12 cpu system with a single gjournal
> data store, although I haven't run this configuration for a few
> months.
>
> Kris
As a data point, I've been using gjournal with two 10Tb file systems
(same host) for some time now, and it has been doing the job quite well.
I don't have nearly the number of CPU's as you, and I dedicate a
journal for each fs.
Eric
--
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Eric Anderson Sr. Systems Administrator Centaur Technology
An undefined problem has an infinite number of solutions.
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