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[HDFS-4906] HDFS Output streams should not accept writes after being closed - HDFS - [issue]
...Currently if one closes an OutputStream obtained from FileSystem#create and then calls write(...) on that closed stream, the write will appear to succeed without error though no data will be...
http://issues.apache.org/jira/browse/HDFS-4906    Author: Aaron T. Myers, 2013-08-27, 23:08
[HDFS-4592] Default values for access time precision are out of sync between hdfs-default.xml and the code - HDFS - [issue]
...In hdfs-default.xml we have:<property>  <name>dfs.namenode.accesstime.precision</name>  <value>3600000</value>  <description>...
http://issues.apache.org/jira/browse/HDFS-4592    Author: Aaron T. Myers, 2013-08-27, 23:08
[HDFS-4747] Convert snapshot user guide to APT from XDOC - HDFS - [issue]
...To be consistent with the rest of the HDFS docs, the snapshots user guide should use APT instead of XDOC....
http://issues.apache.org/jira/browse/HDFS-4747    Author: Aaron T. Myers, 2013-08-06, 07:28
[HDFS-3404] Make putImage in GetImageServlet infer remote address to fetch from request - HDFS - [issue]
...As it stands, daemons which perform checkpointing must determine their own address on which they can be reached, so that the NN which they checkpoint against knows what address to fetch a me...
http://issues.apache.org/jira/browse/HDFS-3404    Author: Aaron T. Myers, 2013-08-06, 02:51
[HDFS-5060] NN should proactively perform a saveNamespace if it has a huge number of outstanding uncheckpointed transactions - HDFS - [issue]
...In a properly-functioning HDFS system, checkpoints will be triggered either by the secondary NN or standby NN regularly, by default every hour or 1MM outstanding edits transactions, whicheve...
http://issues.apache.org/jira/browse/HDFS-5060    Author: Aaron T. Myers, 2013-08-05, 18:35
Re: Question for edit log retain - HDFS - [mail # dev]
...Hi Azuryy,  On Wed, Jun 26, 2013 at 6:12 PM, Azuryy Yu  wrote:   Here, "checkpoint" is referring to the fsimage files on the NN.    This is the number of old fsimage...
   Author: Aaron T. Myers, 2013-07-01, 23:02
[HDFS-4830] Typo in config settings for AvailableSpaceVolumeChoosingPolicy in hdfs-default.xml - HDFS - [issue]
...In hdfs-default.xml we have these two settings:dfs.datanode.fsdataset.volume.choosing.balanced-space-thresholddfs.datanode.fsdataset.volume.choosing.balanced-space-preference-percentBut in f...
http://issues.apache.org/jira/browse/HDFS-4830    Author: Aaron T. Myers, 2013-05-25, 16:10
[HDFS-2393] Mark appropriate methods of ClientProtocol with the idempotent annotation - HDFS - [issue]
...HDFS-1973 will make the DFSClient take advantage of the annotation. This JIRA is to identify which methods can be marked as idempotent....
http://issues.apache.org/jira/browse/HDFS-2393    Author: Aaron T. Myers, 2013-05-25, 00:04
Re: [VOTE] Merge HDFS-2802 snapshot feature to trunk - HDFS - [mail # dev]
...I'm +1 as well on merging this branch to trunk. I've thoroughly reviewed/discussed the design and have personally reviewed much of the code as well. Good stuff.  I would have preferred ...
   Author: Aaron T. Myers, 2013-05-08, 00:29
[HDFS-4739] NN can miscalculate the number of extra edit log segments to retain - HDFS - [issue]
...The code in NNStorageRetentionManager#purgeOldStorage is intended to place a cap on the number of extra edit log segments retained beyond what is strictly required to replay the FS history s...
http://issues.apache.org/jira/browse/HDFS-4739    Author: Aaron T. Myers, 2013-04-25, 15:07
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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