org.apache.hadoop.hdfs.server.namenode

Class NNStorageRetentionManager

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager

public class NNStorageRetentionManager
extends Object

The NNStorageRetentionManager is responsible for inspecting the storage directories of the NN and enforcing a retention policy on checkpoints and edit logs. It delegates the actual removal of files to a StoragePurger implementation, which might delete the files or instead copy them to a filer or HDFS for later analysis.

Constructor Summary

Constructors

Constructor and Description
NNStorageRetentionManager(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.hdfs.server.namenode.NNStorage storage, org.apache.hadoop.hdfs.server.namenode.FSEditLog editLog)
NNStorageRetentionManager(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.hdfs.server.namenode.NNStorage storage, org.apache.hadoop.hdfs.server.namenode.FSEditLog editLog, org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager.StoragePurger purger)

Method Summary

Methods

Modifier and Type	Method and Description
void	purgeOldStorage()

Methods inherited from class java.lang.Object

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

Constructor Detail

NNStorageRetentionManager

public NNStorageRetentionManager(org.apache.hadoop.conf.Configuration conf,
                         org.apache.hadoop.hdfs.server.namenode.NNStorage storage,
                         org.apache.hadoop.hdfs.server.namenode.FSEditLog editLog,
                         org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager.StoragePurger purger)

NNStorageRetentionManager

public NNStorageRetentionManager(org.apache.hadoop.conf.Configuration conf,
                         org.apache.hadoop.hdfs.server.namenode.NNStorage storage,
                         org.apache.hadoop.hdfs.server.namenode.FSEditLog editLog)

Method Detail

purgeOldStorage

public void purgeOldStorage()
                     throws IOException

Throws:

IOException