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From "Gilbert Song" <>
Subject Re: Review Request 39331: Support docker local store pull image simultaneously
Date Tue, 20 Oct 2015 21:22:23 GMT

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(Updated Oct. 20, 2015, 2:22 p.m.)

Review request for mesos, Anand Mazumdar, Jojy Varghese, and Timothy Chen.

Bugs: MESOS-3736

Repository: mesos


Support docker local store pull image simultaneously

Diffs (updated)

  src/slave/containerizer/provisioner/docker/metadata_manager.cpp 2b2de5245bccbd01a856b214ac6525278d794537

  src/slave/containerizer/provisioner/docker/store.cpp 50340131d10222ac06cf21e87ad46943f171d1f6

  src/tests/containerizer/provisioner_docker_tests.cpp 01d3025f59d4a2714a856fe0f3a57192be023990



make check (ubuntu14.04 + clang-3.6)

*This is not ready to be merged.
*Still considering two question:
 1. Handling simultaneous failure. If the first request is called and is written into the
hashmap. All the other requests will be waiting for the future of the first request. But because
its return type is 'Future<vector<string>>', if its future status is 'FAILED/DISCARDED',
the other requests will be waiting forever. 
 2. The current hashmap uses 'stringify(image::name)' as key, but it may not be unique because
there is chance that layer_ids can be changed. One solution is to have 'stringify(image)'
as key.


Gilbert Song

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