Ankur Goenka created BEAM-9752:
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Summary: Too many shards in GCS
Key: BEAM-9752
URL: https://issues.apache.org/jira/browse/BEAM-9752
Project: Beam
Issue Type: Bug
Components: sdk-py-core, sdk-py-harness
Reporter: Ankur Goenka
We have observed case where the data was spread very thinly over automatically
computed number of shards.
This caused wait for the buffers to fill before sending the data over to gcs
causing upload timeout as we did not upload any data for while waiting.
However, by setting an explicit number of shards (1000 in my case) solved this
problem potentially because all the shards had enough data to fill the buffer
write avoiding timeout.
We can improve the sharding logic so that we don't create too many shards.
Alternatively, we can improve connection handling so that the connection does
not timeout.
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