For data compression it uses the LZ4 format [1] (real-time LZ77-like data compressor -without entropy encoding, just string references and literals-, with small

For data compression it uses the LZ4 format [1] (real-time LZ77-like data compressor -without entropy encoding, just string references and literals-, with small blocks so its LUT-based O(1) search is always in the data cache). [1] https://rhelblog.redhat.com/2018/02/05/understanding-the-concepts-behind-virtual-data-optimizer-vdo-in-rhel-7-5-beta/ https://rhelblog.redhat.com/2018/02/05/understanding-the-con...