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https://issues.apache.org/jira/browse/HDDS-11894?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang updated HDDS-11894:
-----------------------------------
Target Version/s: (was: 2.2.0)
> PreAllocate and Cache Blocks in OM
> ----------------------------------
>
> Key: HDDS-11894
> URL: https://issues.apache.org/jira/browse/HDDS-11894
> Project: Apache Ozone
> Issue Type: New Feature
> Components: Ozone Manager, SCM
> Reporter: Tanvi Penumudy
> Assignee: Tanvi Penumudy
> Priority: Major
> Labels: pull-request-available
>
> Whenever a write operation occurs, OM calls into SCM for allocateBlock. This
> adds overhead to each create request, including added latency to reach the
> create and allocateBlock request, as well as resource starvation as the
> thread in OM is blocked for the duration SCM responds to the call. Frequent
> RPC calls to SCM can become a performance bottleneck under heavy workloads.
> To address this, what if we could prefetch (preallocate) blocks from SCM
> asynchronously and cache them within OM to reduce this dependency on SCM?
> Design Proposal:
> [https://docs.google.com/document/d/1hQAIBClitlVbZRetSPNat9Z-6qZzra8QmWLo1I2WL3k/]
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