Abstract: A garbage collection process running on a computing device is configured to track the number of garbage collection cycles that storage fragments, called extents, are persisted in storage without being modified or deleted using a lifetime counter that is implemented using metadata. At each garbage collection cycle, the extents are sorted by lifetime values. Old extents (i.e., those existing at the start of the cycle) are bucketed together by lifetime values during garbage collection into new extents (i.e., those being created during the cycle). Thus, each of the new extents includes data having similar lifetime values. The lifetime value for the new extent equals the lowest lifetime value of the old source extent plus one additional increment on the counter. As extents are organized by garbage collection lifetime, placement on storage media can be optimized according to expected endurance requirements.

Abstract: Various methods and systems are provided for implementing classification-based adjustable seek energy settings in storage device systems. In particular, operations support adjusting seek energy settings for storage device components, for executing requests. In operation, a classification is selected for a request. The classification indicates a first priority level for executing the request. The priority level is associated with a first adjustable seek energy setting of a plurality adjustable seek energy settings for executing requests on the hard disk drive system, where a seek energy setting is an adjustable operational speed or energy setting for the hard disk drive system. Based on the classification indicating the priority level, the classification is transmitted to cause the hard disk drive system to set the adjustable seek energy setting. One or more hardware components of the hard disk drive system operates to execute the first request based on the first adjustable seek energy setting.

Abstract: A garbage collection process running on a computing device is configured to track the number of garbage collection cycles that storage fragments, called extents, are persisted in storage without being modified or deleted using a lifetime counter that is implemented using metadata. At each garbage collection cycle, the extents are sorted by lifetime values. Old extents (i.e., those existing at the start of the cycle) are bucketed together by lifetime values during garbage collection into new extents (i.e., those being created during the cycle). Thus, each of the new extents includes data having similar lifetime values. The lifetime value for the new extent equals the lowest lifetime value of the old source extent plus one additional increment on the counter. As extents are organized by garbage collection lifetime, placement on storage media can be optimized according to expected endurance requirements.