[imp] How to generate load using imp

Michael M Slusarz slusarz at horde.org
Wed Feb 9 18:09:09 UTC 2011


Quoting Paul A Sand <pas at unh.edu>:

> Upside: it convinced me that our bottleneck wasn't "between" IMP
> and UW-IMAP, it was UW-IMAP. Even if you can't replace UW-IMAP
> yourself, you might be able to use the results to convince those
> other admins to do so.

The important thing to remember is that UW-IMAP was extremely tied  
into the spirit of IMAP4.  And the underlying idea of IMAP4 is that  
mail clients will connect once to the server and maintain that  
connection for an extended period of time.  Disconnected clients (of  
which webmail is a type) are inapposite of this thinking.  Extensions  
have been made to IMAP since this time to deal with this ever popular  
connection style (e.g. LEMONADE group), but UW-IMAP doesn't support  
these extensions and other features designed to speed access to  
disconnected clients (e.g. server-side caching).

IMP can work around some of these limitations internally.  However,  
IMP is limited to the amount of caching it can realistically do since  
it works under some fairly strict resource limitations (e.g. limited  
amount of memory due to the fact a single server may be handling  
tens/hundreds of IMP connections a second).

michael

-- 
___________________________________
Michael Slusarz [slusarz at horde.org]




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