[HDDS-450] Generate BlockCommitSequenceId in ContainerStateMachine for every commit operation in Ratis

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.3.0, 0.4.0
• Component/s: Ozone Datanode
• Target Version/s: 0.3.0
• Assignee: Shashikant Banerjee
• Reporter: Shashikant Banerjee
• Created: 13/Sep/18 11:18
• Updated: 09/Oct/18 17:04
• Resolved: 09/Oct/18 12:38

Description

BlockCommitSequenceId will be increasing long value generated in the Ratis leader for every commit operation of a block and will be replicated over to the followers. This id will be updated in OM and will be reported to SCM which will help the most consistent copy of a open container replica in case the majority of the datanodes fail.

The blockCommitSequenceId is same as the commit index of the flush(PUT_BLOCK) transaction in Ratis.