发明授权
- 专利标题: Time synchronization in cluster systems
- 专利标题(中): 集群系统中的时间同步
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申请号: US12258344申请日: 2008-10-24
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公开(公告)号: US08169856B2公开(公告)日: 2012-05-01
- 发明人: Vikram Rai , Alok Srivastava , Angelo Pruscino , Sameer Joshi
- 申请人: Vikram Rai , Alok Srivastava , Angelo Pruscino , Sameer Joshi
- 申请人地址: US CA Redwood Shores
- 专利权人: Oracle International Corporation
- 当前专利权人: Oracle International Corporation
- 当前专利权人地址: US CA Redwood Shores
- 代理机构: Hickman Palermo Truong & Becker LLP
- 代理商 Christian A. Nicholes
- 主分类号: G04C13/00
- IPC分类号: G04C13/00 ; G04C11/02 ; H04L7/00 ; G06F15/16
摘要:
Techniques are described herein for synchronizing cluster time. According to one technique, a master node is appointed in a cluster. Other “slave” nodes periodically synchronize their clocks with the master node. To synchronize its clock with the master node, a slave node sends a timestamped message to the master node, which also timestamps the message and sends the message back to the slave node, which then timestamps the message again. Based on the timestamps, the slave node is able to determine the difference between the master node's clock's time and slave node's clock's time, compensating for the message travel time between master node and slave node. Depending on various circumstances, and based on the determined difference, the slave node adjusts its clock so that the time indicated by the slave node's clock at least begins to approach more closely the time indicated by the master node's clock.
公开/授权文献
- US20100103781A1 TIME SYNCHRONIZATION IN CLUSTER SYSTEMS 公开/授权日:2010-04-29