Estimating migration costs for migrating logical partitions within a virtualized computing environment based on a migration cost history

A logically partitioned host system in which a plurality of logical partitions of pools of virtualized resources, and an operating system is operated in each of the logical partitions, comprising:

• a hypervisor operative on the host system to manage the plurality of logical partitions of pools of virtualized resources and operative, responsive to determining that insufficient local resources are available for reservation to meet a performance parameter for at least one resource specified in a reservation request for a particular logical partition managed by the hypervisor in a host system, to identify another logical partition from among the plurality of logical partitions that is assigned at the least one resource meeting the performance parameter specified in the reservation request;
• the hypervisor operative to estimate a first cost of migrating the particular logical partition and a second cost of migrating the another logical partition to at least one other host system based on at least one previously recorded cost stored by the host system of migrating a previous logical partition to the at least one other host system;
• and
• the hypervisor operative to select one of the particular logical partition and the another logical partition as a migration candidate based on a comparison of the first cost with the second cost, wherein the hypervisor negotiates for offers to migrate the migration candidate to the at least one other host system.

A computer program product for managing requests for resources, said computer program product tangibly embodied in a computer-readable storage medium and comprising computer executable instructions which cause a computer to:

• responsive to a hypervisor determining that insufficient local resources are available for reservation to meet a performance parameter for at least one resource specified in a reservation request for a particular logical partition managed by the hypervisor in a host system, identify another logical partition managed by the hypervisor in the host system that is assigned at the least one resource meeting the performance parameter specified in the reservation request;
• estimate, by the hypervisor, a first cost of migrating the particular logical partition and a second cost of migrating the another logical partition to at least one other host system based on at least one previously recorded cost stored by the host system of migrating a previous logical partition to the at least one other host system;
• and
• select, by the hypervisor, one of the particular logical partition and the another logical partition as a migration candidate based on a comparison of the first cost with the second cost, wherein the hypervisor negotiates for offers to migrate the migration candidate to the at least one other host system.