Matteo Bertozzi created HBASE-11598:
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Summary: Add simple rpc throttling
Key: HBASE-11598
URL: https://issues.apache.org/jira/browse/HBASE-11598
Project: HBase
Issue Type: New Feature
Reporter: Matteo Bertozzi
Assignee: Matteo Bertozzi
Priority: Minor
Fix For: 1.0.0, 2.0.0
Add a simple version of rpc throttling.
(by simple I mean something that requires less changes as possible to the core)
The idea is to add a hbase:quota table to store the user/table quota
information.
Add a couple of API on the client like throttleUser() and throttleTable()
and on the server side before executing the request we check the quota, if not
an exception is thrown.
The quota will be per-machine. There will be a flag "QuotaScope" that will be
used in the future to specify the quota at "cluster level" instead of per
machine. (A limit of 100req/min means that each machine can execute 100req/min
with a scope per-machine).
This will be the first cut, simple solution that requires verify few changes to
the core.
Later on we can make the client aware of the ThrottlingException and deal with
it in a smarter way.
Also we need to change a bit the RPC code to be able to yield the operation if
the quota will be
available not to far in the future, and avoid going back to the client for "few
seconds".
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