Ray Mattingly created HBASE-29075:
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             Summary: Balancer conditionals should support system table 
isolation
                 Key: HBASE-29075
                 URL: https://issues.apache.org/jira/browse/HBASE-29075
             Project: HBase
          Issue Type: Improvement
    Affects Versions: 2.6.1
            Reporter: Ray Mattingly
            Assignee: Ray Mattingly


Much like in HBASE-29074 (meta table isolation) we should add support for 
system table isolation via the balancer.

In HBASE-28513 we are adding support for "balancer conditionals" which will 
give the balancer discrete rules to follow when generating plans. The first 
use-case for these conditionals will be replica distribution, but we could also 
add support for system table isolation that works in a much more flexible, 
lightweight, and cost effective way compared to, for example, using 
RegionServer groups.



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