[jira] [Created] (ATLAS-906) Improve delete robustness/performance

["Jeffrey Hagelberg (JIRA)" <ji...@apache.org>]

Jeffrey Hagelberg created ATLAS-906:
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             Summary: Improve delete robustness/performance
                 Key: ATLAS-906
                 URL: https://issues.apache.org/jira/browse/ATLAS-906
             Project: Atlas
          Issue Type: Task
            Reporter: Jeffrey Hagelberg
            Assignee: Jeffrey Hagelberg


Currently, the delete algorithm works by immediately performing the deletes and property updates that are required.  While this works, it is not very robust.  If there are errors found during the processing, we need to rely on Titan properly rolling back the transaction.  Given that titan does not guarantee that the transactions are strictly ACID compliant, this may not always be a safe thing to do.  This task changes the algorithm to accumulate the changes to be applied in a DeleteContext and only apply them once all of the processing has been done.  This will make the delete operation more robust.  In addition, it increases the chance that Titan (or whatever underlying graph database gets used (see ATLAS-610) can batch the updates and perform them more efficiently (and within a single atomic transaction).



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