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Posted to commits@beam.apache.org by "Colin Phipps (JIRA)" <ji...@apache.org> on 2017/07/06 09:44:00 UTC

[jira] [Created] (BEAM-2556) Client-side throttling for Datastore connector

Colin Phipps created BEAM-2556:
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             Summary: Client-side throttling for Datastore connector
                 Key: BEAM-2556
                 URL: https://issues.apache.org/jira/browse/BEAM-2556
             Project: Beam
          Issue Type: Improvement
          Components: sdk-java-gcp
            Reporter: Colin Phipps
            Assignee: Colin Phipps
            Priority: Minor


The Datastore connector currently has exponential backoff on errors, which is good. But it does not do any other throttling of its write load in response to errors; once a request succeeds, it resumes writing as quickly as it can.

Write loads will be more stable and more likely to compete if the client throttles itself in the event that it receives high rates of errors from the Datastore service; specifically 
https://landing.google.com/sre/book/chapters/handling-overload.html#client-side-throttling-a7sYUg is a technique that Google has had success with on other services.

We (Datastore) have a patch in progress to add this behaviour to the connector.




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