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Posted to issues@hbase.apache.org by GitBox <gi...@apache.org> on 2019/08/12 03:37:51 UTC

[GitHub] [hbase] Reidddddd commented on issue #468: HBASE-22822 : Un/Re-schedule balancer chore with balance_switch

Reidddddd commented on issue #468: HBASE-22822 : Un/Re-schedule balancer chore with balance_switch
URL: https://github.com/apache/hbase/pull/468#issuecomment-520290804
 
 
   IIRC, `gracefully_stop.sh` will turn balancer off, move regions, then turn balancer on.
   
   And there's one script `rolling_restart.sh` relying on `gracefully_stop.sh`, will repeat the mentioned process. If the RS number in rolling restart is large which is often the case in production env---hundreds at least, the master inside will cancel and remove task then construct a new task back and forth, at JVM level.
   
   One step back, current impl brings no harm to master nor good, but the new impl looks like may bring a new uncertainty.
   
   I incline to keep it still, and so, leave my -0.

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