Archivo de la etiqueta: HBase

HBase and Zookeeper debugging


I came across some scenarios where an application (i.e. Mapreduce) communicating to HBase through YARN could silently fail with a timeout like the following: 2017-01-30 19:42:03,657 DEBUG [main] org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation: locateRegionInMeta parentTable=hbase:meta, metaLocation=, attempt=9 of 35 failed; retrying after sleep of … Seguir leyendo

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HBase useful commands


1) Connect to HBase. Connect to your running instance of HBase using the hbase shell command, located in the bin/ directory of your HBase install. $ ./bin/hbase shell hbase(main):001:0> 2) Create a table. Use the create command to create a … Seguir leyendo

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NoSQL: Amazon’s DynamoDB and Apache HBase Performance and Modeling notes


The challenge that architects and developers face today is how to process large volumes of data in a timely, cost effective, and reliable manner. There are several NoSQL solutions in the market today, and choosing the right one for your … Seguir leyendo

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HBase Basics


NoSQL? HBase is a type of “NoSQL” database. “NoSQL” is a general term meaning that the database isn’t an RDBMS which supports SQL as its primary access language, but there are many types of NoSQL databases: BerkeleyDB is an example … Seguir leyendo

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