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https://issues.apache.org/jira/browse/MESOS-2073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marco Massenzio updated MESOS-2073:
-----------------------------------
Story Points: 2 (was: 1.5)
> Fetcher cache file verification, updating and invalidation
> ----------------------------------------------------------
>
> Key: MESOS-2073
> URL: https://issues.apache.org/jira/browse/MESOS-2073
> Project: Mesos
> Issue Type: Improvement
> Components: fetcher, slave
> Reporter: Bernd Mathiske
> Assignee: Bernd Mathiske
> Priority: Minor
> Original Estimate: 96h
> Remaining Estimate: 96h
>
> The other tickets in the fetcher cache epic do not necessitate a check sum
> (e.g. MD5, SHA*) for files cached by the fetcher. Whereas such a check sum
> could be used to verify whether the file arrived without unintended
> alterations, it can first and foremost be employed to detect and trigger
> updates.
> Scenario: If a UIR is requested for fetching and the indicated download has
> the same check sum as the cached file, then the cache file will be used and
> the download forgone. If the check sum is different, then fetching proceeds
> and the cached file gets replaced.
> This capability will be indicated by an additional field in the URI protobuf.
> Details TBD, i.e. to be discussed in comments below.
> In addition to the above, even if the check sum is the same, we can support
> voluntary cache file invalidation: a fresh download can be requested, or the
> caching behavior can be revoked entirely.
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