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From Paul Jans <paulfj...@yahoo.com>
Subject Re: Newbie questions
Date Mon, 14 Feb 2005 19:40:46 GMT
Hi again,

So is SqlDirectory recommended for use in a cluster to
workaround the accessibility problem, or are people
using NFS or a standalone server instead?

Thanks in advance,
PJ

--- Paul Jans <paulfjans@yahoo.com> wrote:

> I've already ordered Lucene in Action :)
> 
> > There is a LuceneRAR project that is still in its
> > infancy here: 
> > https://lucenerar.dev.java.net/
> 
> I will keep an eye on that for sure.
> 
> > You can also store a Lucene index in Berkeley DB
> > (look at the 
> > /contrib/db area of the source code repository)
> 
> We're already using Oracle, so would it be possible
> to
> store the index there, thus giving each cluster node
> easy access to it. I read about SqlDirectory in the
> archives but it looks like it didn't make it to the
> API and I don't see it on the contrib page.
> 
> I'm more concerned about making the index accessible
> rather than transactional consistency, so NFS may be
> another option like you mention. I'm curious to hear
> about other systems which are clustered and how
> others
> are doing this; lessons learnt and best practices
> etc.
> 
> Thanks again for the help. Lucene looks like a first
> class tool.
> 
> PJ
> 
> --- Erik Hatcher <erik@ehatchersolutions.com> wrote:
> 
> > 
> > On Feb 10, 2005, at 5:00 PM, Paul Jans wrote:
> > > A couple of newbie questions. I've searched the
> > > archives and read the Javadoc but I'm still
> having
> > > trouble figuring these out.
> > 
> > Don't forget to get your copy of "Lucene in
> Action"
> > too :)
> > 
> > > 1. What's the best way to index and handle
> queries
> > > like the following:
> > >
> > > Find me all users with (a CS degree and a GPA >
> > 3.0)
> > > or (a Math degree and a GPA > 3.5).
> > 
> > Some suggestions:  index degree as a Keyword
> field. 
> > Pad GPA, so that 
> > all of them are the form #.# (or #.## maybe). 
> > Numerics need to be 
> > lexicographically ordered, and thus padded.
> > 
> > With the right analyzer (see the AnalysisParalysis
> > page on the wiki) 
> > you could use this type of query with
> QueryParser:'
> > 
> > 	degree:cs AND gpa:[3.0 TO 9.9]
> > 
> > > 2. What are the best practices for using Lucene
> in
> > a
> > > clustered J2EE environment? A standalone
> > index/search
> > > server or storing the index in the database or
> > > something else ?
> > 
> > There is a LuceneRAR project that is still in its
> > infancy here: 
> > https://lucenerar.dev.java.net/
> > 
> > You can also store a Lucene index in Berkeley DB
> > (look at the 
> > /contrib/db area of the source code repository)
> > 
> > However, most projects do fine with "cruder"
> > techniques such as sharing 
> > the Lucene index on a common drive and ensuring
> that
> > locking is 
> > configured to use the common drive also.
> > 
> > 	Erik
> > 
> > 
> >
>
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> > 
> 
> 
> 
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