International Business Machines Corporation

Vishal Ramachandra Mansur

Sivakumar Krishnasamy

Niranjan Srinivasan

Nikhil Hegde

Omar Cardona

Kavitha Vittal Murthy Baratakke

Shaival Jagdishbhai Chokshi

Mallesh K Lepakshaiah

Dilip Singh

Kokil Kumar Deuri

Arpana Prashanth

Matthew Ryan Ochs

Rajarshi Das

Jeffrey Paul Messing

Xiaohan Qin

Shajith Chandran

Chidambar Y Kulkarni

Srinivas Gundurao

Sophia Jacob

Arnab Tah

In an approach to intelligent connection placement across multiple logical ports, a mapping table for a virtual machine is created. Responsive to determining that an entry exists in the mapping table for the port on the peer device, whether a virtual function exists the port on the peer device in the mapping table for the same physical function is determined. A virtual function is selected from the mapping table to connect the local port to the port on the peer device.

Intelligent connection placements on SR-IOV virtual functions

In an approach to intelligent connection placement across multiple logical ports, a mapping table for a virtual machine is created. A connection request to connect a local port to a port on a peer device is received. Whether an entry exists in the mapping table for the port on the peer device is determined. Responsive to determining that an entry exists in the mapping table for the port on the peer device, whether a virtual function exists the port on the peer device in the mapping table for the same physical function is determined. A virtual function is selected from the mapping table to connect the local port to the port on the peer device.

Virtual machine mobility for virtual machine using remote direct memory access (RDMA) connections, including: receiving a virtual machine (VM) mobility request to transfer a virtual machine from a source host to a destination host; migrating application data transfer from an RDMA connection of the virtual machine to a Transmission Control Protocol (TCP) connection of the virtual machine, wherein the RDMA connection and the TCP connection are facilitated by a physical network adapter; migrating the TCP connection to a virtual network adapter of the virtual machine; and transferring the virtual machine from the source host to the destination host.

Virtual machine mobility for virtual machines using remote direct memory access connections

Disclosed aspects relate to address space management with respect to a Coherent Accelerator Processor Interface (CAPI) architecture. A shared CAPI component may be established to access a plurality of address spaces of a plurality of assets. The plurality of assets may include both a first asset which corresponds to a first address space of the plurality of address spaces and a second asset which corresponds to a second address space of the plurality of address spaces. A request may be detected to process a set of data and route a set of processed data from the first asset to the second asset. The set of data may be processed to form the set of processed data. The set of processed data may be routed from the first address space to the second address space to fulfill the request.

Address space management with respect to a coherent accelerator processor interface architecture

Provided are techniques for active SEA learning about a client LPAR MAC addresses via address resolution protocol (ARP) packets received on a virtual interface (of the active SEA). Any new client MAC addresses learned on the active SEA are sent to the inactive SEA via a control channel. When SEA failover happens, as the previously inactive SEA is about to become active, it will first send out RARP (reverse ARP) packets with the client MAC addresses as the source MAC addresses respectively. This effectively informs the switch connected to the previously inactive SEA that these client MAC addresses are to be routed through this switch port; the client MAC addresses saved on the switch connected to the previously active SEA are cleared as a result.

SEA failover mechanism with minimized packet losses

A system and technique for dynamic reconfiguration of network devices for outage prediction is disclosed. The system includes a host and a plurality of network devices aggregated to form a link bundle; and wherein the host comprises a configuration manager operable to: identify a quality of service level of data throughput needed by at least one workload utilizing the link bundle; monitor a parameter of each of the network devices of the link bundle; determine whether the monitored parameter indicates a predicted data throughout quality of service level decrease by a network device being utilized by the workload below the quality of service level for the workload; and responsive to determining that the monitored parameter indicates a predicted quality of service level decrease by the respective network device, dynamically reconfigure the link bundle to maintain the quality of service level for the workload utilizing the link bundle.

Dynamic reconfiguration of network devices for outage prediction

An embodiment of the invention is associated with a virtualized environment that includes a hypervisor, client LPARs, and virtual servers that each has a SEA, wherein one SEA is selected to be primary SEA for connecting an LPAR and specified physical resources. A first SEA of a virtual server sends a call to the hypervisor, and in response the hypervisor enters physical adapter capability information, contained in the call and pertaining to the first SEA, into a table. Further in response to receiving the call, the hypervisor decides whether or not the first SEA of the virtual server should then be the primary SEA. The hypervisor sends a return call indicating its decision to the first SEA.

Enhanced failover mechanism in a network virtualized environment

Various systems, processes, and products may be used to manage the transmission and reception of messages. In particular implementations, a system, process, and product for managing message transmission and reception may include the ability to receive a plurality of messages to be transmitted over a communication network, wherein some of the messages have a higher priority and some of the messages have a lower priority, and enqueue descriptors for the messages in a direct memory access queue. The system, process, and product may also include the ability to determine whether an overrun of the queue has occurred, analyze the queue if an overrun has occurred to determine if lower priority messages are associated with any of the descriptors in the queue, and replace, if descriptors for lower priority messages are in the queue, the descriptors for the lower priority messages with descriptors for higher priority messages.

Managing message transmission and reception

Provided are techniques for receiving a packet transmitted in conjunction with a security association associated with Internet Protocol Security (IPSec); determining, based upon the security Association that the packet is faulty; incrementing a count corresponding to previous faulty packets received; determining that the count exceeds a threshold; and disabling IPSec accelerator hardware in response to the determining that the count exceeds the threshold.

Controlling IPSec offload enablement during hardware failures

In a method for managing shared Ethernet adapters in a virtualized computer environment, a computer programmed with a hypervisor program receives a first request from a virtual client to transmit data. In response to receiving the first request, the computer programmed with the hypervisor program selects a first active virtual server from a first plurality of concurrently active virtual servers of the virtualized computer environment. The computer programmed with the hypervisor program copies the data from a memory of the virtual client to a trunk adapter of a first shared Ethernet adapter of the selected first active virtual server.

Aggregating shared Ethernet adapters in a virtualized environment

A network communication device can implement configurable network socket retransmission timeout parameters on a per socket basis. In one embodiment, it is determined, at a first network device, whether to define a network socket with a custom or a default retransmission timeout value to transmit data to a second network device. In response to determining to define the network socket with the custom retransmission timeout value, the network socket is defined with the custom retransmission timeout value, the data is transmitted to the second network device, and it is determined whether response data is received from the second network device prior to expiration of a time period associated with the custom retransmission timeout value. In response to determining that the response data is not received from the second network device prior to the expiration of the corresponding time period, the data is retransmitted to the second network device.

Growing community of inventors

Hubli, India

Vishal Ramachandra Mansur