Skip to main content


Cost trends (EMR)

From the Cost > Trends page, you can view the trend data for EMR clusters. A cost trend chart is a graphical representation of how the cost of EMR clusters changes over time.


Unravel users with admin and read-only admin permissions can access the Cost > Trends page.


The cost trend chart plots the cost and cluster count values on the vertical axis against the date values on the horizontal axis.

When you hover over a trend line in the Cost and Cluster Count sections, the selected trend details are displayed. For example, you can view the trends for the total cost and cluster count for a selected date range (the from date and to date, and an interval along with other filters to the backend). The backend returns a group of data points between the specified time range.


Each data point contains the following three fields and is separated by the time delta equal to the interval:

  • Date: Displays the start interval for the data point for which the cost and cluster count are calculated. The date time format is yyyy-MM-dd'T'HH:mm:ss.SSS'Z'.

  • Cost: Displays the cost of clusters in the Date and Date+Interval time range. You can compare the total cost for a day, month, or year.

  • Count: Displays the number of clusters in Date and Date+Interval

Additionally, the trend number and the scope name are also displayed.

Interval is the DateTime delta between two data points. If the interval is not provided in the request, the backend takes one of the default intervals. The default intervals are based on the delta between from and to dates.

  • delta <= 1 Day: 15 minutes interval (RAW)

  • 1 Day< delta<= 7 days: 1-hour interval

  • 7 Days<delta<=6 Months: 1-day interval

  • 6 Months<delta<=1 Year: 2-day interval

  • delta> 1 year: 7-day interval