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Number of HBase realm servers and data nodes

When setting up an HBase cluster along with Hadoop HDFS, is it advisable to use one region server for HDFS data node, or should the ratio between region servers and data nodes be different from 1: 1?

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You can use any ratio you want, but the rule of thumb is 1: 1. The fewer RS ​​regions have the better, the more RS means fewer regions per server and fewer regions to reassign if a node fails, which will improve recovery times (by and large, despite progress from 0.95: http://hortonworks.com/ blog / introduction-to-hbase-mean-time-to-recover-mttr / )



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