Apparatus, system, and method for destaging cached data

An apparatus to destage cached data, the apparatus comprising:

• a cache controller in communication with a backing store, the cache controller configured to detect one or more write requests to store data in the backing store;
• the cache controller further configured to send the write requests to a storage controller for a nonvolatile solid-state storage device, the storage controller receiving the write requests and caching the data associated with the write requests in the nonvolatile solid-state storage device by appending the data to a log of the nonvolatile solid-state storage device, the log comprising a sequential, log-based structure preserved in the nonvolatile solid-state storage device;
• and
• the cache controller further configured to receive at least a portion of the data from the storage controller in a cache log order and to destage the data to the backing store in the cache log order, the cache log order comprising an order in which the data was appended to the log of the nonvolatile solid-state storage device.

A system to destage cached data, the system comprising:

• a processor;
• a nonvolatile solid-state storage device preserving a log, the log comprising a sequential, log-based structure;
• a backing store;
• one or more communications buses, the nonvolatile solid-state storage device and the backing store in communication with the processor over the one or more communication buses;
• a cache controller in communication with the backing store, the cache controller configured to detect one or more write requests to store data in the backing store;
• the cache controller further configured to send the write requests to a storage controller for the nonvolatile solid-state storage device, the storage controller receiving the write requests and caching the data associated with the write requests in the nonvolatile solid-state storage device by appending the data to the log of the nonvolatile solid-state storage device;
• and
• the cache controller further configured to receive at least a portion of the data from the storage controller in a cache log order and to destage the data to the backing store in the cache log order, the cache log order comprising an order in which the data was appended to the log of the nonvolatile solid-state storage device.