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[HBASE-12411] Optionally enable p-reads and private readers for compactions - HBase - [issue]
...In the light of HDFS-6735 we might want to consider refraining from seek + read completely and only perform preads.For example currently a compaction can lock out every other scanner over th...
http://issues.apache.org/jira/browse/HBASE-12411    Author: Lars Hofhansl, 2014-12-17, 22:09
[HBASE-5954] Allow proper fsync support for HBase - HBase - [issue]
...At least get recommendation into 0.96 doc and some numbers running w/ this hdfs feature enabled....
http://issues.apache.org/jira/browse/HBASE-5954    Author: Lars Hofhansl, 2014-12-17, 05:59
[HBASE-12173] Backport: [PE] Allow random value size - HBase - [issue]
...Looked at it briefly. Didn't have time to fix up the patch.Actually, removing this from 0.94....
http://issues.apache.org/jira/browse/HBASE-12173    Author: Lars Hofhansl, 2014-12-10, 05:11
[HBASE-12457] Regions in transition for a long time when CLOSE interleaves with a slow compaction - HBase - [issue]
...Under heave load we have observed regions remaining in transition for 20 minutes when the master requests a close while a slow compaction is running.The pattern is always something like this...
http://issues.apache.org/jira/browse/HBASE-12457    Author: Lars Hofhansl, 2014-12-09, 22:58
[HBASE-12545] Fix backwards compatibility issue introduced with HBASE-12363 - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-12545    Author: Lars Hofhansl, 2014-12-04, 18:16
[HBASE-12621] Explain in the book when KEEP_DELETED_CELLS is useful - HBase - [issue]
...KEEP_DELETED_CELLS seems to be very confusing.The books need further clarification when this setting is useful and what the implications are.(and maybe we should discuss if there's a simpler...
http://issues.apache.org/jira/browse/HBASE-12621    Author: Lars Hofhansl, 2014-12-03, 06:46
[HBASE-12146] RegionServerTracker should escape data in log messages - HBase - [issue]
...Trivial thing I observed when testing 0.94.24RC2.I see a log message of the form:2014-10-01 13:52:35,632 INFO org.apache.hadoop.hbase.zookeeper.RegionServerTracker: Rs node: /hbase/rs/newbun...
http://issues.apache.org/jira/browse/HBASE-12146    Author: Lars Hofhansl, 2014-11-29, 22:31
[HBASE-9117] Remove HTablePool and all HConnection pooling related APIs - HBase - [issue]
...The recommended way is now: Create an HConnection: HConnectionManager.createConnection(...) Create a light HTable: HConnection.getTable(...) table.close() connection.close()All other API and...
http://issues.apache.org/jira/browse/HBASE-9117    Author: Lars Hofhansl, 2014-11-26, 18:48
[HBASE-9731] updatesBlockedSeconds RegionServer metric should not be a histogram - HBase - [issue]
...I just noticed that updatesBlockedSeconds is declared as a histogram (in 0.94), which makes little sense (neither mean, nor any percentiles are useful, as it is an every increasing number).T...
http://issues.apache.org/jira/browse/HBASE-9731    Author: Lars Hofhansl, 2014-11-23, 01:37
[HBASE-6974] Metric for blocked updates - HBase - [issue]
...When the disc subsystem cannot keep up with a sustained high write load, a region will eventually block updates to throttle clients.(HRegion.checkResources).It would be nice to have a metric...
http://issues.apache.org/jira/browse/HBASE-6974    Author: Lars Hofhansl, 2014-11-23, 01:37
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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