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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, 2015-01-08, 23:35
[HDFS-7572] TestLazyPersistFiles#testDnRestartWithSavedReplicas is flaky on Windows - HDFS - [issue]
...Error MessageExpected: is <DISK>     but: was <RAM_DISK>Stacktracejava.lang.AssertionError: Expected: is <DISK>     but: was <RAM_DISK> ...
http://issues.apache.org/jira/browse/HDFS-7572    Author: Arpit Agarwal, 2015-01-06, 21:12
[HDFS-6919] Enforce a single limit for RAM disk usage and replicas cached via locking - HDFS - [issue]
...The DataNode can have a single limit for memory usage which applies to both replicas cached via CCM and replicas on RAM disk.See comments 1, 2 and 3 for discussion....
http://issues.apache.org/jira/browse/HDFS-6919    Author: Arpit Agarwal, 2014-12-16, 15:45
[HDFS-6101] TestReplaceDatanodeOnFailure fails occasionally - HDFS - [issue]
...Exception details in a comment below.The failure repros on both OS X and Linux if I run the test ~10 times in a loop....
http://issues.apache.org/jira/browse/HDFS-6101    Author: Arpit Agarwal, 2014-12-16, 11:13
[HDFS-7514] TestTextCommand fails on Windows - HDFS - [issue]
...TestTextCommand fails on WindowsError MessagePathname /D:/w/hbk/hadoop-hdfs-project/hadoop-hdfs/target/test/data/testText/weather.avro from D:/w/hbk/hadoop-hdfs-project/hadoop-hdfs/target/te...
http://issues.apache.org/jira/browse/HDFS-7514    Author: Arpit Agarwal, 2014-12-13, 15:25
[HDFS-5960] Fix TestRollingUpgrade - HDFS - [issue]
...TestRollingUpgrade fails when restarting the NN because OP_ROLLING_UPGRADE_START and OP_ROLLING_UPGRADE_FINALIZE are not expected.The fix is to start/finalize rolling upgrade when the corres...
http://issues.apache.org/jira/browse/HDFS-5960    Author: Arpit Agarwal, 2014-12-05, 02:13
[HDFS-4961] BlockId and Generation Stamp code should be moved to the blockmanagement package - HDFS - [issue]
...While reviewing the fix for HDFS-4645, Nicholas mentioned    The block id and generation stamp code actually should be moved to the blockmanagement package. See if you want to...
http://issues.apache.org/jira/browse/HDFS-4961    Author: Arpit Agarwal, 2014-11-13, 21:51
[HDFS-7093] Add config key to restrict setStoragePolicy - HDFS - [issue]
...Currently we do not allow unprivileged users to set the storage policy on a directory. This Jira proposes removing this restriction....
http://issues.apache.org/jira/browse/HDFS-7093    Author: Arpit Agarwal, 2014-11-01, 23:53
[HDFS-6934] Move checksum computation off the hot path when writing to RAM disk - HDFS - [issue]
...Since local RAM is considered reliable we can avoid writing checksums on the hot path when replicas are being written to a local RAM disk.The checksum can be computed by the lazy writer when...
http://issues.apache.org/jira/browse/HDFS-6934    Author: Arpit Agarwal, 2014-10-28, 14:21
[HDFS-6988] Add configurable limit for percentage-based eviction threshold - HDFS - [issue]
...Per feedback from Colin Patrick McCabe on HDFS-6930, we can make the eviction thresholds configurable. The hard-coded thresholds may not be appropriate for very large RAM disks....
http://issues.apache.org/jira/browse/HDFS-6988    Author: Arpit Agarwal, 2014-10-23, 03:00
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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