Somewhat obvious caution: don't assume the NIO (well I guess you
mean memory mapped i/o) code will be faster - some isolation testing
I did in release candidates of jdk1.4 showed it to be *slower* than
normal file i/o. No doubt it should be faster.
Note: can't find bug report I submitted to javasoft but there are other
reports
that seem to indicate that this is fixed.
-----Original Message-----
From: Donglin Lu [mailto:qlv@yahoo.com]
Sent: Wednesday, April 10, 2002 12:23 AM
To: lucene-dev@jakarta.apache.org
Subject: Re: Disk I/O in Lucene
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.
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
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Yahoo! Tax Center - online filing with TurboTax
> > http://taxes.yahoo.com/
> >
> > --
> > To unsubscribe, e-mail:
<mailto:lucene-dev-unsubscribe@jakarta.apache.org>
> > For additional commands, e-mail:
<mailto:lucene-dev-help@jakarta.apache.org>
> >
> >
>
>
> --
> To unsubscribe, e-mail:
<mailto:lucene-user-unsubscribe@jakarta.apache.org>
> For additional commands, e-mail:
<mailto:lucene-user-help@jakarta.apache.org>
__________________________________________________
Do You Yahoo!?
Yahoo! Tax Center - online filing with TurboTax
http://taxes.yahoo.com/ --
To unsubscribe, e-mail:
<mailto:lucene-dev-unsubscribe@jakarta.apache.org>
For additional commands, e-mail:
<mailto:lucene-dev-help@jakarta.apache.org>
--
To unsubscribe, e-mail: <mailto:lucene-dev-unsubscribe@jakarta.apache.org>
For additional commands, e-mail: <mailto:lucene-dev-help@jakarta.apache.org>