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[HDFS-3528] Use native CRC32 in DFS write path - HDFS - [issue]
...HDFS-2080 improved the CPU efficiency of the read path by using native SSE-enabled code for CRC verification. Benchmarks of the write path show that it's often CPU bound by checksums as well...
http://issues.apache.org/jira/browse/HDFS-3528    Author: Todd Lipcon, 2014-09-05, 10:45
[HDFS-7002] Failed to rolling upgrade hdfs from 2.2.0 to 2.4.1 - HDFS - [issue]
http://issues.apache.org/jira/browse/HDFS-7002    Author: sam liu, 2014-09-05, 10:26
[HDFS-6147] New blocks scanning will be delayed due to issue in BlockPoolSliceScanner#updateBytesToScan(..) - HDFS - [issue]
...New blocks scanning will be delayed if old blocks deleted after datanode restart.Steps:1. Write some blocks and wait till all scans over2. Restart the datanode3. Delete some of the blocks4. ...
http://issues.apache.org/jira/browse/HDFS-6147    Author: Vinayakumar B, 2014-09-05, 08:25
[HDFS-6995] Block should be placed in the client's 'rack-local' node if 'client-local' node is not available - HDFS - [issue]
...HDFS cluster is rack aware.Client is in different node than of datanode,but Same rack contains one or more datanodes.In this case first preference should be given to select 'rack-local' node...
http://issues.apache.org/jira/browse/HDFS-6995    Author: Vinayakumar B, 2014-09-05, 08:25
[HDFS-6876] Archival Storage: support set/get storage policy in DFSAdmin - HDFS - [issue]
...We need to have DFSAdmin commands to manually set/get the storage policy of a file/directory....
http://issues.apache.org/jira/browse/HDFS-6876    Author: Jing Zhao, 2014-09-05, 04:16
[HDFS-6945] BlockManager should remove a block from excessReplicateMap and decrement ExcessBlocks metric when the block is removed - HDFS - [issue]
...I'm seeing ExcessBlocks metric increases to more than 300K in some clusters, however, there are no over-replicated blocks (confirmed by fsck).After a further research, I noticed when deletin...
http://issues.apache.org/jira/browse/HDFS-6945    Author: Akira AJISAKA, 2014-09-05, 03:54
[HDFS-6871] Improve NameNode performance when creating file   - HDFS - [issue]
...Creating file with overwrite flag will cause NN fall into flush edit logs and block other requests if the file exists.When we create a file with overwrite flag (default is true) in HDFS, NN ...
http://issues.apache.org/jira/browse/HDFS-6871    Author: Yi Liu, 2014-09-05, 03:41
[HDFS-6998] warning message 'ssl.client.truststore.location has not been set' gets printed for hftp command - HDFS - [issue]
...hftp command prints 'WARN ssl.FileBasedKeyStoresFactory: The property 'ssl.client.truststore.location' has not been set, no TrustStore will be loaded' in Windows unsecure environment. This i...
http://issues.apache.org/jira/browse/HDFS-6998    Author: Yesha Vora, 2014-09-05, 00:49
[HDFS-6848] Lack of synchronization on access to datanodeUuid in DataStorage#format() - HDFS - [issue]
...    this.datanodeUuid = datanodeUuid;The above assignment should be done holding lock "DataStorage.this" - as is done in two other places....
http://issues.apache.org/jira/browse/HDFS-6848    Author: Ted Yu, 2014-09-05, 00:22
[HDFS-6757] Simplify lease manager with INodeID - HDFS - [issue]
...Currently the lease manager records leases based on path instead of inode ids. Therefore, the lease manager needs to carefully keep track of the path of active leases during renames and dele...
http://issues.apache.org/jira/browse/HDFS-6757    Author: Haohui Mai, 2014-09-05, 00:19
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