[TEPHRA-82] Minimize change set retained when using row-level conflict detection

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.5.0
• Component/s: hbase-compat-0.96, hbase-compat-0.98
• Assignee: Gary Helmling
• Reporter: Gary Helmling
• Created: 24/Mar/15 18:51
• Updated: 05/Aug/15 21:45
• Resolved: 16/Apr/15 19:30

Description

Currently the TransactionAwareHTable implementations track change sets at the column level. However, when using row-level conflict detection, we only need to track change sets at the granularity needed to be able to efficiently rollback failed transactions with version-specific deletes. For HBase 0.96+, this means at the column family-level, since deletes support specific versions at the family level.

This will minimize the change set that must be retained by the client.