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From Apostolis Xekoukoulotakis <xekou...@gmail.com>
Subject Re: Performance of storing data in Lucene vs other (No)SQL Databases
Date Mon, 21 May 2012 08:38:42 GMT
There is an IndexdocValue(renamed docvalues) in Lucene 4 which maps ids to
a value and has different characteristics that the inverted index.

If someone could answer my question as well ,
it entails using a k-v database for having personalized ranking(see
the previous
mail<http://mail-archives.apache.org/mod_mbox/lucene-java-user/201205.mbox/browser>
).
 I wish there was a way to provide an indexdocvalue
store with an external database, (for the cases that the values change per
user accessing the search engine).


2012/5/21 Li Li <fancyerii@gmail.com>

> what's your meaning of performance of storage?
> lucene just stores all fields of a document(or columns of a row if in
> db) together. it can only store string. you can't store int or long(
> except you convert it to string). to retrieve a given field of a
> document will cause many io operations. it's designed to perform fast
> full text search. it's not a k-v or other nosql db.
>
> On Mon, May 21, 2012 at 3:33 PM, Konstantyn Smirnov <injecteer@yahoo.com>
> wrote:
> > That's ok, but what is the real difference? Are there any performance
> tests?
> > I can assume, that up to 1 GB index size, there will be no noticeable
> > difference with stored fields in comparison with some MongoDB, but if the
> > index size grows?
> >
> > --
> > View this message in context:
> http://lucene.472066.n3.nabble.com/Performance-of-storing-data-in-Lucene-vs-other-No-SQL-Databases-tp3984704p3985043.html
> > Sent from the Lucene - Java Users mailing list archive at Nabble.com.
> >
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-- 


Sincerely yours,

     Apostolis Xekoukoulotakis

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