You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@phoenix.apache.org by "Mujtaba Chohan (JIRA)" <ji...@apache.org> on 2017/01/03 22:01:02 UTC

[jira] [Created] (PHOENIX-3559) More disk space used with encoded column scheme with data in sparse columns

Mujtaba Chohan created PHOENIX-3559:
---------------------------------------

             Summary: More disk space used with encoded column scheme with data in sparse columns
                 Key: PHOENIX-3559
                 URL: https://issues.apache.org/jira/browse/PHOENIX-3559
             Project: Phoenix
          Issue Type: Sub-task
            Reporter: Mujtaba Chohan


Schema with 5K columns
{noformat}
create table (k1 integer, k2 integer, c1 varchar ... c5000 varchar CONSTRAINT PK PRIMARY KEY (K1, K2)) 
VERSIONS=1, MULTI_TENANT=true, IMMUTABLE_ROWS=true
{noformat}

In this schema, only 100 random columns are filled with random 15 chars. Rest are nulls.

Data size is *6X* larger with encoded columns scheme compare to non-encoded. That is 12GB/1M rows encoded vs ~2GB/1M rows non-encoded.

When compressed GZ, size with encoded column scheme is still 35% higher.




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)