Colin Patrick McCabe
Vinod Kumar Vavilapalli
Tsz Wo Nicholas Sze
Aaron T. Myers
Brahma Reddy Battula
Uma Maheswara Rao G
Arun C Murthy
Colin P. McCabe
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[HDFS-173] Recursively deleting a directory with millions of files makes NameNode unresponsive for other commands until the deletion completes
...Delete a directory with millions of files. This could take several minutes (observed 12 mins for 9 million files). While the operation is in progress FSNamesystem lock is held and the reques...
, 2012-08-14, 15:38
[HDFS-3002] TestNameNodeMetrics need not wait for metrics update with new metrics framework
...With older metrics framework, the namenode metrics was updated by replication thread. This required test having to wait for replication interval. This is no longer necessary with metrics2 fr...
, 2012-06-27, 19:35
[HDFS-2954] Remove implementing Writable interface in the datatypes used at the client and the server
...With the completion of translator layer in HDFS, the separation of server/client datatypes and the wire types is complete. The server/client datatypes no longer need to implement Writables....
, 2012-06-15, 21:09
[HDFS-2938] Recursive delete of a large directory makes namenode unresponsive
...When deleting a large directory with millions of files, namenode holding FSNamesystem lock will make it unresponsive for other request. In this scenario HDFS-173 added a mechanism to delete ...
, 2012-06-06, 00:29
[HDFS-3211] JournalProtocol changes required for introducing epoch and fencing
...JournalProtocol changes to introduce epoch in every request. Adding new method fence for fencing a JournalService. On BackupNode fence is a no-op....
, 2012-05-12, 14:03
[HDFS-3393] Rollback on newer release must not be allowed if the layout version in the snapshot is for older release.
...After upgrading to a new release, the procedure to rollback to older release is to start the namenode in older release with -rollback option.As reported in HADOOP-8371, the rollback was allo...
, 2012-05-10, 05:01
[HDFS-2895] Remove Writable wire protocol related code that is no longer necessary
...With recent changes to move wire protocol to protocol buffers, the existing writable, related translators are no longer necessary....
, 2012-04-10, 00:57
[HDFS-3212] Persist the epoch received by the JournalService
...epoch received over JournalProtocol should be persisted by JournalService....
, 2012-04-06, 18:46
[HDFS-3204] Minor modification to JournalProtocol.proto to make it generic
...JournalProtocol.proto uses NamenodeRegistration in methods such as journal() for identifying the source. I want to make it generic so that the method can be called with journal information t...
, 2012-04-06, 16:48
[HDFS-3183] Add JournalManager implementation to JournalDaemons for storing edits
...The JournalManager is used in HA configuration and uses the following journal daemons on: Local namenode Other namenode A configured JournalDaemon target from the configuration...
, 2012-04-04, 06:23
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