question How to compress existing hBase data using Snappy in Archives of Support Questions (Read Only)

How to compress existing hBase data using Snappy

dheeraj_madaan — Fri, 09 Sep 2016 12:08:11 GMT

Hi, I understand to compress existing HBase table we can use below technique..

disable 'SNAPPY_TABLE'

alter 'SNAPPY_TABLE',{NAME=>'cf1',COMPRESSION=>'snappy'}

enable 'SNAPPY_TABLE'

However did you find a way how to compress existing data, as only new data is getting compressed. Your help is much appreciated.

TIA,

Dheeraj Madan

rchintaguntla — Fri, 09 Sep 2016 12:48:11 GMT

After altering the table you can run major compaction on the table from hbase shell so that existing data will be automatically compressed.

> major_compact 'SNAPPY_TABLE'

dheeraj_madaan — Fri, 09 Sep 2016 20:10:08 GMT

Thanks Rajesh

gvenkat72 — Fri, 26 Oct 2018 02:30:03 GMT

major_compact is not compressing existing data after altering the table to change compression from NONE to SNAPPY