Ian Mordey wrote:

>Thanks for the quick response. Do you think it's more sensible to 
>run cluebringer on each postfix box? My current design has two 
>dedicated boxes for cluebringer. Is this overkill?

Other have answered that, but in case you'd not realised - 
Cluebringer needs write access to the DB, it's not a read-only 
environment and you can't run two independent installations while 
accurately imposing quotas etc.

When using quotas and greylisting (just mentioning the two that come 
to mind), each message triggers one or more write operations to the 
DB. If you try and run two independent installation, then greylisting 
won't work properly, and each will allow the full quota of messages 
through (doubling your throughput if the load is balanced equally 
between two servers).

Apart from the race condition already mentioned by Nigel, the 
Cluebringer process itself can be run as many times as you like as 
long as they share one database. Since HA installations on the 
underlying DB are already a problem with known options - I'd just run 
a Cluebringer on each mail handler and let them share the same 
backend database.

On that, I notice that the package is now in Debian testing, and the 
package maintainers have split the daemon and gui into separate 
packages. Nice.

-- 
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.
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