Not to rain on the parade as far as that replication document, as unison is
a great tool... but building a replicated spool for a large install won't
really scale due to how slow and heavy it is for unison to calculate the
hashes. It's great if the primary system doesn't have much load or a large
number of users, but as those both increase it would be less and less
viable.

For a large scale install you should look at a drbd or starfish type
filesystem cluster.

Justice London
Systems Administrator
E-mail:  jlon...@lawinfo.com

-----Original Message-----
From: Jake Vickers [mailto:j...@v2gnu.com] 
Sent: Monday, December 22, 2008 5:18 AM
To: qmailtoaster-list@qmailtoaster.com
Subject: Re: [qmailtoaster] Qmail cluster

Truong Duc Luong wrote:
> Hi Jake,
> I find on the wiki as below.
>
> http://wiki.qmailtoaster.com/index.php/Special:Search?search=cluster&go=Go
>
> No guide for setup qmail cluster.
>
> Anyone help me?
>
>   

You're looking for a failover setup, not a cluster:
http://wiki.qmailtoaster.com/index.php/QMT_Failover_replication_Setup
A cluster is several machines accepting mail and all sharing the same 
data.  We set those up as well.


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