In an embodiment a switching system includes a host, a storage device and at least two links existing between the host and the storage device, wherein the storage device is configured to monitor the at least two links and to send faulty link information to the host when detecting a link fault, and wherein the host is configured to receive the faulty link information sent by the storage device and to switch, based on the faulty link information, a service on a faulty link corresponding to the faulty link information to a normal link in the at least two links.

For efficient high availability for a multi-node cluster using a processor device in a computing environment, using duplicate, standby host-bus adaptors (HBAs) for alternate nodes with respect to a node with the duplicate, standby HBAs using duplicate credentials of active HBAs of the node for shutting down the node, taking an active HBA of the node offline, and/or activating one of the alternate nodes.

A system and method provide a communications link having a plurality of lanes, and an in-band, real-time physical layer protocol that keeps all lanes on-line, while failing lanes are removed, for continuous service during fail over operations. Lane status is monitored real-time at the physical layer receiver, where link error rate, per lane error performance, and other channel metrics are known. If a lane failure is established, a single round trip request/acknowledge protocol exchange with the remote port completes the fail over. If a failing lane meets an acceptable performance level, it remains on-line during the round trip exchange, resulting in uninterrupted link service. Lanes may be brought in or out of service to meet reliability, availability, and power consumption goals.

An apparatus includes a first hardware assist device having at least one transmitter, at least one receiver, and a timer. The at least one transmitter is configured to transmit at least one first signal to a second hardware assist device of a redundant second apparatus. The at least one first signal indicates that the apparatus is functional. The at least one receiver is configured to receive at least one second signal from the second hardware assist device. The at least one second signal indicates that the second apparatus is functional. The timer is configured to control a driver to block transmission of the at least one first signal in response to a fault associated with the apparatus. The apparatus also includes at least one processing device configured to perform one or more actions in response to a loss of the at least one second signal from the second apparatus.

A method of site isolation protection includes the following steps. A set of clustered engines including a first engine at a first site and a second engine at a second site is provided. A Fiber Channel (FC) connection and an Ethernet connection between the first and the second sites are provided. Whether an Ethernet Heartbeat (EH) from one of the first engine and the second engine through the Ethernet connection exists is detected when the FC connection fails. One of the first engine and the second engine is shut down when the EH exists. Furthermore, a quorum service at a client site is provided in different IP domain to further protect site isolation from happening, while the FC connection and Ethernet Heartbeat connection failed at the same time.

One embodiment provides a system that indicates conditions associated with received content. During operation, the system generates, by a first computing device, an interest message which includes a name, wherein the interest message further includes a verification token which is a hash of a nonce. In response to transmitting the interest message to a second computing device, the system receives a content object message which includes a same name as the name for the interest message. In response to detecting a condition associated with the content object message, the system generates a content object return message which includes the nonce and a same name as the name for the content object message. The system forwards the content object return message to the second computing device, thereby facilitating the second computing device to process the content object return message.

Direct monitoring of a plurality of storage nodes in a primary cluster is performed based on connectivity with the storage nodes. Indirect monitoring of a first storage node is performed, in response to direct monitoring of the first storage node indicating failure of the connectivity with the first storage node, wherein a second storage node of the plurality of nodes is a backup node for the first storage node. The indirect monitor of the first storage node indicates failure of the first storage node in response to performance of storage access operations by the second storage node that were previously performed by the first storage node. A cluster-switch operation is initiated to switch to from the primary cluster to a backup cluster based on an occurrence of at least one cluster-failure condition that comprises the indirect monitor of the first storage node indicating failure of the first storage node.

In an industrial automation system, a control device adapted to a container-based architecture has been developed. The control device may comprise one or more containers instantiated with control execution application, communication application, and or redundancy management application.

An electronic apparatus and a hot-swappable storage device thereof are provided. The hot-swappable storage device includes a carrier, a connector, a controller, and a wireless communication interface. The carrier is configured to carry a plurality of storage components. The connector is configured to be electronically connected to a host end for performing a data transfer operation. The controller detects a connection status between the connector and the host end. The wireless communication interface decides whether to perform the data transfer operation according to the connection status.

A fault tolerant computer system and method are disclosed. The system may include a plurality of CPU nodes, each including: a processor and a memory; at least two IO domains, wherein at least one of the IO domains is designated an active IO domain performing communication functions for the active CPU nodes; and a switching fabric connecting each CPU node to each IO domain. One CPU node is designated a standby CPU node and the remainder are designated as active CPU nodes. If a failure, a beginning of a failure, or a predicted failure occurs in an active node, the state and memory of the active CPU node are transferred to the standby CPU node which becomes the new active CPU node. If a failure occurs in an active IO domain, the communication functions performed by the failing active IO domain are transferred to the other IO domain.