How does a conventional file system compare? ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de
> -----Original Message----- > From: Mark Miller [mailto:markrmil...@gmail.com] > Sent: Tuesday, September 15, 2009 7:15 PM > To: java-user@lucene.apache.org > Subject: Re: lucene 2.9.0RC4 slower than 2.4.1? > > Mark Miller wrote: > > Indeed - I just ran the FileReaderTest on a Linux tmpfs ramdisk - with > > SeparateFile all 4 of my cores are immediately pinned and remain so. > > With ChannelFile, all 4 cores hover 20-30%. > > > > It would appear it may not be a good idea to use NIOFSDirectory on > ramdisks. > > > > Even still though - it looks like you have a further issue - your Lucene > > 2.9 old-api results don't use it, and are still not good. > > > > > The quick results: > > ramdisk: sudo mount -t tmpfs tmpfs /tmp/space -o > size=1G,nr_inodes=200k,mode=01777 > > config: impl=SeparateFile serial=false nThreads=4 iterations=100 > bufsize=1024 poolsize=2 filelen=730554368 > answer=-282295611, ms=173550, MB/sec=1683.7899579371938 > > config: impl=ChannelFile serial=false nThreads=4 iterations=100 > bufsize=1024 poolsize=2 filelen=730554368 > answer=-282295361, ms=1377768, MB/sec=212.09793463050383 > > > -- > - Mark > > http://www.lucidimagination.com > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
