System and Method for Standardizing Clocks in a Heterogeneous Networked Environment

• US 20090157905A1
• Filed: 10/09/2008
• Published: 06/18/2009
• Est. Priority Date: 07/11/2003
• Status: Abandoned Application

• Current Assignee: Computer Associates Think Inc. (Broadcom, Inc.)
• Original Assignee: Computer Associates Think Inc. (Broadcom, Inc.)
• Inventors: Davis, Bradford C.
• Application Number:
  US12/248,742
• Publication Number:
  US 20090157905A1
• Time in Patent Office: Days
• US Class Current: 709/248
• CPC Class Codes: G06F 2209/548 Queue
• CPC Class Codes: G06F 8/20 Software design
• CPC Class Codes: G06F 9/542 Event management; Broadcasting; Multicasting; Notifications
• CPC Class Codes: G06F 9/546 Message passing systems or structures, e.g. queues
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks

Abstract

A system and method for standardizing clocks in the heterogeneous networked environment is provided. In one aspect the duration of time that a message takes to travel from a source machine to a destination machine is decomposed into actual duration time T for transmission,—and time difference. C between the source machine and the destination machine. Two T'"'"'s for each leg of a round trip transmission is determined and t˜ using the two T'"'"'s is estimated. A measure of each leg of round trip transmission is determined using t˜ and C. An offset for a machine within a known delta is established.

Claims

1. A method for standardizing clocks in the heterogeneous networked environment, comprising:

decomposing the duration of time that a message takes to travel from a source machine to a destination machine into actual duration time T for transmission, and time difference C between the source machine and the destination machine;

determining two T'"'"'s for each leg of a round trip transmission;

estimating t˜

using the two T'"'"'s;

determining a measure of each leg of round trip transmission using t˜ and

C; and

establishing an offset for a machine within a known delta.

2. The method of claim 1, wherein the establishing further includes:

converging the C value until a known delta is established.

3. The method of claim 1, wherein clock time of the destination machine used to determine the C is estimated.

4. The method of claim 1, wherein clock time of the source machine used to determine the C is actual.