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[HDFS-7979] Initialize block report IDs with a random number - HDFS - [issue]
...Right now block report IDs use system nanotime. This isn't that random, so let's start it at a random number for some more safety....
http://issues.apache.org/jira/browse/HDFS-7979    Author: Andrew Wang, 2015-04-09, 12:56
[HDFS-8004] Use KeyProviderCryptoExtension#warmUpEncryptedKeys when creating an encryption zone - HDFS - [issue]
...It'd be slightly better to use the provided warm-up method, even though what we do now (getting and throwing away a key) is functionally the same....
http://issues.apache.org/jira/browse/HDFS-8004    Author: Andrew Wang, 2015-04-01, 03:38
[HDFS-8007] Lower RollingWindowManager log to debug - HDFS - [issue]
...Noticed this while looking in a NN log, it's kind of spammy:2015-03-25 00:04:12,052 INFO org.apache.hadoop.hdfs.server.namenode.top.window.RollingWindowManager: topN size for command setTime...
http://issues.apache.org/jira/browse/HDFS-8007    Author: Andrew Wang, 2015-03-30, 05:35
[HDFS-7411] Refactor and improve decommissioning logic into DecommissionManager - HDFS - [issue]
...Would be nice to split out decommission logic from DatanodeManager to DecommissionManager....
http://issues.apache.org/jira/browse/HDFS-7411    Author: Andrew Wang, 2015-03-27, 22:34
[HDFS-7405] TestDatanodeBlockScanner#testDuplicateScans hangs - HDFS - [issue]
...Seen on some precommit runs, also observed locally....
http://issues.apache.org/jira/browse/HDFS-7405    Author: Andrew Wang, 2015-03-17, 18:51
Re: Hadoop 3.x: what about shipping trunk as a 2.x release in 2015? - HDFS - [mail # dev]
...I find this proposal very surprising. We've intentionally deferredincompatible changes to trunk, because they are incompatible and do notbelong in a minor release. Now we are supposed to blu...
   Author: Andrew Wang, 2015-03-09, 22:57
[expand - 2 more] - Re: Looking to a Hadoop 3 release - HDFS - [mail # dev]
...Since these dependency bumps are very disruptive to downstreams, I want topredicate upgrading our deps on having classpath isolation on. I thinkthat's what Tucu was getting at.Best,AndrewOn ...
   Author: Andrew Wang, 2015-03-06, 18:55
[expand - 2 more] - Re: Dose hdfs support the configuration that different blocks can have different number of replcias? - HDFS - [mail # dev]
...Lipeng,-setrep allows you to change the replication of an existing file. You canalso specify the replication factor when you initially create a file. Notsure what you mean by "dynamically", ...
   Author: Andrew Wang, 2015-03-04, 21:51
Re: DISCUSSION: Patch commit criteria. - HDFS - [mail # dev]
...I have the same interpretation as Konst on this. +1 from at least onecommitter other than the author, no -1s.I don't think there should be an exclusion for trivial patches, since thedefiniti...
   Author: Andrew Wang, 2015-02-27, 22:28
Re: How to build and run my own test code of HDFS - HDFS - [mail # dev]
...Hi Lipeng,Note that Surefire only picks up tests that match the following:By default, the Surefire Plugin will automatically include all test classeswith the following wildcard patterns:&nbs...
   Author: Andrew Wang, 2015-02-26, 00:26
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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