stack created HBASE-17786:
-----------------------------
Summary: Create LoadBalancer perf-tests (test balancer algorithm
decoupled from workload)
Key: HBASE-17786
URL: https://issues.apache.org/jira/browse/HBASE-17786
Project: HBase
Issue Type: Sub-task
Components: Balancer, proc-v2
Reporter: stack
Fix For: 2.0.0
(Below is a quote from [~mbertozzi] taken from an internal issue that I'm
moving out here)
Add perf tools and keep monitored balancer performance (a BalancerPE-type
thing).
Most of the balancers should be instantiable without requiring a mini-cluster,
and it easy to create tons of RegionInfo and ServerNames with a for loop.
The balancer is just creating a map RegionInfo:ServerName.
There are two methods to test roundRobinAssignment() and retainAssignment()
{code}
Map<ServerName, List<HRegionInfo>> roundRobinAssignment(
List<HRegionInfo> regions,
List<ServerName> servers
) throws HBaseIOException;
Map<ServerName, List<HRegionInfo>> retainAssignment(
Map<HRegionInfo, ServerName> regions,
List<ServerName> servers
) throws HBaseIOException;
{code}
There are a bunch of obvious optimization that everyone can see just by looking
at the code. (like replacing array with set when we do contains/remove
operations). It will be nice to have a baseline and start improving from there.
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