Method and apparatus for decomposing I/O tasks in a RAID system

A system to process data access requests at a storage system, comprising:

• a processor of the storage system configured to execute a storage operating system, the storage operating system configured to represent components of the storage operating system as a set of objects;
• the storage operating system further configured to receive a data access request directed to the set of objects;
• the storage operating system further configured to decompose the data access request to generate a parent I/O task and a child I/O task;
• the storage operating system further configured to assign the parent I/O task to a first object in the set of objects;
• the storage operating system further configured to assign the child I/O task to a second object in the set of objects;
• the storage operating system further configured to schedule the child I/O task for execution independently from execution of the parent I/O task;
• and
• the storage operating system further configured to execute the child I/O task assigned to the second object.

A non-transitory computer-readable storage medium containing executable program instructions for execution by a processor, the computer-readable storage medium comprising:

• program instructions that represent components of a storage operating system of the storage system as a set of objects, the storage operating system executed by a processor of the storage system;
• program instructions that receive a data access request at the storage system directed to the set of objects;
• program instructions that decompose the data access request to generate a parent I/O task and a child I/O task;
• program instructions that assign the parent I/O task to a first object in the set of objects;
• program instructions that assign the child I/O task to a second object in the set of objects;
• program instructions that schedule the child I/O task for execution independently from execution of the parent I/O task;
• and
• program instructions that execute the child I/O task assigned to the second object.

A system configured to process data access requests at a storage system, comprising:

• means for representing components of a storage operating system of the storage system as a set of objects, the storage operating system executed by a processor of the storage system;
• means for receiving a data access request at the storage system directed to the set of objects;
• means for decomposing the data access request to generate a parent I/O task and a child I/O task;
• means for assigning the parent I/O task to a first object in the set of objects;
• means for assigning the child I/O task to a second object in the set of objects;
• means for scheduling the child I/O task for execution independently from execution of the parent I/O task;
• and
• means for executing the child I/O task assigned to the second object.