International Business Machines Corporation

Saju Mathew

Aaron J Quirk

Edward Raymond Bernal

Jose A Nativio

Giovanni Viera

Rahul Ghosh

Ivan M Heninger

Staton Thomas Bomer

Bernardo Margolis

A method, system and computer program product for selecting a target hypervisor to run a migrated virtual machine. An 'effective priority value,' representing the virtual machine's priority with respect to the other virtual machines running on the same hypervisor, is calculated for the virtual machine when it is running on the source hypervisor as well as if it were to run on a target hypervisor for each possible target hypervisor. The target hypervisor associated with the minimum difference in absolute value terms between the virtual machine's effective priority value calculated when it is running on the source hypervisor and its effective priority value calculated if it were to be migrated to run on a target hypervisor is selected to receive the migrating virtual machine. In this manner, the effective priority metric has enabled a target hypervisor to be chosen that most closely matches the priority environment of the source hypervisor.

Migrating virtual machines based on relative priority of virtual machine in the context of a target hypervisor environment

A method, system and computer program product for selecting virtual machines to be migrated. The page consumption is monitored and recorded for each virtual machine running on a physical machine in a cloud computing node. Those virtual machines with a positive gradient of page consumption that is less than a threshold are placed in a list of virtual machines to be ranked. The virtual machines in the list are ranked based on an increasing order of the relative page consumption value at each sample interval within an observation window of time. A final rank for each virtual machine in the list is computed based on averaging its ranking across each sample interval within the observation window of time. One or more virtual machines are then selected to be migrated to another physical machine that have the lowest final ranking (i.e., with the lowest relative page consumption values).

Selecting virtual machines to be relocated based on memory volatility

A software development and debugging tool is based upon a TCP (Transport Control Protocol) tunnel. The TCP tunnel operates independently without a requirement of pre-configuring a client application or a server application to interoperate with the TCP-tunnel-based debugging utility. Various content-related tests can be performed by modifying the client-generated request messages at the TCP tunnel. Various timing-related tests can be performed by delaying the client-generated requests and/or server-generated responses at the TCP tunnel.

Method and system for a debugging utility based on a TCP tunnel

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Austin, TX, United States of America

Saju Mathew