Thomas created HADOOP-14660:
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Summary: wasb: improve throughput by 34% when account limit
exceeded
Key: HADOOP-14660
URL: https://issues.apache.org/jira/browse/HADOOP-14660
Project: Hadoop Common
Issue Type: Improvement
Components: fs/azure
Reporter: Thomas
Assignee: Thomas
Big data workloads frequently exceed the Azure Storage max ingress and egress
limits
(https://docs.microsoft.com/en-us/azure/azure-subscription-service-limits).
For example, the max ingress limit for a GRS account in the United States is
currently 10 Gbps. When the limit is exceeded, the Azure Storage 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. Tests have shown that this improves
throughtput by ~34% when the storage account max ingress and/or egress limits
are exceeded.
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