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RE: Region Servers Crashing during Random Reads - HBase - [mail # user]
...How much heap are you running on your RegionServers?  6GB of total RAM is on the low end.  For high throughput applications, I wo uld recommend at least 6-8GB of heap (so 8+ GB of ...
   Author: Jonathan Gray, 2011-02-03, 20:13
RE: doing a scan that will return random columns in a table's family - HBase - [mail # user]
...Result is just the client-side class which wraps whatever the server return s.  The ability to do this query is not really about whether Result has the  methods to get at this data...
   Author: Jonathan Gray, 2011-02-03, 18:18
RE: HBase roadmaps - HBase - [mail # dev]
...+1 on dropping 0.20.7  ....
   Author: Jonathan Gray, 2011-01-21, 06:42
RE: performance regression after hbase restart - HBase - [mail # user]
...In HBase 0.90.0 there is a new "retain assignment" configuration parameter  that makes it so your cluster keeps the same region assignment between full  cluster restarts.  It ...
   Author: Jonathan Gray, 2011-01-21, 03:37
[expand - 1 more] - RE: hbase 0.20.6 - HBaseClusterTestCase, DU, cygwin, IntelliJ - arg! - HBase - [mail # user]
...Sounds like a bug.  Want to file a JIRA with as much detail as you can incl uding log snippets?  arg! - s by t it per ocess to port ? arg! t is ot found,  for ....
   Author: Jonathan Gray, 2011-01-21, 00:56
[expand - 1 more] - RE: stargate 20.6 with hbase 20.2 - HBase - [mail # user]
...The basic steps are the same, but to go from 0.20 to 0.90 there is no actua l "migrate" step.  On the HBase side, all that is required is shutting down  the old version and coming ...
   Author: Jonathan Gray, 2011-01-20, 19:19
RE: Online modify table schema (e.g. AddColumnFamily, DeleteColumnFamily, etc) and other features - HBase - [mail # dev]
...le able  This is in the plans and exactly as you describe.  We are planning to move  table schema information into ZooKeeper and then support online schema modi fications. &nb...
   Author: Jonathan Gray, 2011-01-20, 18:10
[expand - 1 more] - RE: Scan (Start Row, End Row) vs Scan (Row) - HBase - [mail # user]
...Yes.  t xFilter ter will  fail and arts m...
   Author: Jonathan Gray, 2011-01-20, 16:43
RE: Question about HBase Delete - HBase - [mail # dev]
...HBase (and BigTable) use delete markers (or tombstones).  As you say, once  written, all data is immutable.  These markers look very similar to normal Put operations but the H...
   Author: Jonathan Gray, 2011-01-20, 16:36
RE: Scan with Filter - HBase - [mail # user]
...The API shows one row per next() call but the number of rows fetched per RP C can be configured much higher with Scan.setCaching().  Filters are basically just server-side predicates th...
   Author: Jonathan Gray, 2011-01-18, 18:49
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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