On 09/03/2012 03:44, Da Rock wrote:
I'm reconsidering my current setup (postfix/courier) for imap and I
was doing some research on performance comparisons between imap server
setups. I stumbled on this article just just about fell of my chair
laughing when I read the last article on future benchmarking tests to
perform:
research.microsoft.com/pubs/138302/lisa.pdf
Considering I have close to a hundred folders or more, and an average
of 50,000 emails in each (yes, not good, and I am working on archiving
but it won't help _that_ much) with nearly 200,000 in just one! I got
a real kick out of the comment that "no sane email user would have
more than 21,000 emails in a folder" - that would make me certifiable
:D Oh, and that most email wouldn't be more than a GB or so... mine's
edging 6GB already...
So, all jokes aside, I contemplated that I would make an ideal test
case to the extreme for benchmarking imap servers. Anyone have any
suggestions on what to test/how? Anyone have some tools they have
created for a similar challenge? I have my own ideas, but if anyone
wants me to try something I'd be willing to give it a shot.
If anyone has a better idea on which list this should be posted to as
well - I considered the lists available (I'm hooked up to most) and
couldn't see any better.
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No IMAP test is as vicious or as thorough as a real life company
deciding to change its mail client from one day to the next and counting
on IMAP to automagically restore local archives. If the company more or
less uses IMAP folder as a share drives it is even better.
It happened to me once. Postfix/Dovecot did handle the change quite
well, yet some mailboxes took days before the local copy was in sync
with IMAP folders.
There was about 200GB of mail to download (35 users company) the load
average was under 0.25 all the time on an i5 dual core with 8GB of ram.
Duplicating a mailbox X times and having X clients doing a local copy of
the entire mailbox sounds like a good first test, with mailbox size and
number X on par with what you expect to find on your network.
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