Anoop Sam John created HBASE-17161: -------------------------------------- Summary: MOB : Make ref cell creation more efficient Key: HBASE-17161 URL: https://issues.apache.org/jira/browse/HBASE-17161 Project: HBase Issue Type: Improvement Reporter: Anoop Sam John Assignee: Anoop Sam John Fix For: 2.0.0
When we flush MOB data, ref cells are created per actual MOB cell. This creates lots of garbage Refer MobUtils#createMobRefCell We need to add 2 tags into the ref cell. An ArrayList is created with default size creating ref array. Call to CellUtil.getTags will create a new ArrayList even if the original cell is having no tags. A new KV is created which will create a new backing byte[] and do copy. Also along with each of the flush/compaction op, a fresh Tag object is created for TableName tag. Fixes include 1. A table name tag is not going to change per HStore. Even both the new tags to be added. Will keep a byte[] of these 2 tags at MobHStore level so that all flush and compactions in this store can use it. 2. Create a new MobRefCell just like TagRewriteCell where only value and tags part will be diff from the original cell. -- This message was sent by Atlassian JIRA (v6.3.4#6332)