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From Ramkrishna S Vasudevan <ramakrish...@huawei.com>
Subject Load balancer - Static RegionPlans
Date Tue, 30 Aug 2011 14:17:43 GMT


Currently whe load balancer starts balancing a cluster, the balance cluster
algo determines the RS to which the regions has to be moved for balancing.

Assuming initially there are 2 RS and 400 regions.

Now when a new RS comes up a load balancing will start.


Roughly 130+ regions will be shared and those many regions will be scheduled
to be moved to the new RS.


Now after the region plan is assigned if the new RS that came up due to some
reason fails start up, the balancer tries to assign the 130 regions

to this new RS but fails saying Connection Exception.

Anyway the regions will be assigned to another RS once again.


But the master will try 130 times for every region and then decide on
changing the region plan.

Can we optimise this?


Best Regards



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