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Abstract

A distributed storage system includes a first data center including a first host and a first storage subsystem that are coupled to each other via a network. The first host includes a first check module configured to handle a heartbeat signal of first type. The first storage subsystem includes a first storage controller and a first monitoring module. The first monitoring module is configured to handle a heartbeat signal of second type. A second data center includes a second host and a second storage subsystem that are coupled to each other via a network. The second host includes a second check module configured to handle the heartbeat signal of first type. The second storage subsystem includes a second storage controller and a second monitoring module. The second monitoring module is configured to handle the heartbeat signal of second type. A third data center includes a third storage subsystem that are coupled to each other via a network. The third host includes a third check module configured to handle the heartbeat signal of first type. The third storage subsystem including a third storage controller and a third monitoring module. The third monitoring module is configured to handle the heartbeat signal of second type. A first communication network couples the first and second third hosts, wherein the hosts use the first communication network to transmit or receive the heartbeat signal of first type. A second communication network couples the first, second, and third storage subsystems, wherein the subsystems use the second communication network to transmit or receive the heartbeat signal of second type.

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First Claim