Title:
【発明の名称】複製されたデータ対象の初期化
Document Type and Number:
Japanese Patent JP2002504249
Kind Code:
A
Abstract:
In a replicated database environment, all nodes (30) monitor the well-being of each other by receipt of node status messages over a network (20). When a node is detected as no longer being alive, the other nodes deduce that such node has failed. When a node failure is detected, a nodestatus record having a nodedown value is written into a node log (80) with respect to the failing node. Similarly, when a node comes alive or a new node becomes known to the network, a node status record having a nodeup value is written into the node log. When a local node fails and then is restarted, the local node uses the contents of its node log in order to determine how to initialize the value of a replicated data object. By reading its node log, the local node can decide whether the data object can be initialized from its disk (32) or not.
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Inventors:
Wikstrom, Claes
Application Number:
JP50425399A
Publication Date:
February 05, 2002
Filing Date:
May 29, 1998
Export Citation:
Assignee:
Telefon Acty Boraget Elm Ericsson
International Classes:
G06F17/30; G06F9/46; G06F11/14; G06F12/00; G06F13/00; (IPC1-7): G06F12/00; G06F13/00; G06F17/30
Attorney, Agent or Firm:
Akira Asamura (3 outside)