priyeshkaratha opened a new pull request, #8892:
URL: https://github.com/apache/ozone/pull/8892
## What changes were proposed in this pull request?
A new REST API endpoint `/storagedistribution` has been introduced to
provide a summarized view of storage distribution across the cluster. This
endpoint is designed to consolidate various storage-related insights,
particularly focusing on used capacity, pending deletions, and overall data
distribution across Ozone components.
### Key Functionalities
1. **Endpoint Name:** `/storagedistribution`
* Exposes consolidated metrics related to the usage and distribution of
storage.
2. **Data Sources Used:**
* **OMDBInsightEndpoint:**
* Retrieves OM-level data such as bucket-level usage, namespace size,
and used capacity
* **SCMClient:**
* Fetches pending deletion metrics from SCM.
* This includes block-level metadata such as size and replicated size
info for accurate estimation of reclaimable space.
* **Datanode Storage Reports:**
* Gathers current storage usage statistics from individual datanodes.
* Helps in determining used vs available capacity and contributes to
classifying data distribution based on node-wise storage usage.
## What is the link to the Apache JIRA
[HDDS-13465](https://issues.apache.org/jira/browse/HDDS-13465)
## How was this patch tested?
Currently tested by unittestcases by mocking scm and dn data. Also tested
manually using postman.
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