On Thu, 1 Jul 2004, Greg Pulfer wrote:
This made me wonder if I really need the MURDER functionality... First of all can someone exlain me what is a "uniform namespace (no shared mailboxes)", I am not sure if I need that or not. If I could use a IMAP proxy solution and that would make everything simplier I would go for it. Would I acheive the same horizontal scalability with an IMAP proxy solution as with a MURDER solution ?
Basicly, the "uniform namespace" refers to the fact that the aggregator allows any client to access any mailbox on the aggregator from a single connection to the proxies. Compare to a simpler solution, like Perdition, where once you have authenticated there is basicly a bitpipe to the correct backend (or worse -- dns based solution where users have to know what server their mailbox is on).
The proxy solution is better because (presumably) the proxy can handle pipelining clients better (as in, they don't take a performance hit as the proxy examines their commands). Likewise, it is conceivable that getting all of the necessary communications happening within the murder is much harder than just pointing a proxy at a database that maps usernames to hostnames.
At the time that the document to which you refer was written, it had also received substantially more testing, this is not really the case any longer.
Well to explain my case a bit I would like to install a mail architecture for an ISP which currently has approx 200 mailboxes but it will grow and grow and grow, that's why horizontal scalability is needed.
200 mailboxes is nothing. In your case I'd start with just a single imap machine, and decide how to grow later if you need that. If you start with cyrus, its probably about equivilantly easy to move to an aggregator system as it is to move to a normal proxy system.
-Rob
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Rob Siemborski * Andrew Systems Group * Cyert Hall 207 * 412-268-7456 Research Systems Programmer * /usr/contributed Gatekeeper
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