Replay the required hlog edits to make the backup preserve row atomicity.
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Key: HBASE-4662
URL: https://issues.apache.org/jira/browse/HBASE-4662
Project: HBase
Issue Type: Sub-task
Reporter: Karthik Ranganathan
Assignee: Karthik Ranganathan
The algorithm is as follows:
A. For HFiles:
1. Need to track t1,t2 for each backup (start and end times of the backup)
2. For point in time restore to time t, pick a HFile snapshot which has t2 < t
3. Copy HFile snapshot to a temp location - HTABLE_RESTORE_t
B. For HLogs:
for each regionserver do
for .logs and .oldlogs do
1. log file is hlog.TIME
2. if (t > TIME and hlog.TIME is open for write) fail restore for t
3. Pick the latest HLog whose create time is < t1
4. Pick all HLogs whose create time is > t1 and <= t2
5. Copy hlogs to the right structures inside HTABLE_RESTORE_t
C. Split logs
1. Enhance HLog.splitLog to take timestamp t
2. Enhance distributed log split tool to pass HTABLE_RESTORE_t, so that log
split is picked up and put in the right location
3. Enhance distributed log split tool to pass t so that all edits till t are
included and others ignored
D. Import the directory into the running HBase with META entries, etc (this
already exists)
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