Hi, In Lucene 7.7 you can use ByteBuffersDirectory, the default constructor behaves like RAMDirectory (allocates on heap), but has much better concurrency and garbage collection behaviour (no millions of byte[8192] instances holding the data) http://lucene.apache.org/core/7_7_0/core/org/apache/lucene/store/ByteBuffersDirectory.html
By using the complex constructor you can also make it behave funny things like allocation of DirectBuffers off-heap (using Java's ByteBuffer::allocateDirect method passed as reference to ByteBuffersDataOutput blockAllocate parameter) or similar stuff. But when doing this you are on your own. Nevertheless, MMapDirectory on a Linux "tmpfs" filesystem is the better choice for most use cases. Uwe ----- Uwe Schindler Achterdiek 19, D-28357 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Jonathan Willis <quicksilver...@gmail.com> > Sent: Wednesday, February 27, 2019 12:19 AM > To: java-user@lucene.apache.org > Subject: in memory lucene > > Hi, i'm looking into using Lucene 7.7.0 and noticed that the RAMDirectory > has been deprecated because of inefficient synchronization issues and that > we are encouraged to use MMapDirectory instead. I was hoping to use an in > memory only directory and was wondering if that would be possible without > RAMDirectory? How would I go about doing this? > > Thank you > -- > Jonathan Willis --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
