If you want a specific directory implementation, instantiate it directly (new NIOFSDirectory)? If you use FSDirectory.open() it will use the autodetected one depending on OS and bitness.
About configuring your server from MMAP in a correct way, read http://blog.thetaphi.de/2012/07/use-lucenes-mmapdirectory-on-64bit.html; most important is the last section if you get OOM (which is not a OOM regarding heap space, it is something like "mmap failed" wrapped by an IOException). ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Neil Ireson [mailto:n.ire...@dcs.shef.ac.uk] > Sent: Wednesday, December 12, 2012 11:32 AM > To: java-user@lucene.apache.org > Subject: Explicit setting of NIOFSDirectory not respected > > Hi all, > > I run my code on a cluster where I have to preset resource limits and > therefore the processes have limited virtual memory causing OOME when > using MMapDirectory on large indexes. > > This means I explicitly use NIOFSDirectory (i.e. Directory indexDirectory = > NIOFSDirectory.open(indexFile);) however when I run the code on Java > HotSpot(TM) 64-Bit Server VM Lucene still uses MMapDirectory to open the > index, using a 32 bit JVM opens the index with NIOFSDirectory but I can only > assign -Xmx2G. > > Surely Lucene should not override my selection of NIOFSDirectory. > > N > > PS I'm using Lucene 4.1-SNAPSHOT > > > --------------------------------------------------------------------- > 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
