How are Quick Scan estimates calculated?

The Quickscan reports contain a section which estimates both the amount of reduction that can be achieved by NXPowerLite and also the time it may take to compress the files.

Our performance testing was conducted on huge sets of internal test files which have been sourced from customers. We use these to determine both the average reduction percentage for each file format and the time it takes to optimize the dataset. However, we appreciate that actual results can vary enormously from our values due to content, number of files or file types in the dataset.

Estimated File Reduction

The table below shows the reduction values used to calculate the estimated reduction in the Quick Scan report.

Estimated compression time

We divide the 'Before' time in the report by our calculated Compression Time Metric to get the time in minutes we estimate the processing will take. This value is calculated by processing our test data set consisting of customer files, with 10GB of each file type from multiple datasets. Currently, this value is 214. 

This equates to  NXPowerLite Server being able to process about 13GB an hour or 300GB a day (with default settings on our test machine).

Note: The compression time achieved can vary significantly depending on the make-up of the dataset. For example, JPEGs process very quickly. So if your dataset consists mainly of JPEG files processing will likely be quicker than the estimated time.

Test machine specification

Compression time can be affected by many different factors, such as CPU, RAM and network speed. Read Performance tips: Configure NXPowerLite Server for speed for ideas about maximising the throughput of NXPowerLite Server.