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HDDS-14558. [Recon] Show fs reserved space in datanodes page table under Storage Capacity#9709

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priyeshkaratha wants to merge 1 commit intoapache:masterfrom
priyeshkaratha:HDDS-14558
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HDDS-14558. [Recon] Show fs reserved space in datanodes page table under Storage Capacity#9709
priyeshkaratha wants to merge 1 commit intoapache:masterfrom
priyeshkaratha:HDDS-14558

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What changes were proposed in this pull request?

On the Recon Datanode page, the Storage Capacity section currently displays Filesystem Capacity and Ozone Capacity. The difference between these two values represents the reserved space, but this is not explicitly shown, which can be confusing for users.

This pull request improves clarity by explicitly exposing the reserved space value. To achieve this, the existing datanode backend endpoint has been updated to return the correct reserved space, and the UI has been enhanced to display this value alongside the existing capacity metrics.

What is the link to the Apache JIRA

HDDS-14558

How was this patch tested?

Patch is tested manually
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@priyeshkaratha priyeshkaratha changed the title HDDS-14558. Show fs reserved space in datanodes page table under Storage Capacity HDDS-14558. [Recon] Show fs reserved space in datanodes page table under Storage Capacity Feb 4, 2026
@priyeshkaratha priyeshkaratha marked this pull request as ready for review February 5, 2026 04:04
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