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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2017/12/20 20:49:00 UTC

[jira] [Created] (HBASE-19569) Alleviate the bigbang hbase:meta scan on MR startup by passing out target region location

stack created HBASE-19569:
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             Summary: Alleviate the bigbang hbase:meta scan on MR startup by passing out target region location
                 Key: HBASE-19569
                 URL: https://issues.apache.org/jira/browse/HBASE-19569
             Project: HBase
          Issue Type: Task
          Components: mapreduce
            Reporter: stack
            Assignee: stack


Task for myself. Idea is to see if I can pass out the TableSplit location across the cluster and have the MR table Tasks pick up the supplied location and make their first attempt at finding the region using it w/o bothering the hbase:meta. Would go to hbase:meta only if the location they had was failing.

This is general client caching issue -- populating it and getting metrics on how often we go to meta. Apparently we are profligate with our hbase:meta lookups. On a big cluster, it tends to buckle the server carrying hbase;meta. This would give some relief.



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