Patent ID: 11740792

Abstract:
A data storage system can use non-volatile solid state drives (SSDs) to provide backend storage. The data storage system and SSDs can implement log structured systems (LSSs) experiencing write amplification (WA). The aggregated WA of the LSSs can be minimized when the WAs of both LSSs of the system and SSDs are equal, within a specified tolerance. An amount of storage capacity which the LSS of the data storage system is allowed to use can be limited and vary based on the system's data capacity denoting the storage capacity with valid data. Pm can denote a percentage of Cs, the advertised capacity of the SSDs, storing valid data. Po can be a percentage of Cs denoting the upper bound of the system's used capacity. Po and Pm, as well as the utilization and WA of both the data storage system and SSDs, can be evaluated and adjusted adaptively and holistically.