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LUCENE-3198: use MMapDir by default (in FSDir.open) on Linux, 64 bit JRE 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1135650 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael McCandless 2011-06-14 15:38:58 +00:00
parent 0ae7396314
commit 8170f59839
2 changed files with 6 additions and 1 deletions
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5
lucene/CHANGES.txt
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@ -482,6 +482,11 @@ Changes in runtime behavior
* LUCENE-3146: IndexReader.setNorm throws IllegalStateException if the field
does not store norms. (Shai Erera, Mike McCandless)
* LUCENE-3198: On Linux, if the JRE is 64 bit and supports unmapping,
FSDirectory.open now defaults to MMapDirectory instead of
NIOFSDirectory since MMapDirectory gives better performance. (Mike
McCandless)
* LUCENE-3200: MMapDirectory now uses chunk sizes that are powers of 2.
When setting the chunk size, it is rounded down to the next possible

2
lucene/src/java/org/apache/lucene/store/FSDirectory.java
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@ -173,7 +173,7 @@ public abstract class FSDirectory extends Directory {
/** Just like {@link #open(File)}, but allows you to
* also specify a custom {@link LockFactory}. */
public static FSDirectory open(File path, LockFactory lockFactory) throws IOException {
if ((Constants.WINDOWS || Constants.SUN_OS)
if ((Constants.WINDOWS || Constants.SUN_OS || Constants.LINUX)
&& Constants.JRE_IS_64BIT && MMapDirectory.UNMAP_SUPPORTED) {
return new MMapDirectory(path, lockFactory);
} else if (Constants.WINDOWS) {