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Re: How would you model this in Hbase? - HBase - [mail # user]
...Another approach would be to use Phoenix  (http://github.com/forcedotcom/phoenix). You can model your schema as  you would in the relational world, but you get the horizontal  ...
   Author: James Taylor, 2013-02-06, 22:01
Re: Query on JSON Object - HBase - [mail # user]
...You can use a utility like this one to convert from JSON to CSV (https://github.com/zeMirco/json2csv) and then Phoenix (https://github.com/forcedotcom/phoenix) to create a table and upload t...
   Author: James Taylor, 2013-02-06, 16:30
Re: Parallel scan in HBase - HBase - [mail # user]
...If you run a SQL query that does aggregation (i.e. uses a built-in  aggregation function like COUNT or does a GROUP BY), Phoenix will  orchestrate the running of a set of queries i...
   Author: James Taylor, 2013-02-01, 17:07
Re: Announcing Phoenix: A SQL layer over HBase - HBase - [mail # user]
...Thanks, everyone, and sorry to keep you waiting :-)  We're using Phoenix in lots of different use cases and product areas at  Salesforce: Product Metrics Data Archival Server Metri...
   Author: James Taylor, 2013-02-01, 16:49
[HBASE-6908] Pluggable Call BlockingQueue for HBaseServer - HBase - [issue]
...Allow the BlockingQueue implementation class to be specified in the HBase config to enable different behavior than a FIFO queue. The use case we have is around fairness and starvation for bi...
http://issues.apache.org/jira/browse/HBASE-6908    Author: James Taylor, 2012-10-01, 22:12
Re: HBase aggregate query - HBase - [mail # user]
...No, there's no sorted dimension. This would be a full table scan over  40M rows. This assumes the following: 1) your regions are evenly distributed across a four node cluster 2) unique ...
   Author: James Taylor, 2012-09-13, 19:13
[HBASE-6137] RegionServer-level context and start/stop life-cycle methods for observer coprocessor - HBase - [issue]
...Coprocessors are a great way for an application to affect server-side processing. We're using observer coprocessors via the postScannerOpen to enable a scan to do aggregation. There's curren...
http://issues.apache.org/jira/browse/HBASE-6137    Author: James Taylor, 2012-08-06, 18:19
Re: aggregation performance - HBase - [mail # user]
...We're seen reasonable performance, with the caveat that you need to  parallelize the scan doing the aggregation. In our benchmarking, we have  the client scan each region in parall...
   Author: James Taylor, 2012-05-03, 17:02
[HBASE-5710] NPE in MiniCluster during metadata scan for a pre-split table with multiple column families - HBase - [issue]
...In the MiniCluster test environment, an NPE occurs while scanning regionsof a pre-split table with multiple column families. Without this workingin the test environment, you cannot write uni...
http://issues.apache.org/jira/browse/HBASE-5710    Author: James Taylor, 2012-04-05, 20:37
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