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From "Josh Wills (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CRUNCH-281) Optimize job dependency logic
Date Wed, 16 Oct 2013 22:57:42 GMT

     [ https://issues.apache.org/jira/browse/CRUNCH-281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Josh Wills updated CRUNCH-281:
------------------------------

    Attachment: CRUNCH-281.patch

The patch for this. The fix ended up being pretty simple, so I'm going to commit it this evening
if there aren't any objections.

> Optimize job dependency logic
> -----------------------------
>
>                 Key: CRUNCH-281
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-281
>             Project: Crunch
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.7.0
>            Reporter: Josh Wills
>            Assignee: Josh Wills
>         Attachments: CRUNCH-281.patch
>
>
> In CRUNCH-237, we added a fix to handle a case where jobs could be executed out of dependency
order if a dependency was specified via ParallelDoOptions. The fix for that issue worked,
but was relatively naiive: it forced all of the earlier jobs in a pipeline run to finish before
any subsequent jobs could start, without checking to see if there were implicit/explicit dependencies
between the jobs in those phases. This could increase the overall runtime of a pipeline if
the first phase of a pipeline run had one quick job and one long job and the second phase
of the pipeline had a long running job that only depended on the short-running job, we would
want to kick off the second long running job immediately and not wait for the first long running
job to finish.



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