microsoft / microsoft/finops-toolkit

ADX Dashboard - Savings/Reservation calculation wrong

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Resolution: External Resolution: Support request Tool: Cost Management
Dominant language
PowerShell
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603
Forks
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Avg merge
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Merged PRs (30d)
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Description

🐛 Problem

In 0.8 Azure Data Explorer Dashboard, Rate Optimizations page, the Reservation savings are not properly calculated, showing a negative number, while utilization of Reservations is 100%.
This is happening with MCA contract type.

👣 Repro steps

  1. Go to: Azure Data Explorer 0.8 Dashboard, "Rate optimization" page
  2. Scroll down to: Monthly savings trend (as example)
  3. Click on: "Type:Reservation:Savings
  4. Report shows values in negative amounts

📷 Screenshots

Image

ℹ️ Additional context

Confirmed that "ListCost" field has lower values than "EffectiveCost" for Reservation costs.

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Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at the Azure Data Explorer 0.8 Dashboard's Rate optimization page, especially the Monthly savings trend and the Reservation savings calculation. Reproduce the MCA case and compare the ListCost and EffectiveCost fields; done means Reservation savings no longer show negative values when reservation utilization is 100%.

Written by the indexing model from the issue text.

Assessment

Tech stack
azure
Domain
analytics, cloud
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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