Write amplification reduction by delaying read access to data written during garbage collection

摘要

The various implementations described herein include systems, methods and/or devices used to enable write amplification reduction by delaying read access to data written during garbage collection. In one aspect, read access to a write unit to which data was written during garbage collection is delayed until a predefined subsequent operation has been completed.

主权项

1. A method of garbage collection in a storage system, the method comprising:
performing a garbage collection operation, including:
writing data, for the garbage collection operation, to a sequence of write units of a non-volatile storage medium block that was erased prior to writing data to the sequence of write units, including:
writing data to a first write unit of the storage medium block; andafter writing data to the first write unit, writing data to at least N write units of the storage medium block, the at least N write units of the storage medium block including a second write unit of the storage medium block, wherein N is a positive integer;after writing data to the at least N write units,
enabling read access to the first write unit;writing data to a subsequent write unit of the storage medium block; andafter writing data to the subsequent write unit, enabling read access to the second write unit.