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[HDFS-8086] Move LeaseRenewer to the hdfs.client.impl package - HDFS - [issue]
http://issues.apache.org/jira/browse/HDFS-8086    Author: Tsz Wo Nicholas Sze, 2015-05-02, 16:34
[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, 2015-05-02, 06:12
[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, 2015-05-02, 06:11
[HDFS-6633] Support reading new data in a being written file until the file is closed - HDFS - [issue]
...When a file is being written, the file length keeps increasing.  If the file is opened for read, the reader first gets the file length and then read only up to that length.  The re...
http://issues.apache.org/jira/browse/HDFS-6633    Author: Tsz Wo Nicholas Sze, 2015-05-02, 06:11
[HDFS-8283] DataStreamer cleanup and some minor improvement - HDFS - [issue]
...When throwing an exception always set lastException always creating a new exception so that it has the new stack trace Add LOG. Add final to isAppend and favoredNodes...
http://issues.apache.org/jira/browse/HDFS-8283    Author: Tsz Wo Nicholas Sze, 2015-05-01, 16:40
[HDFS-8289] DFSStripedOutputStream uses an additional rpc all to getErasureCodingInfo - HDFS - [issue]
...    // ECInfo is restored from NN just before writing striped files.    ecInfo = dfsClient.getErasureCodingInfo(src);The rpc call above can be avoided by adding...
http://issues.apache.org/jira/browse/HDFS-8289    Author: Tsz Wo Nicholas Sze, 2015-05-01, 00:57
[HDFS-8288] Refactor DFSStripedOutputStream and StripedDataStreamer - HDFS - [issue]
...DFSStripedOutputStream has a list of StripedDataStreamer(s).  The streamers share a data structure List<BlockingQueue<LocatedBlock>> stripeBlocks for communicate located blo...
http://issues.apache.org/jira/browse/HDFS-8288    Author: Tsz Wo Nicholas Sze, 2015-04-30, 21:09
[HDFS-7687] Change fsck to support EC files - HDFS - [issue]
...We need to change fsck so that it can detect "under replicated" and corrupted EC files....
http://issues.apache.org/jira/browse/HDFS-7687    Author: Tsz Wo Nicholas Sze, 2015-04-30, 12:01
[HDFS-8287] DFSStripedOutputStream.writeChunk should not wait for writing parity - HDFS - [issue]
...When a stripping cell is full, writeChunk computes and generates parity packets.  It sequentially calls waitAndQueuePacket so that user client cannot continue to write data until it fin...
http://issues.apache.org/jira/browse/HDFS-8287    Author: Tsz Wo Nicholas Sze, 2015-04-29, 19:57
[HDFS-7397] The conf key "dfs.client.read.shortcircuit.streams.cache.size" is misleading - HDFS - [issue]
...For dfs.client.read.shortcircuit.streams.cache.size, is it in MB or KB?  Interestingly, it is neither in MB nor KB.  It is the number of shortcircuit streams....
http://issues.apache.org/jira/browse/HDFS-7397    Author: Tsz Wo Nicholas Sze, 2015-04-28, 22:20
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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