Failover Mechanism For Distributed Process Execution

• US 20100153481A1
• Filed: 12/16/2008
• Published: 06/17/2010
• Est. Priority Date: 12/16/2008
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Klinker, Boris, Ginkel, Thilo-Alexander, Miltz, Matthias
• Granted Patent: US 8,572,237 B2
• Time in Patent Office: Days
• US Class Current: 709/201
• CPC Class Codes: G06F 15/16 Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs coordinating program control therefor G06F9/52; in regulating and control system G05B
• CPC Class Codes: G06F 2209/505 Clust
• CPC Class Codes: G06F 9/5077 Logical partitioning of resources; Management or configuration of virtualized resources specific details on emulation or internal functioning of virtual machines G06F9/455

Abstract

Methods and apparatus, including computer program products, are provided for distributed process execution. In one aspect, the computer-implemented method may provide an indication announcing that a structural change to the cluster will occur. The indication may enable at least one node of the cluster to respond with an existing view. The existing view may include a first set of authoritative data representing existing processes handled at the at least one node. The method may also include providing, to at least one of the nodes, an index representing a subsequent view of the cluster after the structural change. The subsequent view may include a second set of authoritative data representing processes handled at the at least one node after the structural change. The method may also activate the subsequent view of the cluster. Related apparatus, systems, methods, and articles are also described.

Claims

1. A computer-implemented method comprising:

providing an indication announcing that a structural change to the cluster will occur, the indication enabling at least one node of the cluster to respond with an existing view, the existing view including a first set of authoritative data representing existing processes handled at the at least one node;

providing, to at least one of the nodes, an index representing a subsequent view of the cluster after the structural change, the subsequent view including a second set of authoritative data representing processes handled at the at least one node after the structural change; and

activating the subsequent view of the cluster.

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

determining, by a node joining the cluster, whether there is a cluster master assigned to the cluster.

3. The computer-implemented method of claim 2 further comprising:

assigning, based on the results of determining, the node as the cluster master.

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

registering a node joining the cluster with a cluster master assigned to the cluster.

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

using, as the authoritative data, a reclaim set and a relay set.

6. A computer-readable medium including program code configured to provide a method comprising:

providing an indication announcing that a structural change to the cluster will occur, the indication enabling at least one node of the cluster to respond with an existing view, the existing view including a first set of authoritative data representing existing processes handled at the at least one node;

providing, to at least one of the nodes, an index representing a subsequent view of the cluster after the structural change, the subsequent view including a second set of authoritative data representing processes handled at the at least one node after the structural change; and

activating the subsequent view of the cluster.

7. The computer-readable medium of claim 6 further comprising:

determining, by a node joining the cluster, whether there is a cluster master assigned to the cluster.

8. The computer-readable medium of claim 7 further comprising:

assigning, based on the results of determining, the node as the cluster master.

9. The computer-readable medium of claim 6 further comprising:

registering a node joining the cluster with a cluster master assigned to the cluster.

10. The computer-readable medium of claim 6 further comprising:

using, as the authoritative data, a reclaim set and a relay set.

11. A system comprising:

a processor; and

a memory, the processor and memory configured to provide a method comprising;

providing an indication announcing that a structural change to the cluster will occur, the indication enabling at least one node of the cluster to respond with an existing view, the existing view including a first set of authoritative data representing existing processes handled at the at least one node;

providing, to at least one of the nodes, an index representing a subsequent view of the cluster after the structural change, the subsequent view including a second set of authoritative data representing processes handled at the at least one node after the structural change; and

activating the subsequent view of the cluster.

12. The system of claim 11 further comprising:

determining, by a node joining the cluster, whether there is a cluster master assigned to the cluster.

13. The system of claim 12 further comprising:

assigning, based on the results of determining, the node as the cluster master.

14. The system of claim 11 further comprising:

registering a node joining the cluster with a cluster master assigned to the cluster.

15. The system of claim 11 further comprising:

using, as the authoritative data, a reclaim set and a relay set.