[CentOS] [Semi-OT] Advice on large webmail setup
Les Mikesell
lesmikesell at gmail.com
Thu Feb 15 16:16:21 UTC 2007
Jure Pečar wrote:
>
>> *shudder* That may be so in terms of performance, but what about
>> reliability and longevity? Given RH's treatment of non-ext3 FSs (and
>> reiserfs's murky future in general), I'd be *very* hesitant to use
>> reiserfs for anything.
>
> As long as your hw is ok, reiserfs works (>=2.4.18, dont know about 2.6). When you get a noncorrected bitflip in memory, it tends to propagate down to fs and make a nonnoticeable or huge disaster, depending on where it lands. That's true for all filesystems, see:
> http://www.cs.wisc.edu/adsl/Publications/iron-sosp05.pdf
>
> Solaris10 ZFS is immune to that thanks to its cheksumming.
I think it is a lot to ask from a filesystem to fix memory errors that
already happened in the buffer space before writing it out and I don't
have a lot of faith in that really working.
Anyway the 'old-school' way of handling a lot of mail users was to use a
NetApp filer with whatever number of mail servers you needed for the
user load doing NFS mounts and using maildir format to minimize the
locking issues. It should still be a sure bet.
--
Les Mikesell
lesmikesell at gmail.com
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