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Re: Meta region hotspotting - HBase - [mail # user]
...Some time ago, we had a situation where our REST server was slammed with queries that did not find any matches for rows in Hbase.  When that happened we sustained 50k rpc/sec to META re...
   Author: Jack Levin, 2011-12-27, 01:32
[expand - 3 more] - Re: holes in tables. - HBase - [mail # user]
...patch_meta.rb has some problems.  I ran it, and it would create region start/end combos, there were incorrect in terms of order, for example "dab - cab", which is a region that is not r...
   Author: Jack Levin, 2011-12-26, 18:15
hbase sandbox at ImageShack. - HBase - [mail # user]
...Hello All.   I've setup an hbase (0.90.4) sandbox running on servers where we have some excess capacity.  Feel free to play with it, e.g. create tables, run load tests, benchmarks,...
   Author: Jack Levin, 2011-12-01, 22:34
[expand - 3 more] - Re: errors after upgrade - HBase - [mail # user]
...Nope, there are no timeouts, the queries are fast and 95% in cache, this looks like a region server tried to read some memory buffer and get 0 bytes in return.  -Jack  On Mon, Nov ...
   Author: Jack Levin, 2011-11-15, 03:50
Re: Getting EOF Exception when starting HBASE - HBase - [mail # user]
...You likely have hadoop-core in hbase/lib dir that's wrong, delete it, and co py one from Hadoop/ dir  -Jack   On Nov 2, 2011, at 10:14 AM, LoveIR  wrote:  when-starting-H...
   Author: Jack Levin, 2011-11-02, 18:12
Re: [jira] [Updated] (HBASE-4695) WAL logs get deleted before region server can fully flush - HBase - [mail # user]
...It would be nice to have a patch for 0.90.4 also.   Thanks,  -Jack  On Mon, Oct 31, 2011 at 9:49 AM, stack (Updated) (JIRA)  w rote: assian.jira.plugin.system.issuetabpan...
   Author: Jack Levin, 2011-11-01, 00:08
Re: Region server crash? - HBase - [mail # user]
...The master will detect that RS is down by periodically checking a zookeeper ( it will say in the master log, znode expired ).  After, it will check to see if there is anything in /hbase...
   Author: Jack Levin, 2011-09-21, 07:25
Re: prevent region splits? - HBase - [mail # user]
...Make hbase.hregion.max.filesize to be very large. Then your regions won't split.  We use this method when copying 'live' hbase to make a backup.  -Jack  On Sat, Sep 3, 2011 at...
   Author: Jack Levin, 2011-09-03, 23:54
Re: HBase connection pool - HBase - [mail # user]
...here is connection pool implementation that works for us:  http://pastebin.com/KBv9t7S8  -Jack  On Sun, Jul 17, 2011 at 11:16 PM, aadish  wrote:...
   Author: Jack Levin, 2011-07-18, 16:40
Re: User of FilterList - HBase - [mail # user]
...Be mindful that if you are using a scanner with filters, RowKey remains the index of the table, and that filter just filters your results based on how you run your scanner, similarly to "cat...
   Author: Jack Levin, 2011-07-16, 20:27
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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