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[expand - 1 more] - Re: HBase backup, recovery, replication et al - HBase - [mail # user]
...Primarily the link above, but also got comfortable with the source code after some bumps.  You may want to consider moving to a more recent version depending how much volume you're expe...
   Author: Dave Latham, 2013-10-17, 22:06
[HBASE-8877] Reentrant row locks - HBase - [issue]
...HBASE-8806 revealed performance problems with batch mutations failing to reacquire the same row locks.  It looks like HBASE-8806 will use a less intrusive change for 0.94 to have batch ...
http://issues.apache.org/jira/browse/HBASE-8877    Author: Dave Latham, 2013-10-15, 05:46
Re: Limit number of columns in column family - HBase - [mail # user]
...What about having all columns in the column family use the same qualifier and then setting the max versions for that column family to limit it? http://hbase.apache.org/book.html#schema.versi...
   Author: Dave Latham, 2013-09-23, 21:32
Re: Tables gets Major Compacted even if they haven't changed - HBase - [mail # user]
...Major compactions can still be useful to improve locality - could we add a condition to check for that too?   On Mon, Sep 9, 2013 at 10:41 PM, lars hofhansl  wrote:  ...
   Author: Dave Latham, 2013-09-10, 18:11
[HBASE-9208] ReplicationLogCleaner slow at large scale - HBase - [issue]
...At a large scale the ReplicationLogCleaner fails to clean up .oldlogs as fast as the cluster is producing them.  For each old HLog file that has been replicated and should be deleted th...
http://issues.apache.org/jira/browse/HBASE-9208    Author: Dave Latham, 2013-08-29, 17:48
[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
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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