System and method for managing IO operations

• US 8,671,229 B1
• Filed: 06/30/2012
• Issued: 03/11/2014
• Est. Priority Date: 06/30/2012
• Status: Active Grant

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: EMC Corporation (Dell Technologies Inc.)
• Inventors: Taylor, Alan L., Haynes, Michael D., de Forest, Miles A.
• Primary Examiner(s): Tseng, Cheng-Yuan
• Application Number:
  US13/539,435
• Time in Patent Office: 619 Days
• Field of Search: None
• US Class Current: 710/29
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]

Abstract

A method, computer program product, and computing system for receiving an IO request from a host concerning an IO operation to be performed on a data array. The IO request is processed to generate an IO descriptor. The IO descriptor defines a unique and proprietary memory space for each of a plurality of IO processing routines.

Claims

1. A computer-implemented method comprising:

receiving an IO request from a host concerning an IO operation to be performed on a data array;

processing the IO request to generate an IO descriptor, wherein the IO descriptor defines a unique and proprietary memory space for each of a plurality of IO processing routines;

receiving a cancellation request from the host concerning the IO request;

broadcasting the cancellation request to each of the plurality of IO processing routines;

receiving a status report from each of the plurality of IO processing routines, wherein each status report identifies whether or not each of the IO processing routines processed the IO request; and

releasing the unique and proprietary memory space for each of the plurality of IO processing routines.

2. The computer-implemented method of claim 1 wherein the IO operation is chosen from the group consisting of:

a data read operation; and

a data write operation.

3. The computer-implemented method of claim 1 wherein the IO processing routines include one or more of:

a compression/decompression IO processing routine;

a deduplication IO processing routine; and

a zero detection IO processing routine.

10. The computer-implemented method of claim 1 wherein releasing the unique and proprietary memory space for each of the plurality of IO processing routines includes returning the unique and proprietary memory space to available memory for use in future IO descriptors.

4. A computer program product residing on a non-transitory computer readable medium having a plurality of instructions stored thereon which, when executed by a processor, cause the processor to perform operations comprising:

receiving an IO request from a host concerning an IO operation to be performed on a data array;

processing the IO request to generate an IO descriptor, wherein the IO descriptor defines a unique and proprietary memory space for each of a plurality of IO processing routines;

receiving a cancellation request from the host concerning the IO request;

broadcasting the cancellation request to each of the plurality of IO processing routines;

receiving a status report from each of the plurality of IO processing routines, wherein each status report identifies whether or not each of the IO processing routines processed the IO request; and

releasing the unique and proprietary memory space for each of the plurality of IO processing routines.

5. The computer program product of claim 4 wherein the IO operation is chosen from the group consisting of:

a data read operation; and

a data write operation.

6. The computer program product of claim 4 wherein the IO processing routines include one or more of:

a compression/decompression IO processing routine;

a deduplication IO processing routine; and

a zero detection IO processing routine.

11. The computer program product of claim 4 wherein releasing the unique and proprietary memory space for each of the plurality of IO processing routines includes returning the unique and proprietary memory space to available memory for use in future IO descriptors.

7. A computing system including at least one processor and at least one memory architecture coupled with the at least one processor, wherein the computing system is configured to perform operations comprising:

receiving an IO request from a host concerning an IO operation to be performed on a data array;

processing the IO request to generate an IO descriptor, wherein the IO descriptor defines a unique and proprietary memory space for each of a plurality of IO processing routines;

receiving a cancellation request from the host concerning the IO request;

broadcasting the cancellation request to each of the plurality of IO processing routines;

receiving a status report from each of the plurality of IO processing routines, wherein each status report identifies whether or not each of the IO processing routines processed the IO request; and

releasing the unique and proprietary memory space for each of the plurality of IO processing routines.

8. The computing system of claim 7 wherein the IO operation is chosen from the group consisting of:

a data read operation; and

a data write operation.

9. The computing system of claim 7 wherein the IO processing routines include one or more of:

a compression/decompression IO processing routine;

a deduplication IO processing routine; and

a zero detection IO processing routine.

12. The computing system of claim 7 wherein releasing the unique and proprietary memory space for each of the plurality of IO processing routines includes returning the unique and proprietary memory space to available memory for use in future IO descriptors.