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Re: Creating a Mhonarc archive from MS Outlook emails

I have 72,000 messages in a single mhonarc archive running on a dual xeon 800 MHz windows 2000 machine with 500 Meg of Ram. The result files include nearly 800 each thread, author and date index pages, along with the 72000 msg*.html files all in a single directory.

The last complete generate (back in Sept of '03) took 4 days. The _next_ version will be using the mharc project technqiues to chop it into bits.

Interestingly IIS, and Windows 2000 handle the large directory just fine, and responsiveness is not a problem. The system is PRIMARILY accessed by a Namazu search, which ALSO works fine, with sub-second response to any query.

Rick Boatright

Earl Hood wrote:

On March 15, 2004 at 16:49, "Lyle Schofield" wrote:

Side question -- are there any practical limits to the number of
messages MHonArc can convert into an archive? I've been testing in
batches of 350, and it only takes a few minutes on my laptop. But, if I
try to dump thousands of messages in there will I hit some limit of what
can be processed? Thanks in advance.

Scaling can be a problem if your resources are limitied. When MHonArc processes an archive, all the meta-information of the archive is loaded, so archive updates for large archives will slow down over time. Therefore, doing real-time updates (i.e. add messages right as they are received) of large archives should not be done to avoid bottleneck problems.

The general solution for dealing with a large archive is to
break it down into smaller archives denoted by fixed time
periods (like each week, month, or year).  The mharc project,
<http://www.mhonarc.org/mharc/> provides such capabilites, and other
users have developed their own (search the list archives).

If you are archives will grow to an indefinite size, then I highly
recommend going with the smaller sub-archive approach.


P.S.  I have heard of users that have had up to 60,000 messages in a
single archive.  But I think you need some decent hardware and RAM
to effectively work with such a beast.

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