org.apache.zookeeper.server

Class PurgeTxnLog

java.lang.Object

org.apache.zookeeper.server.PurgeTxnLog

@InterfaceAudience.Public
public class PurgeTxnLog
extends java.lang.Object

this class is used to clean up the snapshot and data log dir's. This is usually run as a cronjob on the zookeeper server machine. Invocation of this class will clean up the datalogdir files and snapdir files keeping the last "-n" snapshot files and the corresponding logs.

Constructor Summary

Constructors

Constructor and Description
PurgeTxnLog()

Method Summary

Modifier and Type	Method and Description
static void	main(java.lang.String[] args)
static void	purge(java.io.File dataDir, java.io.File snapDir, int num) Purges the snapshot and logs keeping the last num snapshots and the corresponding logs.

Methods inherited from class java.lang.Object

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

Constructor Detail

PurgeTxnLog

public PurgeTxnLog()

Method Detail

purge

public static void purge(java.io.File dataDir,
                         java.io.File snapDir,
                         int num)
                  throws java.io.IOException

Purges the snapshot and logs keeping the last num snapshots and the corresponding logs. If logs are rolling or a new snapshot is created during this process, these newest N snapshots or any data logs will be excluded from current purging cycle.

Parameters:

dataDir - the dir that has the logs

snapDir - the dir that has the snapshots

num - the number of snapshots to keep

Throws:

java.io.IOException

main

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

Parameters:

args - dataLogDir [snapDir] -n count dataLogDir -- path to the txn log directory snapDir -- path to the snapshot directory count -- the number of old snaps/logs you want to keep, value should be greater than or equal to 3

Throws:

java.io.IOException