Home > Storage > PowerMax and VMAX > Storage Admin > Dell PowerMax: Data Reduction > Activity Based Compression
Activity Based Compression (ABC) aims to prevent constant compression and decompression of data that is accessed frequently. This function allows the busiest data to avoid being compressed. It differentiates busy data from less busy data and accounts for up to 20% of the allocations in the SRP. Allowing the busiest allocations to skip compression is a benefit to the system as well as to end users. This ensures optimal performance and reduced overhead that can result from constantly decompressing frequently accessed data. The mechanism used to determine the busiest data does not add additional load on the system. ABC leverages statistics collected from incoming I/O to the frontend devices to determine what data sets are the busiest and best candidates to skip compression. It allows the system to maintain balance the system resources providing an optimal environment for both data reduction savings and performance.