Updating data objects on a system

• US 10,171,257 B2
• Filed: 06/22/2016
• Issued: 01/01/2019
• Est. Priority Date: 06/22/2016
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Crasta, Alol A., Patil, Harshal S., Pillai, Kishorekumar G., Raisch, Christoph, Ranjan, Nishant
• Primary Examiner(s): Nguyen, Tu T
• Application Number:
  US15/189,332
• Publication Number:
  US 20170373865A1
• Time in Patent Office: 923 Days
• Field of Search: 709226
• CPC Class Codes: G06F 16/00 Information retrieval; Database structures therefor; File system structures therefor
• 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 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: H04L 12/185 with management of multicast group membership
• CPC Class Codes: H04L 45/16 Multipoint routing
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1095 Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
• 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]
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching

Abstract

A computer system includes a first server including a first data management module and a second server including a second data management module, and a first and second storage controller. The first and second storage controllers are interconnected by a network configured for reliable data multicasting. The computer system further includes a cross system manager for controlling one or more core storage functions on each of the first and second storage controllers. The computer system further includes computer program instructions to, responsive to a core storage function triggered by the cross system manager: Create a multicast group for each of the first server and the second server in the network, wherein the multicast group is created by a reliable multicast mechanism, and Multicast data write operations of each of the first server and the second server to the first storage controller and the second storage controller of the multicast group.

Claims

1. A computer system for updating data objects across a storage area network, the computer system comprising:

one or more computer processors;

one or more computer readable storage media;

computer program instructions;

the computer program instructions being stored on the one or more computer readable storage media; and

the computer program instructions comprising instructions to;

identify a request directed to a first server to perform a first core storage function for a first data object stored on a first storage device, the first core storage function being at least one of (i) real-time replication or (ii) real-time mirroring;

generate, in response to identifying the request to perform the first core storage function, a multicast group, wherein the multicast group includes at least;

(i) the first server, (ii) a first storage controller located on the first storage device, (iii) a second server, and (iv) a second storage controller located on a second storage device;

multicast, via a reliable multicast, a first set of data write operations associated with the first core storage function to;

(i) the first storage controller, (ii) the second server, and (iii) the second storage controller included in the multicast group; and

update, based on the first set of write operations multicasted to the multicast group;

(i) the first data object stored on the first storage device, and (ii) a second data object stored on the second storage device, wherein the second data object is a replica of the first data object.

2. The computer system of claim 1, further comprising:

a first host port manager being implemented on the first storage controller for managing a first storage network adaptor; and

a second host port manager being implemented on the second storage controller for managing a second storage network adaptor.

3. The computer system of claim 2, further comprising:

one or more first host bus adapters implemented on at least one of the first network adapter and the first storage controller for accessing at least one of the first server and the first storage device; and

one or more second host bus adapters implemented on at least one of the second network adapter and the second storage controller for accessing at least one of the second server and the second storage device.

4. The computer system of claim 1, wherein the multicast group is identified by at least one of a world-wide unique identifier and a unique identifier.

5. The computer system of claim 1, further comprising:

a cross system manager implemented as a distributed system wherein the cross system manager controls one or more critical storage functions on each of the first storage controller and the second storage controller.

6. The computer system of claim 1, wherein the storage area network is at least one of a fibre channel network and an internet protocol.

7. The computer system of claim 1, wherein the first server and the second server comprises at least one of a physical server and a virtual server.

8. The computer system of claim 1, wherein each of the first server and the second server include a solid state data cache device.

9. The computer system of claim 1, further comprising program instructions to:

update data objects based on data write instructions received via multicast in priority to data write instructions received via a bulk copy mechanism.

10. A computer program product for updating data objects for updating data objects across a storage area network, the computer program product comprising one or more computer readable storage media and program instructions stored on the one or more computer readable storage media, the program instructions comprising instructions to:

identify a request directed to a first server to perform a first core storage function for a first data object stored on a first storage device, the first core storage function being at least one of (i) real-time replication or (ii) real-time mirroring;

generate, in response to identifying the request to perform the first core storage function, a multicast group, wherein the multicast group includes at least;

(i) the first server, (ii) a first storage controller located on the first storage device, (iii) a a second server, and (iv) a second storage controller located on a second storage device;

multicast, via a reliable multicast, a first set of data write operations associated with the first core storage function to;

(i) the first storage controller, (ii) the second server, and (iii) the second storage controller included in the multicast group; and

update, based on the first set of write operations multicasted to the multicast group;

(i) the first data object stored on the first storage device, and (ii) a second data object stored on the second storage device, wherein the second data object is a replica of the first data object.

11. The computer-program product of claim 10, further comprising program instructions to:

update data objects based on data write instructions received via multicast in priority to data write instructions received via a bulk copy mechanism.