Viewing Cost Analysis Output

You run cost analysis reports from the Cost Analysis tab. You can access this tab by clicking a move group name in the list on the Move Group List page or the Analysis Summary page for move groups.

Tip

The results of running a Cost Analysis report are not persistent. Navigating away and returning to the Cost Analysis tab results in the calculation starting over.

Cost Analysis output displays a list of any VMs that are excluded from the cost analysis calculations. These are VMs that could not provide the information needed for analysis. There are a number of reasons why VMs fail cost data validation, such as blank columns or bad data format in the data file, a referenced host that does not exist, duplicated VMs, etc. If you want to include any of the excluded compute instances, you need to determine the reason the VM was excluded, correct the issue, then collect data and upload the new file to Virtana Platform.

After running a cost analysis, you can view cost comparisons in the Right Sized Costs Summary on the Cost Analysis tab. This summary displays cost comparisons between CSPs by total cost or split up by cost category.

In the Target Cloud Parameters area you can select several parameters. This allows you to model various "what-if" scenarios to see how different parameter selections affect cost. Note that the functionality associated with Use Current (Avg 100%) is not yet implemented. Currently, only Use 100% should be selected.

Comparison categories include the following:

  • Total Cost

    Compares total on-premise (Source) costs to total costs to move to the various CSPs. To calculate savings, subtract the total for any CSP from the Source total.

  • Right Sized Saving - Source vs In Cloud

    Shows the potential cost savings to move the VMs to a CSP. "Negative savings", or a higher cost to move to a particular CSP, is indicated by the bars displaying to the left.

    Results are based on what is actually being used out of what is allocated.

  • Compute Cost

    Suggests a compute type based on the characteristics of your workload. Recommendation for a balanced workload would be a general purpose compute type, a compute intensive workload would indicate compute optimized type, etc.

  • Storage Cost

  • Network Cost

    Indicates cost for network usage, which can be significant in the cloud.

  • I/O Cost

    Indicates input/output costs, which can be significant in the cloud.

  • Total Cost As-Is

    Results consider the infrastructure allocated to the VMs. Includes CPU cycles and total memory.

Tip

When viewing the Right Sized Costs Summary chart, be sure to scroll down far enough to see the scale at the bottom of the chart. The scale changes as you click through the various cost categories.

At times, moving to a particular CSP configuration might result in higher costs rather than cost savings. In this case, Cost Analysis indicates the "negative savings" in the right-sized savings line chart by presenting the increased cost on the left and the configurations that provide cost savings on the right.

The graph line at the bottom of the chart indicates the amount of savings or additional cost. Hovering over any bar in the chart also provides that information.

vp-mig-csa-summary-neg-savings.png