Author: mduerig
Date: Wed Apr 27 13:10:19 2016
New Revision: 1741252
URL: http://svn.apache.org/viewvc?rev=1741252&view=rev
Log:
OAK-3348: Cross gc sessions might introduce references to pre-compacted segments
Updated Javadoc
Modified:
jackrabbit/oak/trunk/oak-segment-next/src/main/java/org/apache/jackrabbit/oak/segment/file/FileStore.java
Modified:
jackrabbit/oak/trunk/oak-segment-next/src/main/java/org/apache/jackrabbit/oak/segment/file/FileStore.java
URL:
http://svn.apache.org/viewvc/jackrabbit/oak/trunk/oak-segment-next/src/main/java/org/apache/jackrabbit/oak/segment/file/FileStore.java?rev=1741252&r1=1741251&r2=1741252&view=diff
==============================================================================
---
jackrabbit/oak/trunk/oak-segment-next/src/main/java/org/apache/jackrabbit/oak/segment/file/FileStore.java
(original)
+++
jackrabbit/oak/trunk/oak-segment-next/src/main/java/org/apache/jackrabbit/oak/segment/file/FileStore.java
Wed Apr 27 13:10:19 2016
@@ -860,12 +860,11 @@ public class FileStore implements Segmen
}
/**
- * Runs garbage collection on the segment level, which could write new
- * generations of tar files. It checks which segments are still reachable,
- * and throws away those that are not.
- * <p>
- * A new generation of a tar file is created (and segments are only
- * discarded) if doing so releases more than 25% of the space in a tar
file.
+ * Run garbage collection on the segment level: reclaim those data segments
+ * that are from an old segment generation and those bulk segments that
are not
+ * reachable anymore.
+ * Those tar files that shrink by at least 25% are rewritten to a new tar
generation
+ * skipping the reclaimed segments.
*/
public List<File> cleanup() throws IOException {
Stopwatch watch = Stopwatch.createStarted();
