I don't really know of an "easy" way to do this (so I hope some others provide
better answers), but here's some ideas:

1) If you've been keeping documentation on what fields are read from each data
source, and what fields might be created in any customized pipeline
stages, review it to identify the ones that are needed.  Whatever fields are
left over are candidates for removal.  Take that list and compare it to the
fields that are in the default Index Profile, removing from the list any fields
that there.  This should give you a list of fields that can be removed.
2) You could write a script that steps through each field in the Index Profile
doing a wildcard query.  Any field that returns no results might be removable. 
This won't catch all of them -- for example, a field set to be returned in
results only (i.e. not indexed) doesn't get analyzed using this method.  But it
will catch some of them.
3) This one's highly unlikely.  But I worked with one client where we used
source code generation techniques to build code that wrapped both the query API
and the content API.  Thus, any field that was needed by the code would generate
an error in the dev's IDE if the Index Profile didn't include it.  So we walked
through a few iterations of trying different Index Profiles, until we got the
smallest one that didn't generate any errors.  Of course, this method won't work
unless you're doing some of the heavy customization that this one client was.
4) Drop a special "spy" stage at the end of each pipeline that is used.  Re-feed
data.  Then write a script analyzing the "spy" stage output to identify all
fields that are used.

Hopefully others will be able to contribute ideas.

Regards,
Garth Grimm
Avery Ranch Consulting
 ------------------------
All things can be solved by salt water:
sweat, tears, or the sea



----- Original Message ----
From: pgupta_1623 <dasgupta.patrick@...>
To: fast_dev@yahoogroups.com
Sent: Fri, January 21, 2011 6:42:49 AM
Subject: [fast_dev] get fields which are not used in any collection

Hi all,

we have deployed fast esp 5.1 since some years and have several collections
which share a single index-profile.


What is the easiest way to get all fields which are not in used in any
collection?

Thanks,
Patrick



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