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From "Chao Shi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-8884) Pluggable RpcScheduler
Date Sat, 06 Jul 2013 15:33:48 GMT
Chao Shi created HBASE-8884:

             Summary: Pluggable RpcScheduler
                 Key: HBASE-8884
                 URL: https://issues.apache.org/jira/browse/HBASE-8884
             Project: HBase
          Issue Type: Improvement
          Components: IPC/RPC
            Reporter: Chao Shi

Today, the RPC scheduling mechanism is pretty simple: it execute requests in isolated thread-pools
based on their priority. In the current implementation, all normal get/put requests are using
the same pool. We'd like to add some per-user or per-region level isolation, so that a misbehaved
user/region will not saturate the thread-pool and cause DoS to others easily. The idea is
similar to FairScheduler in MR. The current scheduling code is not standalone and is mixed
with others (Connection#processRequest). The issue is the first step to extract it to an interface,
so that people are free to write and test their own implementations.

This patch doesn't make it completely pluggable yet, as some parameters are pass from constructor.
This is because HMaster and HRegionServer both use RpcServer and they have different thread-pool
size config. Let me know if you have a solution to this.

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