Xiaolin Ha created HBASE-27766:
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Summary: Support steal job queue mode for read RPC queues of
RWQueueRpcExecutor
Key: HBASE-27766
URL: https://issues.apache.org/jira/browse/HBASE-27766
Project: HBase
Issue Type: Improvement
Components: rpc
Affects Versions: 2.5.3, 3.0.0-alpha-3
Reporter: Xiaolin Ha
Assignee: Xiaolin Ha
Currently, the RPC queues are distinguished by request type, under most
circumstances of RWQueueRpcExecutor, there are write queues and read queues,
while reads queues are always divided by get requests and scan requests. The
reason why we isolate the scan requests and get requests is that we do not want
large scans block small gets.
Since the handler resources for a regionserver is limited and we can't
dynamicly change the handler ratio by the ratio of requests. We should both
keep large scan the small gets be isolated, and let the idle handlers for the
samller ratio scans to handle some gets when the gets handlers are busy.
This steal queue idea can also used in other circumstances, e.g. idle read
handler steal jobs from write queus.
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