Workload reallocation involving inter-server transfer of software license rights and intra-server transfer of hardware resources

1. A computer-implemented method of managing a centrally managed system of servers, said method comprising:

while a target workload is running in a target partition of a target hardware server using a first amount of hardware resources, assigning a second amount of hardware resources to said target partition in excess of a licensed amount of said hardware resources on which said first workload is licensed to run under a software license associated with said first workload, said target workload including an operating system or an application;

increasing said licensed amount to at or above said second amount at least in part by using an inter-server transfer of software license rights from a source workload running on a source hardware server to said target workload; and

allocating said second amount of said hardware resources to said target partition at least in part by using an intra-server transfer of said hardware resources from a source partition of said target hardware server to said target partition.

2. A method as recited in claim 1 further comprising updating software licenses before increasing said second amount.

3. A method as recited in claim 1 further comprising inactivating hardware on said source hardware server before transferring software licenses to said target workload.

4. A method as recited in claim 1 further comprising recording configuration changes due to said transfers of said software license rights and said hardware resources.

5. A computer system comprising:

a first hardware server having first and second partitions and a first workload running on said first partition, said first workload including an operating system or an application;

a second hardware server running a second workload;

management hardware storing workload allocation policies and software license data and running a workload manager, said workload manager being configured to

while said first workload is executing in said first partition using a first amount of hardware resources, assign a second amount of hardware resources to said first partition, said second amount exceeding a licensed amount of said hardware resources on which said first workload is licensed to run under a software license associated with said first workload,

increase said licensed amount to at or above said second amount using an inter-server transfer of software license rights from said second workload to said first workload, and

allocating said second amount of said hardware resources to said first partition at least in part by using an intra-server transfer of said hardware resources from said second partition to said first partition.

6. A computer system as recited in claim 5 further comprising a licensing agent for automatically modifying software licenses prior to said inter-server transfer of software license rights.

7. A computer system as recited in claim 5 further including a log of configuration changes involving transfers of software license rights.

8. A computer product comprising non-transitory media encoded with code configured to, when executed by a processor:

while a target workload is running in a target partition of a target server using a first amount of hardware resources, assign a second amount of hardware resources to said target partition in excess of a licensed amount of said hardware resources on which said first workload is licensed to run under a software license associated with said first workload, said target workload including an operating system or an application;

increase said licensed amount to at or above said second amount at least in part by using an inter-server transfer of software license rights from a source workload running on a source server to said target workload; and

allocate said second amount of said hardware resources to said target partition at least in part by using an intra-server transfer of said hardware resources from a source partition of said target server to said target partition.

9. A computer product as recited in claim 8 further comprising said processor.