MTA (SMTP/POP) + LVS

Mike McLean mikem at redhat.com
Wed Apr 21 23:35:06 BST 2004


François Chenais wrote:
>>The simplest solution (although a bit of a hack) is to have the same mail
>>spool directory exported to all realservers. 
> 
> 
> Yes but it's not safe if the disk (or the server hosting the disk)
> brakes. 

Yes.  And the fallout is that generally this sort of RW activity does 
not work well with LVS.

When such things are required, one reasonable solution is to have a 
three tier setup where the lvs director load balances across multiple 
servers (in your case pop/imap), which access their data via a highly 
available shared filesystem/database.  Of course this requires more 
machines and more hardware.



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