Aravindan Vijayan created HDDS-2241:
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Summary: Optimize the refresh pipeline logic used by
KeyManagerImpl to obtain the pipeline for a key
Key: HDDS-2241
URL: https://issues.apache.org/jira/browse/HDDS-2241
Project: Hadoop Distributed Data Store
Issue Type: Bug
Components: Ozone Manager
Reporter: Aravindan Vijayan
Assignee: Aravindan Vijayan
Currently, while looking up a key, the Ozone Manager gets the pipeline location
information from SCM through an RPC for every block in the key. For large files
> 1GB, we may end up making ~4 RPC calls for this. This can be optimized in a
couple of ways
* We can implement a batch getContainerWithPipeline API in SCM using which we
can get the pipeline info locations for all the blocks for a file.
* Instead, we can have a method local cache for ContainerID -> Pipeline that we
got from SCM so that we don't need to make calls to SCM again for the same
pipeline.
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