Zheng Hu created HBASE-18806:
--------------------------------
Summary: VerifyRep by snapshot need not to restore snapshot for
each mapper
Key: HBASE-18806
URL: https://issues.apache.org/jira/browse/HBASE-18806
Project: HBase
Issue Type: Bug
Components: Replication
Affects Versions: 2.0.0-alpha-2
Reporter: Zheng Hu
Assignee: Zheng Hu
In following method stack, seems like each mapper task will restore the
snapshot. If we verify replication by a snapshot which has many hfiles,
then we will take long time to restore snapshot. In our cluster, we took
~30min for the snapshot restoring when verify a big table.
{code}
Verifier.map
|--------> replicatedScanner = new TableSnapshotScanner(...)
|-------->
TableSnapshotScanner.init()
|-----> RestoreSnapshotHelper.copySnapshotForScanner
{code}
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