Eric Newton created ACCUMULO-2556:
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Summary: use asynchronous calls to scale BatchReader client calls
Key: ACCUMULO-2556
URL: https://issues.apache.org/jira/browse/ACCUMULO-2556
Project: Accumulo
Issue Type: Bug
Components: client
Reporter: Eric Newton
Presently, the BatchReader uses a thread-pool to make synchronous calls to
tablet servers to fetch data. That limits the number of tablet servers that
can be doing queries in parallel. On very large clusters, clients may not
initiate queries to all of the servers until some queries finish. It is not
practical to create thousands of threads just to initiate queries.
Alternatively, asynchronous calls can efficiently initiate queries an wait for
responses, without using threads just to wait on responses.
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