EDGE CASE HANDLING IN SYSTEM WITH DYNAMIC FLOW CONTROL

摘要

A storage system includes a storage controller that is configured to receive an input-output (IO) request and to obtain a flow control window size of the storage system. The flow control window size is dynamically adjustable by the storage controller based at least in part on an IO latency of the storage system. The storage controller is configured, in response to determining that an actual size of a portion of the IO request to be processed is greater than the flow control window size, to add an entry corresponding to the portion of the IO request to a flow control queue of the storage system with an indication that the portion of the IO request has an effective size equal to the flow control window size. The storage controller is further configured to process the entry in the flow control queue corresponding to the portion of the IO request using the actual size of the portion of the IO request.