Backup system and backup method
First Claim
1. A failover method used for a system,the system including:
- a primary site having;
multiple nodes that provide a task; and
a first storage system allocated to the nodes; and
a secondary site having;
multiple nodes that can provide a task; and
a second storage system allocated to the nodes,the method allowing, if a failure occurs to a node of the primary site, the task to be taken over by a node of the primary site or a node of the secondary site,the method comprising the steps of;
setting a priority of a failover for the respective nodes of the primary site;
setting a failover destination of the respective nodes of the primary site to one of a node of the secondary site and a node of the primary site based on a correspondence set in advance between a priority and an extent of the failover destination;
backing up data from a node of the primary site to a node of a determined failover destination;
causing the node of the failover destination and the node of the primary site to mutually detect a failure; and
causing the node of the failover destination to take over a task if the node of the failover destination detects a failure of the node of the primary site.
1 Assignment
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Accused Products
Abstract
Provided is a method causing a node of a local site or of a remote site to take over a file server when a failure occurs to a node of the local site. The method includes the steps of: setting a priority of the failover to the respective nodes of the local site; setting a failover destination of the respective nodes of the local site to a node of the remote site or the local site based on correspondences between the priority and an extent of the failover destination set in advance; backing up data to respective nodes of the determined failover destination; causing the failover destinations and nodes to mutually detect a failure; and causing a node of the failover destination to take over a task if the node of the failover destination detects a failure.
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Citations
17 Claims
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1. A failover method used for a system,
the system including: -
a primary site having; multiple nodes that provide a task; and a first storage system allocated to the nodes; and a secondary site having; multiple nodes that can provide a task; and a second storage system allocated to the nodes, the method allowing, if a failure occurs to a node of the primary site, the task to be taken over by a node of the primary site or a node of the secondary site, the method comprising the steps of; setting a priority of a failover for the respective nodes of the primary site; setting a failover destination of the respective nodes of the primary site to one of a node of the secondary site and a node of the primary site based on a correspondence set in advance between a priority and an extent of the failover destination; backing up data from a node of the primary site to a node of a determined failover destination; causing the node of the failover destination and the node of the primary site to mutually detect a failure; and causing the node of the failover destination to take over a task if the node of the failover destination detects a failure of the node of the primary site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A backup system, comprising:
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a primary site comprising; multiple nodes that provide a task; and a first storage system allocated to the corresponding nodes; a secondary site comprising; multiple nodes that provide a task; and a second storage system allocated to the corresponding nodes; and a network connecting the primary site and the secondary site with each other;
wherein;a node of the secondary site takes over a task of a node of the primary site if a failure occurs to the node of the primary site; the node of the primary site comprises; a priority setting unit for setting a priority of a failover for the respective nodes of the primary site; a cluster setting unit for setting a failover destination of the respective nodes of the primary site to one of a node of the secondary site and a node of the primary site based on the specified priority; a first failure detecting unit for cooperating with a node of the specified failover destination to monitor a failure; a backup processing unit for baking up data of itself to the node of the specified failover destination; and a first failover processing unit for taking over a task of the node to be monitored if the first failure detecting unit detects a failure; and the node of the secondary site comprises; a second failure detecting unit for cooperating with a node of a failover source to monitor a failure; and a second failover processing unit for causing the specified node to take over a task of the monitored node if a failure is detected. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification