What Is Rollup?
Rollup is the process in which Cloud Eye calculates sample raw data sampled in different periods by using different rollup methods, including Avg., Max., Min., Sum, and Variance. A calculation period is called a rollup period.
The rollup process involves smoothing of data sets. Set a longer rollup interval if you want more smoothing to be performed. If more smoothing is performed, the generated data will be more accurate, enabling you to more accurately predict trends. Set a shorter rollup interval if you want more accurate alarm reporting.
The rollup period can be 5 minutes, 20 minutes, 1 hour, 4 hours, or 1 day.
The methods Cloud Eye uses to process collected data vary depending on the data type:
- If the data is an integer, the data will be rounded.
- If the data is a decimal fraction, two decimal places will be retained. Any further decimal places will be rounded.
For example, the instance quantity in AS is an integer. If the rollup period is 5 minutes, the values of collected metric data are 1 and 4, then the average value is 2 instead of 2.5.
You can choose the proper rollup method to meet your service requirements.
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