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From Otis Gospodnetic <otis_gospodne...@yahoo.com>
Subject Re: Disk I/O in Lucene
Date Wed, 10 Apr 2002 15:15:50 GMT

--- Donglin Lu <qlv@yahoo.com> wrote:
> 
> Hi, Peter.
> 
> Thanks for the information. I am curious why Lucene
> doesn't use the NIO API of JDK 1.4. It may improve the
> performance.

Lucene was written before 1.4.
If you implement Directory using NIO please contribute the code if you
can.

Otis

> I have not tried the RAM Directory yet.
> 
> Alex
> 
> ----- Original Message ----- 
> From: "Peter Carlson" <carlson@bookandhammer.com>
> To: "Lucene Developers List"
> <lucene-dev@jakarta.apache.org>; "Lucene Users List"
> <lucene-user@jakarta.apache.org>
> Sent: Tuesday, April 09, 2002 7:08 PM
> Subject: Re: Disk I/O in Lucene
> 
> 
> > Hi,
> > 
> > Lucene does not use the new nio API's in 1.4 (in
> fact it is compatible back
> > to 1.1.8).
> > 
> > What kind of bench marks are you looking for? I am
> currently searching over
> > 100K documents in about .015 seconds for a simple
> query on a Sun Netra T1
> > (450 Mhz).
> > 
> > If you have a real need for speed, Lucene also
> supports a RAM Directory to
> > store the index. I have not used this, but heard
> it's faster.
> > 
> > --Peter
> > 
> > 
> > On 4/9/02 2:41 PM, "Donglin Lu" <qlv@yahoo.com>
> wrote:
> > 
> > > 
> > > Hi, I am newbie to Lucene and have a question
> about
> > > Lucene's disk I/O.
> > > 
> > > For JDK 1.4 has java.nio APIs, does Lucene use
> this
> > > new I/O library to improve the disk I/O
> performance?
> > > Are they any benchmark about the performance of
> > > Lucene?
> > > 
> > > Thanks.
> > > 
> > > Alex
> > > 
> > > __________________________________________________
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