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[HDFS-7260] Make DFSOutputStream.MAX_PACKETS configurable - HDFS - [issue]
...DFSOutputStream.MAX_PACKETS is hard coded to 80.  In some case, a smaller value is preferred for reducing memory usage.   Let's make it configurable....
http://issues.apache.org/jira/browse/HDFS-7260    Author: Tsz Wo Nicholas Sze, 2014-10-22, 01:15
[HDFS-7265] Use a throttler for replica write in datanode - HDFS - [issue]
...BlockReceiver process packets in BlockReceiver.receivePacket() as follows read from socket enqueue the ack write to downstream write to diskThe above steps is repeated for each packet in a s...
http://issues.apache.org/jira/browse/HDFS-7265    Author: Tsz Wo Nicholas Sze, 2014-10-20, 22:53
[HDFS-7264] Tha last datanode in a pipeline should send a heartbeat when there is no traffic - HDFS - [issue]
...When the client is writing slowly, the client will send a heartbeat to signal that the connection is still alive.  This case works fine.However, when a client is writing fast but some o...
http://issues.apache.org/jira/browse/HDFS-7264    Author: Tsz Wo Nicholas Sze, 2014-10-20, 20:52
[HDFS-7144] Fix findbugs warnings in RamDiskReplicaTracker - HDFS - [issue]
...Two more findbugs warnings: Bad practice Warningsorg.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskReplicaTracker$RamDiskReplica.deleteSavedFiles() ignores exceptional return valu...
http://issues.apache.org/jira/browse/HDFS-7144    Author: Tsz Wo Nicholas Sze, 2014-10-18, 03:01
[HDFS-7143] Fix findbugs warnings in HDFS-6581 branch - HDFS - [issue]
...There are 4 findbugs warnings reported by Jenkins.https://builds.apache.org/job/PreCommit-HDFS-Build/8064/artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html...
http://issues.apache.org/jira/browse/HDFS-7143    Author: Tsz Wo Nicholas Sze, 2014-10-18, 03:00
[HDFS-5089] When a LayoutVersion support SNAPSHOT, it must support FSIMAGE_NAME_OPTIMIZATION. - HDFS - [issue]
...The SNAPSHOT layout requires FSIMAGE_NAME_OPTIMIZATION as a prerequisite.  However, RESERVED_REL1_3_0 supports SNAPSHOT but not FSIMAGE_NAME_OPTIMIZATION....
http://issues.apache.org/jira/browse/HDFS-5089    Author: Tsz Wo Nicholas Sze, 2014-10-16, 14:59
[HDFS-6997] Archival Storage: add more tests for data migration and replicaion - HDFS - [issue]
...This JIRA is to add more tests to check if the data migration tool could move the replicas correctly and if the replication monitor could replicate block correctly when storage policy is con...
http://issues.apache.org/jira/browse/HDFS-6997    Author: Tsz Wo Nicholas Sze, 2014-09-06, 23:42
[HDFS-5285] Flatten INodeFile hierarchy: Add UnderContruction Feature - HDFS - [issue]
...For files, there are INodeFile, INodeFileUnderConstruction, INodeFileWithSnapshot and INodeFileUnderConstructionWithSnapshot for representing whether a file is under construction or whether ...
http://issues.apache.org/jira/browse/HDFS-5285    Author: Tsz Wo Nicholas Sze, 2014-09-04, 02:15
[HDFS-5526] Datanode cannot roll back to previous layout version - HDFS - [issue]
...Current trunk layout version is -48.Hadoop v2.2.0 layout version is -47.If a cluster is upgraded from v2.2.0 (-47) to trunk (-48), the datanodes cannot start with -rollback.  It will fa...
http://issues.apache.org/jira/browse/HDFS-5526    Author: Tsz Wo Nicholas Sze, 2014-09-04, 00:41
[HDFS-4962] Use enum for nfs constants - HDFS - [issue]
...The constants defined in MountInterface and some other classes are better to use enum types instead of lists of int....
http://issues.apache.org/jira/browse/HDFS-4962    Author: Tsz Wo Nicholas Sze, 2014-09-04, 00:36
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB