Huaxiang Sun created HBASE-26255:
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Summary: Add an option to use region location from meta table in
TableSnapshotInputFormat
Key: HBASE-26255
URL: https://issues.apache.org/jira/browse/HBASE-26255
Project: HBase
Issue Type: Improvement
Components: mapreduce
Affects Versions: 2.3.6
Reporter: Huaxiang Sun
Assignee: Huaxiang Sun
TableSnapshotInputFormat currently calculates block locality of a region to
decide the best location to run the task. While this works for a small scale
table snapshot, we found that for a table snapshot with many regions, the
locality calculation takes too much time.
In the case of a table with high locality, we can use region location from meta
table to decide a snapshot region's location. Add an option to support it.
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