Gilbert Song created MESOS-3736:
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Summary: Support docker local store get same image simultaneously
Key: MESOS-3736
URL: https://issues.apache.org/jira/browse/MESOS-3736
Project: Mesos
Issue Type: Improvement
Reporter: Gilbert Song
Assignee: Gilbert Song
The current local store implements get() using the local puller. For all
requests of pulling same docker image at the same time, the local puller just
untar the image tarball as many times as those requests are, and cp all of them
to the same directory, which wastes time and bear high demand of computation.
We should be able to support the local store/puller only do these for the first
time, and the simultaneous pulling request should wait for the promised future
and get it once the first pulling finishes.
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