[HBASE-18305] Initial patch (Core HLC) for public branch

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: HBASE-14070
• Hadoop Flags: Reviewed

Release Note

Adds Core HLC framework (i.e., Clock, Timestamp API) and tests. Practically all of this work has been done by our [~saitejar].

This patch in particular intentionally does not include:
 * undoing using the master's timestamp for meta updates,
 * enabling HLC for meta
 * updating the clock for events like recovery, replication, region open/close.

• Assignee: Amit Patel
• Reporter: Amit Patel
• Created: 30/Jun/17 18:16
• Updated: 17/Jul/17 18:56
• Resolved: 06/Jul/17 20:34

Description

Used for tracking the status of the initial patch for HLC. Core HLC refers to the addition of the HLC framework (i.e., Clock, Timestamp API), integration of said framework with the codebase, and changes to tests. Practically all of this work has been done by our saitejar.

This patch in particular intentionally does not include:

• undoing using the master's timestamp for meta updates,
• enabling HLC for meta
• updating the clock for events like recovery, replication, region open/close.

These changes will be introduced soon in smaller followup commits.

Issue Links

• links to: Review Board (HBASE-14070.HLC)
• links to: Review Board (master)