[jira] [Created] (HDDS-2241) Optimize the refresh pipeline logic used by KeyManagerImpl to obtain the pipeline for a key

["Aravindan Vijayan (Jira)" <ji...@apache.org>]

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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