HBase read : To improve on performance , how to do batch processing of get request using hbase java REST api

Question

I am new to HBase REST API and was trying to find a way, that I could get a set of results for a set of Id's I would be doing a with a get command. As batch processing would help improve the performance of my code, instead of making a get request for each id for a table.

Some example Hbase java rest api code would be helpful.

thanks, in advance.

Answer 1

You should able to achieve it using scanner (HBase search API). Below e.g.

Scan scan = new Scan();
scan.setTimeRange( lowerBound, upperBound );

 Call it for each Column
scan.addColumn //

scan.setCaching( 1000 ) // how many rows for caching that will be passed to scanners.
ResultScanner scanner = table.getScanner( scan );
Iterator< Result > iterator = scanner.iterator();

There are plenty of articles available to get more detail e.g. https://www.cloudera.com/documentation/enterprise/5-4-x/topics/admin_hbase_scanning.html