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Re: Predictive Caching - HBase - [mail # user]
...Hi, You don’t want to do it. (Think about what you’re asking for …) You would be better off w secondary indexing so that you can hit your index to get your subset of rows and then use the ma...
   Author: Michael Segel, 2015-04-23, 21:44
[expand - 8 more] - Re: Nondeterministic outcome based on cell TTL and major compaction event order - HBase - [mail # dev]
...Ok, So we agree that we’re talking about a hypothetical case because no one in their right mind would do something like this…. (Which means that someone will do this… ;-) If I had to describ...
   Author: Michael Segel, 2015-04-21, 13:07
[expand - 7 more] - Re: Rowkey design question - HBase - [mail # user]
...Sorry, but … We are in violent agreement. If done wrong it can and will kill you. Murphy’s law. If there’s more than one way to do something … the wrong way will be chosen, so where does tha...
   Author: Michael Segel, 2015-04-17, 18:03
[expand - 3 more] - Re: HBase region assignment by range? - HBase - [mail # user]
...Hi, Schemas are relatively straight forward if you ignore relational modeling. Think of a hierarchical  database where everything is stored and accessed off the primary key and then you...
   Author: Michael Segel, 2015-04-10, 17:08
Re: write availability - HBase - [mail # user]
...I don’t know if I would say that… I read Marcelo’s question of “if the cluster is up, even though a RS may be down, can I still insert records in to HBase?”So if the cluster is up, then you ...
   Author: Michael Segel, 2015-04-07, 14:25
[expand - 4 more] - Re: How to Manage Data Architecture & Modeling for HBase - HBase - [mail # user]
...Ok… The Hash table isn’t a really good analogy.Its really a scan of the META table that identifies which region. With respect to your use case… You can use HBase to solve it. You will need t...
   Author: Michael Segel, 2015-04-07, 12:26
Re: Removal of deprecated features - HBase - [mail # dev]
...You have to understand that anyone who has a slow moving (changing) application, will also have a UAT / DEV  area where they can test the impact of any system upgrade.  So if the u...
   Author: Michael Segel, 2015-04-06, 16:58
[expand - 3 more] - Re: introducing nodes w/ more storage - HBase - [mail # user]
...I don’t know that it is such a good idea. Let me ask it this way… What are you balancing with the HBase load balancer? Locations of HFiles on HDFS or which RS is responsible for the HFile? -...
   Author: Michael Segel, 2015-04-03, 18:30
[HBASE-12853] distributed write pattern to replace ad hoc 'salting' - HBase - [issue]
...In reviewing HBASE-11682 (Description of Hot Spotting), one of the issues is that while 'salting' alleviated  regional hot spotting, it increased the complexity required to utilize the ...
http://issues.apache.org/jira/browse/HBASE-12853    Author: Michael Segel, 2015-04-02, 14:59
[expand - 1 more] - Re: manual merge - HBase - [mail # user]
...Well with sequential data, you end up with your data being always added to the left of a region. So you’ll end up with your regions only 1/2 full after a split and then static. When you say ...
   Author: Michael Segel, 2015-03-23, 22:53
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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