Storage caching

摘要

The present disclosure provides a method for processing a storage operation in a system with an added level of storage caching. The method includes receiving, in a storage cache, a read request from a host processor that identifies requested data and determining whether the requested data is in a cache memory of the storage cache. If the requested data is in the cache memory of the storage cache, the requested data may be obtained from the storage cache and sent to the host processor. If the requested data is not in the cache memory of the storage cache, the read request may be sent to a host bus adapter operatively coupled to a storage system. The storage cache is transparent to the host processor and the host bus adapter.

主权项

1. A method, comprising:
receiving, in a storage cache, a read request from a storage device driver running on a host processor, wherein the read request identifies requested data; determining whether the requested data is in a cache memory of the storage cache; if the requested data is in the cache memory of the storage cache, obtaining the requested data from the storage cache and sending the requested data to the host processor; and if the requested data is not in the cache memory of the storage cache, sending the read request from a second storage device driver running on the storage cache to a host bus adapter operatively coupled to a storage system by enqueuing the read request in a command queue residing on a memory of the storage cache; wherein the storage cache is transparent to the host processor and the host bus adapter.