Abstract: Embodiments include a system for implementing multipath selection of ethernet links in a fiber channel over ethernet (FCoE) network. A first VLAN defined a point-to-point path through the ethernet side of the network. A link failure in the first VLAN link is replaced by activating an alternate VLAN link corresponding to a new path through the ethernet side of the network while disabling all other VLANS corresponding to other paths through the ethernet side of the network. An advertisement is received from the origination SAN device on the fiber channel side of the network indicating a request for network access by the origination SAN device. Communications are enabled between the origination SAN device and the destination LAN device via the alternate VLAN link. Communications are then resumed between the origination SAN device and the destination LAN device utilizing the alternate VLAN link.

Abstract: Embodiments relate to an emergency wireless link in a data center comprising a plurality of servers. An aspect includes an emergency wireless link system in a data center comprising a plurality of servers. The emergency wireless link system includes an input interface to receive an input from a sensor coupled to one of the plurality of servers or to an auxiliary system among a plurality of auxiliary systems. The plurality of auxiliary systems includes a power supply system. The system also includes a processor to compare the input with a plurality of conditions, declare an emergency based on the input matching one of the plurality of conditions, and output one or more messages corresponding with the one of the plurality of conditions based on declaring the emergency. The system further includes a transmitter to wirelessly transmit the one or more messages output by the processor.

Abstract: Embodiments relate to a system and method of identifying a cable terminal plug and port on a computer system. An aspect includes a method having a step of positioning a cable plug adjacent to a computer port, the cable plug having a passive transponder. An RF signal is transmitted to the passive transponder. The passive transponder is activated with the RF signal. An identification signal is transmitted based on receiving the RF signal. It is determined that identification signal matches an identification value of the computer port.

Abstract: Embodiments include a system for a multilevel network with inter-layer multipath redundancy between a first network layer of leaf switches and a second network layer of spine switches. Each leaf switch is connected to multiple spine switches to provide multiple inter-layer communication paths between the leaf switches and the spine switches. Each spine switch is assigned a common Layer 2 and 3 network address, while each leaf switch is configured with an inter-layer link selection protocol to selectively connect only one active inter-layer link between the leaf switch and the wide area layer while disabling all other available inter-layer links between the leaf switch and the wide area layer. Alternative inter-layer links is thus activated without requiring the leaf switch to be configured with a new address for the alternate inter-layer link or relying on any multipath functionality implemented within the spine switches.

Abstract: Embodiments include a method, system, and computer program product for managing data flows in a network. A software-defined network controller obtains one or more attributes associated with one or more devices, such as physical layer devices. The obtained attribute(s) are stored in a table. A flow of data in the network is controlled based on the table.

Abstract: A method of providing an emergency wireless link in a data center comprising a plurality of servers includes receiving, at an input interface of an emergency wireless link system at the data center, an input from a sensor coupled to one of the plurality of servers or to an auxiliary system among a plurality of auxiliary systems, the plurality of auxiliary systems including a power supply system. The method also includes comparing, using a processor of the emergency wireless link system, the input with a plurality of conditions, declaring an emergency, using the processor, based on the input matching one of the plurality of conditions, outputting, using the processor, one or more messages corresponding with the one of the plurality of conditions based on declaring the emergency, and transmitting the one or more messages wirelessly.

Abstract: Embodiments include a method and computer program product for a multilevel network with inter-layer multipath redundancy between a first network layer of leaf switches and a second network layer of spine switches. Each leaf switch is connected to multiple spine switches to provide multiple inter-layer communication paths between the leaf switches and the spine switches. Each spine switch is assigned a common Layer 2 and 3 network address, while each leaf switch is configured with an inter-layer link selection protocol to selectively connect only one active inter-layer link between the leaf switch and the wide area layer while disabling all other available inter-layer links between the leaf switch and the wide area layer. Alternative inter-layer links is thus activated without requiring the leaf switch to be configured with a new address for the alternate inter-layer link or relying on any multipath functionality implemented within the spine switches.

Abstract: A computer program product is provided. The computer program product includes a tangible storage medium readable by a processing circuit and on which instructions are stored for execution by the processing circuit for performing a method. The method includes, upon receipt of a command relating to a file stored at a remote location, synchronizing the file between the remote location and a local device, determining whether a list of files linked to the file is stored in the local device, and, in an event the list is stored in the local device, synchronizing the files included in the list between the remote location and the local device.

Abstract: A computer program product is provided. The computer program product includes a tangible storage medium readable by a processing circuit and on which instructions are stored for execution by the processing circuit for, upon receipt of a command relating to a file stored at a remote location, synchronizing the file between the remote location and a local device, determining whether a list of files linked to the file is stored in the local device, and, in an event the list is stored in the local device, synchronizing the files included in the list between the remote location and the local device.

Abstract: An interconnect component is provided fabricated as a preassembled optoelectronic interconnect structure. The interconnect structure has an optical waveguide link with first and second optoelectronic circuits attached to first and second ends of the waveguide link. The optoelectronic circuits include active optical componentry which facilitates optical signal communication across the optical waveguide link. Further, first and second pluralities of electrical contacts are associated with the first and second optoelectronic circuits, respectively, to facilitate electrically, operatively connecting the interconnect structure between first and second components of an electronic assembly as, for instance, a single, field-replaceable unit. The first and second components of the electronic assembly may be, for instance, stacked electronic components of the electronic assembly, or laterally offset components of a substantially planar electronic assembly.

Abstract: Fabricating preassembled optoelectronic interconnect structures is provided, which have an optical waveguide link with first and second optoelectronic circuits attached to first and second ends of the waveguide link. The optoelectronic circuits include active optical componentry which facilitates optical signal communication across the optical waveguide link. Further, first and second pluralities of electrical contacts are associated with the first and second optoelectronic circuits, respectively, to facilitate electrically, operatively connecting the interconnect structure between first and second components of an electronic assembly as, for instance, a single, field-replaceable unit. The first and second components of the electronic assembly may be, for instance, stacked electronic components of the electronic assembly, or laterally offset components of a substantially planar electronic assembly.

Abstract: Maintaining bandwidth in links between servers and storage arrays comprising a device. The device establishes the links. The device identifies a first link from the links. The first link has a high response time. The device transmits a plurality of data packets on the first link. Each data packet is associated with a corresponding acknowledgment (ACK). The transmission is performed without waiting for the corresponding ACK to be received. The device tracks the ACK received in response to each of the transmitted data packets. The device detects a failure of the first link. In response to the detection, the device identifies invalid data packets. The invalid data packets comprise data packets transmitted on the first link after the detected failure.

Abstract: Maintaining bandwidth in links between servers and storage arrays comprising a device. The device establishes the links. The device identifies a first link from the links. The first link has a high response time. The device transmits a plurality of data packets on the first link. Each data packet is associated with a corresponding acknowledgment (ACK). The transmission is performed without waiting for the corresponding ACK to be received. The device tracks the ACK received in response to each of the transmitted data packets. The device detects a failure of the first link. In response to the detection, the device identifies invalid data packets. The invalid data packets comprise data packets transmitted on the first link after the detected failure.

Abstract: Data access is facilitated by employing local caches and an adaptive caching strategy. Specific data is stored in each local cache and consistency is maintained between the caches. To maintain consistency, adaptive caching structures are used. The members of an adaptive caching structure are selected based on a sharing context, such as those members having a chosen association identifier or those members not having the chosen association identifier.

Abstract: An energy management system for a data center network may include a central computer to establish an energy use policy for the computer data center network. The system may also include computer nodes in the computer data center network to receive a packet which is a query that obtains energy information from the nodes and/or a transmission reservation that provides instructions for the energy use policy to be implemented at the computer nodes. The computer nodes may reallocate data traffic on the computer data center network based on the energy use policy to improve energy consumption of the computer data center network.

Abstract: A redundant power supply configuration for a data center is provided. A method includes receiving instructions to operate power supplies at a high current mode. An individual current for each of the power supplies is calculated to total a high current at the high current mode. The power supplies are operated at the high current mode to provide the high current at the high current mode. In response to operation at the high current mode being complete, the power supplies are operated at a normal mode to provide a normal current at the normal current mode.

Abstract: A system is provided. The system includes a computing device by which first and second commands are inputted, first and second resources disposed in communication with the computing device to be receptive of the first command and responsive to the first command with first and second energy demands in first and second response times, respectively and a managing unit. The managing unit is disposed in communication with the computing device to be receptive of the first and second commands and with the first and second resources to allocate tasks associated with the first command to one of the first and second resources. The tasks are allocated in accordance with the second command and the second command is based on the first and second energy demands and the first and second response times.

Abstract: Detecting and recovering from soft errors in a network comprising a first device. A first device receives a first data packet. Responsive to receiving a second data packet, the first device determines whether the two data packets are identical. Responsive to the determination that the two data packets are not identical, the first device discards the two data packets, and requests retransmission of the two data packets.

Abstract: A redundant power supply configuration for a data center is provided. A method includes receiving instructions to operate power supplies at a high current mode. An individual current for each of the power supplies is calculated to total a high current at the high current mode. The power supplies are operated at the high current mode to provide the high current at the high current mode. In response to operation at the high current mode being complete, the power supplies are operated at a normal mode to provide a normal current at the normal current mode.

Abstract: An improved database system may include a root-server including a computer processor. The system may also include a segment-server including a computer processor, the segment-server to store data based upon the data's frequency of use by a client who is closer to the segment-server than the root-server and any other segment-server in the system, and the data stored is at least write data. The system may further include a consistency unit to update the root-server based upon data stored by the segment-server and client.