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[HDFS-5153] Datanode should send block reports for each storage in a separate message - HDFS - [issue]
...When the number of blocks on the DataNode grows large we start running into a few issues: Block reports take a long time to process on the NameNode. In testing we have seen that a block repo...
http://issues.apache.org/jira/browse/HDFS-5153    Author: Arpit Agarwal, 2014-07-25, 23:28
[HDFS-6729] Support maintenance mode for DN - HDFS - [issue]
...Some maintenance works (e.g., upgrading RAM or add disks) on DataNode only takes a short amount of time (e.g., 10 minutes). In these cases, the users do not want to report missing blocks on ...
http://issues.apache.org/jira/browse/HDFS-6729    Author: Lei, 2014-07-25, 22:56
[HDFS-223] Asynchronous IO Handling in Hadoop and HDFS - HDFS - [issue]
...I think Hadoop needs utilities or framework to make it simpler to deal with generic asynchronous IO in  Hadoop.Example use case :Its been a long standing problem that DataNode takes too...
http://issues.apache.org/jira/browse/HDFS-223    Author: Raghu Angadi, 2014-07-25, 21:12
[HDFS-964] hdfs-default.xml shouldn't use hadoop.tmp.dir for dfs.data.dir (0.20 and lower) / dfs.datanode.dir (0.21 and up) - HDFS - [issue]
...This question/problem pops up all the time.  Can we please eliminate hadoop.tmp.dir's usage from the default in dfs.data.dir.  It is confusing to new people and results in all sort...
http://issues.apache.org/jira/browse/HDFS-964    Author: Allen Wittenauer, 2014-07-25, 20:18
[HDFS-4449] When a decommission is awaiting closure of live blocks, show the block IDs on the NameNode's UI report - HDFS - [issue]
...It is rather common for people to be complaining about 'DN decommission' hangs cause of live blocks waiting to get completed by some app (especially certain HBase specifics cause a file to b...
http://issues.apache.org/jira/browse/HDFS-4449    Author: Harsh J, 2014-07-25, 20:07
[HDFS-6724] Decrypt EDEK before creating CryptoInputStream/CryptoOutputStream - HDFS - [issue]
...In DFSClient, we need to decrypt EDEK before creating CryptoInputStream/CryptoOutputStream, currently edek is used directly....
http://issues.apache.org/jira/browse/HDFS-6724    Author: Yi Liu, 2014-07-25, 19:33
[HDFS-6743] Put IP address into a new column on the new NN webUI - HDFS - [issue]
...The new NN webUI combines hostname and IP into one column in datanode list. It is more convenient for admins if the IP address can be put to a separate column, as in the legacy NN webUI....
http://issues.apache.org/jira/browse/HDFS-6743    Author: Ming Ma, 2014-07-25, 19:26
[HDFS-583] HDFS should enforce a max block size - HDFS - [issue]
...When DataNode creates a replica, it should enforce a max block size, so clients can't go crazy. One way of enforcing this is to make BlockWritesStreams to be filter steams that check the blo...
http://issues.apache.org/jira/browse/HDFS-583    Author: Hairong Kuang, 2014-07-25, 19:02
Re: Finding file size during block placement - HDFS - [mail # dev]
...On Wed, Jul 23, 2014 at 8:15 AM, Arjun  wrote:Hadoop uses a stream metaphor.  So at the time you're deciding what blocksto use for a DFSOutputStream, you don't know how many bytes ...
[+ more]    Author: Colin McCabe, 2014-07-25, 17:54
Re: [DISCUSS] Assume Private-Unstable for classes that are not annotated - HDFS - [mail # dev]
...+1.ColinOn Tue, Jul 22, 2014 at 2:54 PM, Karthik Kambatla wrote: ...
[+ more]    Author: Colin McCabe, 2014-07-25, 17:15
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