Data coherency system and method

• US 9,946,649 B1
• Filed: 06/30/2015
• Issued: 04/17/2018
• Est. Priority Date: 06/30/2015
• Status: Active Grant

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Inventors: Natanzon, Assaf, Bromling, Steven R., Baergen, Joshua C., Trachtman, Michael
• Primary Examiner(s): Yi, David X
• Assistant Examiner(s): Talukdar, Arvind
• Application Number:
  US14/755,873
• Time in Patent Office: 1,022 Days
• CPC Class Codes: G06F 12/0815 Cache consistency protocols
• CPC Class Codes: G06F 12/0828 with concurrent directory accessing, i.e. handling multiple concurrent coherency transactions
• CPC Class Codes: G06F 2212/154 Networked environment
• CPC Class Codes: G06F 2212/621 Coherency control relating to peripheral accessing, e.g. from DMA or I/O device
• CPC Class Codes: G06F 3/06 Digital input from, or digital output to, record carriers , e.g. RAID, emulated record carriers or networked record carriers
• CPC Class Codes: G06F 3/062 Securing storage systems
• CPC Class Codes: G06F 3/0637 Permissions
• 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 9/522 Barrier synchronisation

Abstract

A method, computer program product, and computing system for defining an IO splitter module within each of a plurality of nodes included within a hyper-converged storage environment. A coherency module is defined on at least one of the plurality of nodes. A data request is received.

Claims

1. A computer-implemented method, executed on a computing device, comprising:

defining an IO splitter module within each of a plurality of nodes included within a hyper-converged storage environment;

defining a coherency module on at least one of the plurality of nodes;

receiving a data request, wherein the data request is one or more of a data read request and a data write request;

processing a data write request on a local IO splitter module of a local node onto which a data extent is to be written, wherein processing the data write request includes determining a local storage location within the local node and a remote storage location within a remote node; and

locking, via the coherency module, the remote storage location within the remote node into which a remote copy of the data extent is to be written and the local storage location within the local node into which a local copy of the data extent is to be written in response to a single data write request, wherein locking the remote storage location and the local storage location includes;

requesting a lock concerning the remote storage location from the coherency module,

receiving a lock confirmation concerning the remote storage location from the coherency module,

writing the remote copy of the data extent into the remote storage location,

requesting a lock concerning the local storage location from the coherency module,

receiving a lock confirmation concerning the local storage location from the coherency module, and

writing the local copy of the data extent into the local storage location.

2. The computer-implemented method of claim 1 wherein the data request is a data read request for a data extent, the computer-implemented method further comprising:

processing the data read request on a local IO splitter module of a local node that contains the data extent to be read;

locking, via the coherency module, a local storage location within the local node that contains the data extent to be read;

reading the data extent from the local storage location; and

unlocking, via the coherency module, the local storage location within the local node that contains the data extent that was read.

3. The computer-implemented method of claim 2 wherein:

locking, via the coherency module, a local storage location within the local node that contains the data extent to be read includes;

requesting a lock concerning the local storage location from the coherency module, and

receiving a lock confirmation concerning the local storage location from the coherency module; and

unlocking, via the coherency module, the local storage location within the local node that contains the data extent that was read includes;

requesting an unlock concerning the local storage location from the coherency module, and

receiving an unlock confirmation concerning the local storage location from the coherency module.

4. The computer-implemented method of claim 1 further comprising:

unlocking, via the coherency module, the remote storage location; and

unlocking, via the coherency module, the local storage location.

5. The computer-implemented method of claim 4 wherein unlocking, via the coherency module, the remote storage location includes:

requesting an unlock concerning the remote storage location from the coherency module, and

receiving an unlock confirmation concerning the remote storage location from the coherency module.

6. The computer-implemented method of claim 4 wherein unlocking, via the coherency module, the local storage location includes:

requesting an unlock concerning the local storage location from the coherency module, and

receiving an unlock confirmation concerning the local storage location from the coherency module.

7. The computer-implemented method of claim 1 wherein the hyper-converged storage environment includes a first storage environment portion and a second storage environment portion, the first storage environment portion includes a first coherency module, and the second storage environment portion includes a second coherency module.

8. 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:

defining an IO splitter module within each of a plurality of nodes included within a hyper-converged storage environment;

defining a coherency module on at least one of the plurality of nodes;

receiving a data request, wherein the data request is one or more of a data read request and a data write request;

processing the data write request on a local IO splitter module of a local node onto which the data extent is to be written, wherein processing the data write request includes determining a local storage location within the local node and a remote storage location within a remote node; and

locking, via the coherency module, a remote storage location within a remote node into which a remote copy of the data extent is to be written and a local storage location within the local node into which a local copy of the data extent is to be written, wherein locking the remote storage location and the local storage location includes;

requesting a lock concerning the remote storage location from the coherency module,

receiving a lock confirmation concerning the remote storage location from the coherency module,

writing the remote copy of the data extent into the remote storage location,

requesting a lock concerning the local storage location from the coherency module,

receiving a lock confirmation concerning the local storage location from the coherency module, and

writing the local copy of the data extent into the local storage location.

9. The computer program product of claim 8 wherein the data request is a data read request for a data extent, the computer-implemented method further comprising instructions for:

processing the data read request on a local IO splitter module of a local node that contains the data extent to be read;

locking, via the coherency module, a local storage location within the local node that contains the data extent to be read;

reading the data extent from the local storage location; and

unlocking, via the coherency module, the local storage location within the local node that contains the data extent that was read.

10. The computer program product of claim 9 wherein:

locking, via the coherency module, a local storage location within the local node that contains the data extent to be read includes;

requesting a lock concerning the local storage location from the coherency module, and

receiving a lock confirmation concerning the local storage location from the coherency module; and

unlocking, via the coherency module, the local storage location within the local node that contains the data extent that was read includes;

requesting an unlock concerning the local storage location from the coherency module, and

receiving an unlock confirmation concerning the local storage location from the coherency module.

11. The computer program product of claim 8 further comprising instructions for:

unlocking, via the coherency module, the remote storage location; and

unlocking, via the coherency module, the local storage location.

12. The computer program product of claim 11 wherein unlocking, via the coherency module, the remote storage location includes:

requesting an unlock concerning the remote storage location from the coherency module, and

receiving an unlock confirmation concerning the remote storage location from the coherency module.

13. The computer program product of claim 11 wherein unlocking, via the coherency module, the local storage location includes:

requesting an unlock concerning the local storage location from the coherency module, and

receiving an unlock confirmation concerning the local storage location from the coherency module.

14. The computer program product of claim 8 wherein the hyper-converged storage environment includes a first storage environment portion and a second storage environment portion, the first storage environment portion includes a first coherency module, and the second storage environment portion includes a second coherency module.

15. A computing system including a processor and memory configured to perform operations comprising:

defining, by the processor, an IO splitter module within each of a plurality of nodes included within a hyper-converged storage environment;

defining, by the processor, a coherency module on at least one of the plurality of nodes;

receiving, by the processor, a data request, wherein the data request is one or more of a data read request and a data write request;

processing the data write request on a local IO splitter module of a local node onto which the data extent is to be written, wherein processing the data write request includes determining a local storage location within the local node and a remote storage location within a remote node; and

locking, via the coherency module, a remote storage location within a remote node into which a remote copy of the data extent is to be written and a local storage location within the local node into which a local copy of the data extent is to be written, wherein locking the remote storage location and the local storage location includes;

requesting a lock concerning the remote storage location from the coherency module,

receiving a lock confirmation concerning the remote storage location from the coherency module,

writing the remote copy of the data extent into the remote storage location,

requesting a lock concerning the local storage location from the coherency module,

receiving a lock confirmation concerning the local storage location from the coherency module, and

writing the local copy of the data extent into the local storage location.

16. The computing system of claim 15 wherein the data request is a data read request for a data extent, the computer-implemented method further configured to perform operations comprising:

processing the data read request on a local IO splitter module of a local node that contains the data extent to be read;

locking, via the coherency module, a local storage location within the local node that contains the data extent to be read;

reading the data extent from the local storage location; and

unlocking, via the coherency module, the local storage location within the local node that contains the data extent that was read.

17. The computing system of claim 15 wherein the hyper-converged storage environment includes a first storage environment portion and a second storage environment portion, the first storage environment portion includes a first coherency module, and the second storage environment portion includes a second coherency module.