Locking is completely unused from IndexReader unless you do deletes or
change norms, so sharing a remote mounted index is just fine (except
for performance concerns).
If you're using 2.4, you should open your readers with readOnly=true.
Mike
Tomer Gabel wrote:
Ultimately it depends on your specific usage patterns. Generally
speaking, if
you have IndexReaders (and do not use their delete functionality)
you don't
need locking at all; you can use a no-op lock factory, in which case
you'll
pretty much only be constrained by your storage subsystem.
Kay Kay-3 wrote:
For one of our projects - we were planning to have the system of
multiple individual Lucene readers (just read-only instances and no
writes whatsoever ) in different physical machines having their
IndexReader-s warmed up from the same directory for the indices and
working on the same.
I was reading about locks (implemented as files) that Lucene uses
internally. I am just curious if using multiple readers would be a
feasible option here, all sharing the same index directory (across
NFS /
similar network mounted storage ) in terms of locking etc.
Would there be a performance hit ( ignoring the NFS related
performance
of course) that would hinder multiple readers to serve query search
simultaneously from the same set of index files.
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http://www.tomergabel.com Tomer Gabel
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