Zitat von ram <r...@netcore.co.in>:

We need to design a mail system where postfix transport maps file will
grow based on the inputs. . This may grow to a million lines

I need to know what will be the max entries in transport map that the
machine can handle ( 4 GB Ram , Quad Xeon) .. given that the system is
running postfix and almost nothing else

How do I test the limits ?

Thanks
Ram

This is only dependant on the map-type you are using. If you have many updates you should using a "network" database type (not file based) like SQL or LDAP. Test the lookup times for the map-type of your choice with the patterns described in the manpages for transport and see what you get. Be aware that the lookup table for transport should be highly available because without transport lookups Postfix will stop working at all.

Regards

Andreas

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