Cluster (Total compute cost)

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Cluster cost report consists of compute spend, normalized cost per CPU and daily compute cost details views. CAST AI uses public cloud inventory data to calculate cluster compute costs. Custom pricing models are not reflected in our reports at this time.

The report differs depending on the selected date filter, so the information below is split into two sections.

Date filter: This month

  • Current month spend: Sum of all complete days spend + sum of projected
    today's spend

  • Monthly forecast: Takes into account all complete days and forecasts
    spending until the end of the month using 7-day moving average, e.g.,
    tomorrow's average spend is the sum of today's spend + the last 6 days divided
    by 7. The day after tomorrow is calculated similarly, including
    tomorrow's projection.

  • Average daily cost: The sum of all complete days' spend divided by the number of
    complete days.

  • Average cost per CPU:

    • Monthly - A monthly cluster compute cost forecast divided by an average number of provisioned CPUs in the period.
    • Daily - An average daily cluster compute cost divided by an average provisioned CPUs in the period.
    • Hourly - An average hourly cluster compute cost divided by an average provisioned CPUs in the period.

  • Projected end of the day spend: Current day's total spend (complete hours) +
    average spent per hour multiplied by remaining time. This can also be
    broken down by on-demand, fallback, and spot spend.

Date filter: Any past date (day or hour)

  • Compute spend: Actual cluster compute spend in the selected period.

  • Avg. monthly cost: Actual cluster compute spend extrapolated into full
    monthly spend.

  • Avg. daily cost: Total cluster compute cost in the selected period
    divided by days in the selected period.

  • Avg. cost per CPU: Monthly - An avg. monthly cluster compute cost divided
    by an average provisioned CPUs in the period. Daily - An avg. daily cluster
    compute cost divided by an average provisioned CPUs in the period. Hourly -
    An avg. hourly cluster compute cost divided by an average provisioned CPUs in
    the period.

  • Total compute spend: Total cluster cost in the selected period broken
    down by on-demand, fallback, and spot.

Other metrics

Normalized cost per CPU is calculated as follows:

  • Hourly: Average hourly CPU cost divided by an average hourly provisioned CPUs.

  • Daily: Average hourly CPU cost divided by an average hourly provisioned CPUs and multiplied by 24.

  • Monthly: Average hourly CPU cost divided by an average hourly provisioned CPUs and multiplied by 730.

Different cost periods will yield different results, i.e. you can select to view monthly, daily, or hourly CPU cost rate.

Daily compute cost details are calculated similarly (all metrics are calculated per hour):

  • Normalized CPU: Total day's CPU cost divided by day's provisioned CPUs.

  • On-demand: Total day's On-demand CPU cost divided by day's provisioned On-demand CPUs.

  • Spot: Total day's Spot CPU cost divided by day's provisioned Spot CPUs.

  • Fallback: Total day's Fallback CPU cost divided by day's provisioned Fallback CPUs.

Updated 2 months ago