[kudu-CR] WIP: allow balancing replicas on a per-table instead of global basis

["Todd Lipcon (Code Review)" <ge...@cloudera.org>]

Hello Mostafa Mokhtar,

I'd like you to do a code review.  Please visit

    http://gerrit.cloudera.org:8080/5252

to review the following change.

Change subject: WIP: allow balancing replicas on a per-table instead of global basis
......................................................................

WIP: allow balancing replicas on a per-table instead of global basis

This is a prototype which introduces a new experimental master flag
--global_tablet_balancing_tradeoff. This controls whether the master
will try to balance each table's replicas across the cluster without
regard for existing tables, or whether it will try to place new replicas
on those tablet servers that are currently under-loaded.

Change-Id: Ia5a24d2f580d2ec8585009ee96a2e09493ed5bc2
---
M src/kudu/master/catalog_manager-test.cc
M src/kudu/master/catalog_manager.cc
M src/kudu/master/catalog_manager.h
M src/kudu/master/ts_descriptor.cc
M src/kudu/master/ts_descriptor.h
5 files changed, 67 insertions(+), 38 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/52/5252/1
-- 
To view, visit http://gerrit.cloudera.org:8080/5252
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Ia5a24d2f580d2ec8585009ee96a2e09493ed5bc2
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Todd Lipcon <to...@apache.org>
Gerrit-Reviewer: Mostafa Mokhtar <mm...@cloudera.com>