cyrus replication : master to replica and replica to master

[David Touzeau]

Sujet: Re: cyrus replication : master to replica and replica to master
Date: Thu, 22 Oct 2009 15:20:09 +1100me


> Well - it's theoretically possible.  But I don't know anyone who's done
> it, and it has the potential to get ugly if you're delivering to the
> same mailboxes at each end.  There's nothing I can see that would
> actually stop it working.

>I think Bron failed to put sufficiently large warning signs here :)

>The difference between "in theory this would work" and the practice of 
>actually doing it are huge. Basically it works only if you are 100% sure 
>that only one side is ever being accessed at a time. eg. IMAP/POP/LMTP/etc. 
>If somehow you get an LTMP deliver to different ends, then one side will end 
>up overwriting the other.

>In other words, DON'T DO THIS.

>Rob


Thanks rob 
i'm very surprised that there is not really official point from cyrus-imap dev team against using cyrus in cluster active/active mode 
Since serverals years the messaging service become very important and the clustering system is the right way to provide a real fail over system 
After googlize i had read that  the only best method is to using drbd but there no really wikis and documentations about implementing this kind of structure.

I would like to restart this topic and discuss.

David




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