Bo Cui created HBASE-24925:
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Summary: SCP reduce unnecessary get requests
Key: HBASE-24925
URL: https://issues.apache.org/jira/browse/HBASE-24925
Project: HBase
Issue Type: Improvement
Reporter: Bo Cui
SCP should reduce unnecessary Get request
[https://github.com/apache/hbase/blob/65d28da7c22382e040363c607840d5ab6e6b45da/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ServerCrashProcedure.java#L520]
during startup， the tableNam2State of tableStateManager is not loading
tableState data form metaTable yet. if procThread num is 50 and hbase has 10K
tables, in the worst case, the master needs to query meta table 500K
times(50*10K. and the regions that all SCPs simultaneously check tableState
belong to the same table )
i think master can reduce Get request, and AM#loadMeta can load regions and all
tables
[https://github.com/apache/hbase/blob/65d28da7c22382e040363c607840d5ab6e6b45da/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java#L1532]
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