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From "Sneha Varma (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-15703) AzureBlobFS - implement client-side throttling
Date Wed, 29 Aug 2018 04:50:00 GMT
Sneha Varma created HADOOP-15703:
------------------------------------

             Summary: AzureBlobFS - implement client-side throttling 
                 Key: HADOOP-15703
                 URL: https://issues.apache.org/jira/browse/HADOOP-15703
             Project: Hadoop Common
          Issue Type: Sub-task
            Reporter: Sneha Varma


Big data workloads frequently exceed the AzureBlobFS max ingress and egress limits (https://docs.microsoft.com/en-us/azure/storage/common/storage-scalability-targets).
For example, the max ingress limit for a GRS account in the United States is currently 10
Gbps. When the limit is exceeded, the AzureBlobFS service fails a percentage of incoming requests,
and this causes the client to initiate the retry policy. The retry policy delays requests
by sleeping, but the sleep duration is independent of the client throughput and account limit.
This results in low throughput, due to the high number of failed requests and thrashing causes
by the retry policy.

To fix this, we introduce a client-side throttle which minimizes failed requests and maximizes
throughput. 



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