Priyesh K created HDDS-13845:
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Summary: Introduce caching layer at Recon for consolidated
capacity distribution data
Key: HDDS-13845
URL: https://issues.apache.org/jira/browse/HDDS-13845
Project: Apache Ozone
Issue Type: Improvement
Components: Ozone Recon
Reporter: Priyesh K
Assignee: Priyesh K
To improve performance and reduce frequent DN endpoint calls, SCM calls and OM
db reads and introduce a caching layer in Recon to store consolidated capacity
distribution data.
This cache will hold precomputed storage metrics such as total used space, free
space, capacity, and per-datanode distribution.
The cache should be periodically refreshed based on a configurable interval or
triggered by data updates.
Recon APIs serving capacity distribution details should first check the cache
before querying the underlying data store.
*Goals:*
* Reduce call to DN endpoints, SCM and OM db hits and API latency.
* Improve responsiveness of capacity distribution dashboard.
* Ensure data consistency with periodic refresh or event-based updates.
*Acceptance Criteria:*
* A caching layer implemented for consolidated capacity distribution data.
* Configurable cache refresh interval.
* APIs read from cache instead of direct DB calls.
* Metrics/logs added to monitor cache hit/miss ratio.
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