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

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

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