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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2020/04/10 11:21:51 UTC
[GitHub] [beam] sgraca opened a new pull request #11377: [BEAM-9439] Return
split instead of total backlog size
sgraca opened a new pull request #11377: [BEAM-9439] Return split instead of total backlog size
URL: https://github.com/apache/beam/pull/11377
This merge request changes how backlog bytes are reported by KinesisReader.
Instead of total backlog bytes, which could result in Dataflow pipelines not scaling up,
split backlog is now reported.
The split backlog size can be over-estimated as it reports the size
of the records across all shards (and also assumes that all shards
in the split have the same progress).
This can lead to unnecessary decisions to scale up the number of workers
but will never fail to scale up when this is necessary.
Also the watermark policy of the reader is user configurable and we
don't have a control over it. The calculation of backlog bytes should
always take into account the time that the record was inserted into
Kinesis as this gives accurate results which are independent of
current processing time or any other conditions that reader watermark
can be using. Therefore a separate, fixed policy is used to track
processed records for the backlog calculation.
------------------------
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[GitHub] [beam] aromanenko-dev removed a comment on issue #11377:
[BEAM-9439] Return split instead of total backlog size
Posted by GitBox <gi...@apache.org>.
aromanenko-dev removed a comment on issue #11377: [BEAM-9439] Return split instead of total backlog size
URL: https://github.com/apache/beam/pull/11377#issuecomment-612083684
retest this please
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[GitHub] [beam] sgraca commented on issue #11377: [BEAM-9439] Return split
instead of total backlog size
Posted by GitBox <gi...@apache.org>.
sgraca commented on issue #11377: [BEAM-9439] Return split instead of total backlog size
URL: https://github.com/apache/beam/pull/11377#issuecomment-611989936
R: @aromanenko-dev
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[GitHub] [beam] aromanenko-dev commented on issue #11377: [BEAM-9439] Return
split instead of total backlog size
Posted by GitBox <gi...@apache.org>.
aromanenko-dev commented on issue #11377: [BEAM-9439] Return split instead of total backlog size
URL: https://github.com/apache/beam/pull/11377#issuecomment-612083684
retest this please
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[GitHub] [beam] aromanenko-dev commented on issue #11377: [BEAM-9439] Return
split instead of total backlog size
Posted by GitBox <gi...@apache.org>.
aromanenko-dev commented on issue #11377: [BEAM-9439] Return split instead of total backlog size
URL: https://github.com/apache/beam/pull/11377#issuecomment-612083601
@sgraca Thank you for contribution! I'll take a look on this next week.
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