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https://issues.apache.org/jira/browse/BEAM-2264?focusedWorklogId=81726&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-81726
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ASF GitHub Bot logged work on BEAM-2264:
----------------------------------------
Author: ASF GitHub Bot
Created on: 19/Mar/18 05:14
Start Date: 19/Mar/18 05:14
Worklog Time Spent: 10m
Work Description: ehrencrona opened a new pull request #4891: [BEAM-2264]
Credentials were not being reused between GCS calls
URL: https://github.com/apache/beam/pull/4891
The `threading.local()` used for storing the `storage_client` in `GcsIO` was
being recreated for every `GcsIO` instance. The consequence was that the client
need to re-authorize for every request. Fixing this improves performance
reading GCS datasets by roughly 15% for me.
`threading.local()` should only be fetched once for all instances.
This Stackoverflow answer describes the mistake in how `threading.local()`
was used:
https://stackoverflow.com/questions/1408171/thread-local-storage-in-python#answer-13240093
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Issue Time Tracking
-------------------
Worklog Id: (was: 81726)
Time Spent: 10m
Remaining Estimate: 0h
> Re-use credential instead of generating a new one one each GCS call
> -------------------------------------------------------------------
>
> Key: BEAM-2264
> URL: https://issues.apache.org/jira/browse/BEAM-2264
> Project: Beam
> Issue Type: Improvement
> Components: sdk-py-core
> Reporter: Luke Cwik
> Assignee: Ahmet Altay
> Priority: Minor
> Time Spent: 10m
> Remaining Estimate: 0h
>
> We should cache the credential used within a Pipeline and re-use it instead
> of generating a new one on each GCS call. When executing (against 2.0.0 RC2):
> {code}
> python -m apache_beam.examples.wordcount --input
> "gs://dataflow-samples/shakespeare/*" --output local_counts
> {code}
> Note that we seemingly generate a new access token each time instead of when
> a refresh is required.
> {code}
> super(GcsIO, cls).__new__(cls, storage_client))
> INFO:root:Starting the size estimation of the input
> INFO:oauth2client.transport:Attempting refresh to obtain initial access_token
> INFO:oauth2client.client:Refreshing access_token
> INFO:root:Finished the size estimation of the input at 1 files. Estimation
> took 0.286200046539 seconds
> INFO:root:Running pipeline with DirectRunner.
> INFO:root:Starting the size estimation of the input
> INFO:oauth2client.transport:Attempting refresh to obtain initial access_token
> INFO:oauth2client.client:Refreshing access_token
> INFO:root:Finished the size estimation of the input at 43 files. Estimation
> took 0.205624818802 seconds
> INFO:oauth2client.transport:Attempting refresh to obtain initial access_token
> INFO:oauth2client.client:Refreshing access_token
> INFO:oauth2client.transport:Attempting refresh to obtain initial access_token
> INFO:oauth2client.client:Refreshing access_token
> INFO:oauth2client.transport:Attempting refresh to obtain initial access_token
> INFO:oauth2client.client:Refreshing access_token
> INFO:oauth2client.transport:Attempting refresh to obtain initial access_token
> INFO:oauth2client.client:Refreshing access_token
> INFO:oauth2client.transport:Attempting refresh to obtain initial access_token
> ... many more times ...
> {code}
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