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Barrier synchronization method wherein members dynamic voting controls the number of synchronization phases of protocols and progression to each new phase
| Details |
Inventors: Badovinatz, Peter Richard; Brenner, Larry Bert; Chandra, Tushar Deepak; Gopal, Ajei Sarat; Kirby, Orvalle Theodore; Pershing, Jr., John Arthur; Blount, Marion Lee; Kaplan, Marc Adam; Turek, John Joseph Edward;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Treat; William M.
Assistant Examiner: Patel; Gautam R.
Attorney, Agent or Firm: Gonzalez; Floyd A. Heslin & Rothenberg
A barrier synchronization technique in a distributed computing environment. A group of members, including a plurality of related processes executing on one or more processors of the distributed computing environment, is provided a protocol having a dynamic number of synchronization phases. The protocol is voted on by one or more members of the group to determine how the protocol should proceed for the group of members. The protocol may complete successfully, continue to another synchronization phase or be rejected. The group of members determines how many synchronization phases the protocol is to include. |
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DETAILED DESCRIPTION The shortcomings of the prior art are overcome and additional advantages are provided through the provision of a barrier synchronization mechanism.
A group cf members, including a plurality of related processes executing on one or more processors of a distributed computing environment, is provided a protocol.
The protocol is then voted on by one or more members of the group of members.
In one embodiment of the invention, the voting includes providing, by each of the one or more voting members, a vote value indicating how the protocol should proceed.
In one example, the vote value includes one of the following: approve indicating a desire to accept the protocol; continue indicating a desire to proceed to another vote for the protocol; and reject indicating a desire to reject the protocol.
In a further embodiment of the invention, a default vote value is provided for at least one member of the voting members of the group.
In yet a further embodiment of the invention, the voting includes proposing a group state value for the group of members.
In a further example, the voting includes providing a message to the group of members.
In another aspect of the invention, a barrier synchronization mechanism is provided in which a protocol having a dynamic number of synchronization phases is processed.
Voting takes place at one or more of the synchronization phases of the protocol to indicate whether the protocol is to proceed to another synchronization phase.
The voting dynamically controls the number of synchronization phases of the protocol.
In one embodiment, a vote value is provided at each of the one or more synchronization phases to indicate whether the protocol is to proceed to another synchronization phase.
The barrier synchronization technique of the present invention advantageously ensures that all members of the group have reached each synchronization point within the protocol before proceeding.
In addition to indicating that a particular synchronization point has been reached, the technique of the present invention enables additional information to be provided by a member of the group to other members of the group
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