Search: takes time of what order?

[Ken Murchison]

Ian McDonald wrote:
> 
> From: "Ken Murchison" <ken at oceana.com>
> >
> > Ian McDonald wrote:
> > >
> > > Hi,
> > >
> > > Does Cyrus do any indexing or other preparation to reduce the time taken
> to
> > > search large mail collections?
> >
> > Yes, if you create a "squat" index for it, by using the "squatter"
> > tool.  Since this only indexes messages currently in the mailbox, you
> > should setup squatter to be an EVENT in cyrus.conf, if the mailbox
> > constantly grows.
> 
> So a search on a "squat" index will miss messages added since the most
> recent execution of squatter?

No.  It will never miss messages.  If its not in the index, it'll search
the message file itself (as if there was no index at all).

> Should Cyrus have any problems executing a SEARCH on a hierarchy of folders,
> some of which have SQUAT indices and some cannot?

No.  SEARCH looks for a squat index first, and then falls back to the
"brute force" method.

> Can a SQUAT index be removed simply by deleting the files?

Yes.  Just delete cyrus.squat

> (In which case, I'm going to need to add a subroutine to Cyrus that will
> delete a squat index whenever a file changes; or a subroutine to the
> searches that will ignore indices older than the folder itself. Oh, for an
> API :). ).

Why would you want to remove them if your intention is to speed up
SEARCHes?

-- 
Kenneth Murchison     Oceana Matrix Ltd.
Software Engineer     21 Princeton Place
716-662-8973 x26      Orchard Park, NY 14127
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