using Cyrus was Re: Re: Planning Mail Server (with low resources)

[feizhou at graffiti.net (Feizhou)]

Aleksandar Milivojevic wrote:
> Quoting Feizhou <feizhou@xxxxxxxxxxxx>:
> 
>> a courier-imap/dovecot box would only just have to access a SAN and 
>> that is all there is to clustering. Multiple courier-imap/dovecot 
>> boxes hitting a database for user info and mailbox location and then 
>> hitting the san for the files. simple.
> 
> 
> I think SAN is way out of reach of somebody who is left to build mail 
> server for
> 2000 users with only 40GB drive.

Whoa, we were on the topic of clustering...this thread is not quite all 
about the guy with 2k users anymore...
> 
> Anyhow, what if your SAN storage or NFS server goes down?  Your 
> mailboxes go
> down with it.  Hm, not much difference there.  You are just replacing one
> component that might fail, with another component that might equally 
> fail. This is a rahter complicated issue, and there is no single way to 
> implement it.

SAN != NFS. SAN's provide multiple paths to the data where data is 
mirrored across different disks and accessible through more than on channel.

> Courier works for some folks.  Cyrus works for some folks.  They are 
> both good.
> You choose one and after some time learn to live with its limitations.

I am out to find out those limitations and their environments.