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[HBASE-11767] [0.94] Unnecessary garbage produced by schema metrics during scanning - HBase - [issue]
...Near the end of StoreScanner.next(...) we find this gem:    } finally {      if (cumulativeMetric > 0 && metric != null) {     &n...
http://issues.apache.org/jira/browse/HBASE-11767    Author: Lars Hofhansl, 2014-08-17, 07:27
[HBASE-9778] Add hint to ExplicitColumnTracker to avoid seeking - HBase - [issue]
...The issue of slow seeking in ExplicitColumnTracker was brought up by Vladimir Rodionov on the dev list.My idea here is to avoid the seeking if we know that there aren't many versions to skip...
http://issues.apache.org/jira/browse/HBASE-9778    Author: Lars Hofhansl, 2014-08-14, 21:20
[HBASE-10642] Add M/R over snapshots to 0.94 - HBase - [issue]
...I think we want drive towards all (or most) M/R over HBase to be against snapshots and HDFS directly.Adopting a simple input format (even if just as a sample) as part of HBase will allow us ...
http://issues.apache.org/jira/browse/HBASE-10642    Author: Lars Hofhansl, 2014-08-14, 21:20
[HBASE-10594] Speed up TestRestoreSnapshotFromClient - HBase - [issue]
...Looking through the longest running test in 0.94 I noticed that TestRestoreSnapshotFromClient runs for over 10 minutes on the jenkins boxes (264s on my local box)....
http://issues.apache.org/jira/browse/HBASE-10594    Author: Lars Hofhansl, 2014-08-14, 21:20
[HBASE-10722] [0.94] HRegion.computeHDFSBlocksDistribution does not account for links and reference files. - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-10722    Author: Lars Hofhansl, 2014-08-14, 21:20
[HBASE-10247] Client promises about timestamps - HBase - [issue]
...This is to start a discussion about timestamp promises declared per table of CF.For example if a client promises only monotonically increasing timestamps (or no custom set timestamps) and VE...
http://issues.apache.org/jira/browse/HBASE-10247    Author: Lars Hofhansl, 2014-08-13, 05:59
[HBASE-11633] [0.94] port HBASE-11217 Race between SplitLogManager task creation + TimeoutMonitor - HBase - [issue]
...See HBASE-11217. This can lead to massive data loss as explained there....
http://issues.apache.org/jira/browse/HBASE-11633    Author: Lars Hofhansl, 2014-08-09, 05:40
[HBASE-11695] PeriodicFlusher and WakeFrequency issues - HBase - [issue]
...We just ran into a flush storm caused by the PeriodicFlusher.Many memstore became eligible for flushing at exactly the same time, the effect we've seen is that the exact same region was flus...
http://issues.apache.org/jira/browse/HBASE-11695    Author: Lars Hofhansl, 2014-08-08, 07:28
[HBASE-9005] Improve documentation around KEEP_DELETED_CELLS, time range scans, and delete markers - HBase - [issue]
...Without KEEP_DELETED_CELLS all timerange queries are broken if their range covers a delete marker.As some internal discussions with colleagues showed, this feature is not well understand and...
http://issues.apache.org/jira/browse/HBASE-9005    Author: Lars Hofhansl, 2014-08-07, 22:20
[HBASE-11667] Comment ClientScanner logic for NSREs. - HBase - [issue]
...We ran into an issue with Phoenix where a RegionObserver coprocessor intercepts a scan and returns an aggregate (in this case a count) with a fake row key. It turns out this does not work wh...
http://issues.apache.org/jira/browse/HBASE-11667    Author: Lars Hofhansl, 2014-08-07, 01:24
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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