Have tested it and yes it works.
I'm trying to prove that
(a) the jvm eats up more memory and [just to "prove" that it's
putting the index in ram]
(b) the queries are at least as fast as without using it, esp
when compared to
a, um, "hot" query (e.g. do same query 2x in a row, 1st
query presumably
lets lucene cache info, 2nd query is then "hot" and of
interest - if caching
works well could be same speed as RAMDirectory, would
never expect this
to be faster).
Am working w/ a 10MB index of around 15k "docs" [index formed from mysql
database].
Will try to report back on the above benchmark/proof - trying to quickly
reply
to Doug w/ a "yes it does work" in answer to his question below.
How to expose this code fragment: I'm in agreement w/ the ctr's below.
The "requirement" to satisfy would just be that it's easy to convert a
on-disk index into a RAMDirectory. The use case would be a search server
in which
you wanted to eat RAM to have fast responses.
-----Original Message-----
From: Doug Cutting [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 21, 2002 1:33 PM
To: 'Lucene Developers List'
Subject: RE: Converting a FSDirectory (on disk index) to a RAMDirectory
> From: Spencer, Dave [mailto:[EMAIL PROTECTED]]
>
> Could anyone glance at this and verify that this code is correct.
> Goal is to convert an existing, on-disk, index to a
> RAMDirectory, which presumably is purely in memory.
It looks right to me. Did you test it? Did it work?
> If the code is correct I'd suggest someone w/ CVS powers adding it to
> the source base - maybe a static method in RAMDirectory itself.
How about a RAMDirectory constructor? Since only generic Directory
methods
are required it could just be:
public RAMDirectory(Directory dirToCopy) { ... }
and, as conveniences:
public RAMDirectory(File f) { this(new FSDirectory(f)); }
public RAMDirectory(String s) { this(new FSDirectory(s)); }
Doug
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