org.apache.cassandra.tools

Class SSTableExpiredBlockers

java.lang.Object

org.apache.cassandra.tools.SSTableExpiredBlockers

public class SSTableExpiredBlockers
extends java.lang.Object

During compaction we can drop entire sstables if they only contain expired tombstones and if it is guaranteed to not cover anything in other sstables. An expired sstable can be blocked from getting dropped if its newest timestamp is newer than the oldest data in another sstable. This class outputs all sstables that are blocking other sstables from getting dropped so that a user can figure out why certain sstables are still on disk.

Constructor Summary

Constructors

Constructor and Description
SSTableExpiredBlockers()

Method Summary

Modifier and Type	Method and Description
static com.google.common.collect.Multimap<SSTableReader,SSTableReader>	checkForExpiredSSTableBlockers(java.lang.Iterable<SSTableReader> sstables, int gcBefore)
static void	main(java.lang.String[] args)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SSTableExpiredBlockers

public SSTableExpiredBlockers()

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Throws:

java.io.IOException

checkForExpiredSSTableBlockers

public static com.google.common.collect.Multimap<SSTableReader,SSTableReader> checkForExpiredSSTableBlockers(java.lang.Iterable<SSTableReader> sstables,
                                                                                                             int gcBefore)