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[expand - 1 more] - Re: short scans in one RPC - HBase - [mail # dev]
...Cool. I didn't realize the scan interface had changed so much as part of switching to PB in 0.96.  For anyone else who is curious you can find the trail in the review comments on HBASE-...
   Author: Dave Latham, 2013-08-27, 17:23
[HBASE-1913] Regionserver accepts connections, doesn't handle them after bad filter request - HBase - [issue]
...I deployed some new regionservers but forgot to include a library that one of my filters used.  When a client used that filter, the HBaseServer listener thread attempted to deserialize ...
http://issues.apache.org/jira/browse/HBASE-1913    Author: Dave Latham, 2013-08-19, 23:46
[HBASE-8778] Region assigments scan table directory making them slow for huge tables - HBase - [issue]
...On a table with 130k regions it takes about 3 seconds for a region server to open a region once it has been assigned.Watching the threads for a region server running 0.94.5 that is opening m...
http://issues.apache.org/jira/browse/HBASE-8778    Author: Dave Latham, 2013-08-07, 02:40
[HBASE-9132] Use table dir modtime to avoid scanning table dir to check cached table descriptor in 0.94 - HBase - [issue]
...As described in HBASE-8778, anything that needs to read table descriptors (such as region assignments) currently results in a table directory scan which is slow on tables with many regions. ...
http://issues.apache.org/jira/browse/HBASE-9132    Author: Dave Latham, 2013-08-06, 17:20
[HBASE-9133] Use table dir modtime to avoid scanning table dir to check cached table descriptor - HBase - [issue]
...As described in HBASE-8778, anything that needs to read table descriptors (such as region assignments) currently results in a table directory scan which is slow on tables with many regions. ...
http://issues.apache.org/jira/browse/HBASE-9133    Author: Dave Latham, 2013-08-06, 04:48
[HBASE-9089] HRegion.heapSize is missing many fields - HBase - [issue]
...HRegion's heapSize method is missing many fields from its calculation.The static value DEEP_OVERHEAD is missing these:  // 1 x HashMap - coprocessorServiceHandlers  // 6 ...
http://issues.apache.org/jira/browse/HBASE-9089    Author: Dave Latham, 2013-07-30, 17:37
HRegion heapSize out of date - HBase - [mail # dev]
...While working on HBASE-8877 I noticed that HRegion.heapSize was missing many things.  I fixed FIXED_OVERHEAD as part of the issue, but didn't try to fix about a dozen missing fields fro...
   Author: Dave Latham, 2013-07-29, 22:33
removing lock ids from RegionObserver - HBase - [mail # dev]
...In HBASE-8877 I'm proposing to change row locks to be reentrant and thread based rather than tracking lock ids.  Part of that change would mean altering the RegionObserver coprocessor. ...
   Author: Dave Latham, 2013-07-06, 21:49
[expand - 1 more] - Re: data loss after cluster wide power loss - HBase - [mail # user]
...On Mon, Jul 1, 2013 at 4:52 PM, Azuryy Yu  wrote:  Set dfs.datanode.synconclose to true  See https://issues.apache.org/jira/browse/HDFS-1539...
   Author: Dave Latham, 2013-07-02, 00:34
region opening slow on large tables - HBase - [mail # dev]
...I'd really appreciate some input on HBASE-8778 from the developers.  Short summary: When opening regions, the region server (via FSTableDescriptors) scans the entire table directory to ...
   Author: Dave Latham, 2013-06-24, 17:32
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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