[Zope] ZCatalog and Xron

[Luton, Alex]

I'm in the process of trying to build a reliable, accurate search engine
using a ZCatalog. In order to keep the catalog contents up to date, I
added an Xron method to reindex the catalog every hour. This worked fine
on a small site, but for a site with a catalog of 1300 documents the
data.fs file grows from a few hundred meg to several gig before long,
and apache/zope dies. Another problem is that Xron seems to trigger its
methods as many times as it 'missed' if the server is stopped for a
while.
I'm only indexing dtml documents, and the ZCatalog doesn't use any
metadata or special indexes.
Are there any ways to prevent the catalog updates being stored in the
ZODB, so no undo history is saved for the ZCatalog? 

Thanks

--
Alex
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