Steve Fulton wrote:
>
> I've searched the archives extensively, and I've learned quite a lot, but
> I'd like advice on this question:
>
> Assuming RAID 1+0 is not an option (due to the expense), what level of
> RAID is best for storing /Maildir's on a file server (that will be
> accessible to the SMTP & POP servers via NFS). Redudancy is the big
> issue, otherwise I'd go for RAID 1. The suits are pushing for RAID 5
> because they don't know better - and won't listen.
>
> Steve.
Hi,
I wish point you a reference regarding SMTP & POP via NFS:
- I think NFS is a little slow and it locks the file-system which is not
a good idea in case the NFS server will go down for a while.
I have RAID 1 between two fail-over qmail servers
using NBD (network block device) and a local partition for each one.
In case one of my qmail-server is down the other will take care about
qmail service without any file-system unlock, just start its NBD service
and reconstructing the RAID 1 locally.
If you want more details about NBD go to:
- http://www.it.uc3m.es/~ptb/nbd/ <-- home-page
- http://lists.community.tummy.com/mailman/listinfo/enbd <-- mail-list
I think you can use RAID 5 and NBD too in case you lack in local disk controllers.
Regards,
--
Adrian Turcu
System Administrator
Computers Department
Romanian Railway Company
Constanta Region
E-mail: [EMAIL PROTECTED], [EMAIL PROTECTED]
Phone: +40 92 563791 (any time)
+40 43 363977 (home)
