Data migration based on performance characteristics of memory blocks

1. A method, performed by a performance manager, for managing the performance of a logical server of a data center, the data center comprising at least one memory pool in which a memory block has been allocated to the logical server, the method comprising the performance manager:

determining performance characteristics associated with a first portion of the memory block comprised in a first memory unit of the at least one memory pool, wherein the performance characteristics associated with the first portion of the memory block are determined based on a plurality of weighted parameters, each of which is calculated according to a corresponding weighting factor;

identifying a second portion of the memory block, comprised in a second memory unit of the at least one memory pool, to which data of the first portion of the memory block may be migrated, to apply performance characteristics associated with the second portion of the memory block to the data;

initiating migration of the data to the second portion of the memory block; and

monitoring the memory block, wherein the monitoring the memory block comprises:

determining a first memory grade for the first memory unit based on at least characteristics associated with the first memory unit, wherein the first memory grade indicates a current performance of the first memory unit after migration and is determined as a function of:

a weighted memory type of the first memory unit;

a weighted latency of the first memory unit; and

a weighted occupancy percentage of the first memory unit; and

determining a second memory grade for the second memory unit based on at least characteristics associated with the second memory unit, wherein the second memory grade indicates a current performance of the second memory unit after migration and is determined as a function of:

a weighted memory type of the second memory unit;

a weighted latency of the second memory unit; and

a weighted occupancy percentage of the second memory unit.

2. The method of claim 1 , further comprising the performance manager updating at least one Memory Management Unit (MMU), associated with at least one CPU pool comprised in the data center, about the initiation of the migration of the data to the second portion of the memory block.

3. The method of claim 1 , wherein the initiating migration of the data to the second portion of the memory block comprises instructing a Memory Management Controller to execute the migration.

4. The method of claim 1 , wherein the performance characteristics associated with the first portion and the second portion of the memory block are defined by:

access rates of the first and second memory units respectively;

the occupancy percentage of the first and second memory units respectively;

physical distances between the first and second memory units and a CPU resource of the CPU pool comprised in the logical server;

and/or

connection link and traffic conditions between the first and second memory units, respectively, and CPUs comprised in the logical server.

5. A performance manager for managing the performance of a logical server of a data center, the data center comprising at least one memory pool in which a memory block has been allocated to the logical server, the performance manager comprising:

processing circuitry;

memory containing instructions executable by the processing circuitry whereby the performance manager is operative to:

determine performance characteristics associated with a first portion of a memory block comprised in a first memory unit of the at least one memory pool, wherein the performance characteristics associated with the first portion of the memory block are determined based on a plurality of weighted parameters, each of which is calculated according to a corresponding weighting factor;

identify a second portion of the memory block, comprised in a second memory unit of the at least one memory pool, to which data of the first portion of the memory block may be migrated, to apply performance characteristics associated with the second portion of the memory block to the data;

initiate migration of the data to the second portion of the memory block; and

monitor the memory block, wherein the instructions are such that the performance manager is operative to monitor the memory bock by:

determining a first memory grade for the first memory unit based on at least characteristics associated with the first memory unit, wherein the first memory grade indicates a current performance of the first memory unit after migration and is determined as a function of:

a weighted memory type of the first memory unit;

a weighted latency of the first memory unit; and

a weighted occupancy percentage of the first memory unit; and

determining a second memory grade for the second memory unit based on at least characteristics associated with the second memory unit, wherein the second memory grade indicates a current performance of the second memory unit after migration and is determined as a function of:

a weighted memory type of the second memory unit;

a weighted latency of the second memory unit; and

a weighted occupancy percentage of the second memory unit.

6. The performance manager of claim 5 , wherein the instructions are such that the performance manager is operative to update at least one Memory Management Unit (MMU), associated with at least one CPU pool comprised in the data center, about the initiation of the migration of the data to the second portion of the memory block.

7. The performance manager of claim 5 , wherein the instructions are such that the performance manager is operative to initiate the migration of the data to the second portion of the memory block by instructing at least a Memory Management Controller to execute the migration.

8. The performance manager of claim 5 , the performance characteristics associated with the first portion and the second portion of the memory block are defined by:

access rates of the first and second memory units respectively;

the occupancy percentage of the first and second memory units respectively;

physical distances between the first and second memory units and a CPU resource of the CPU pool comprised in the logical server;

and/or

connection link and traffic conditions between the first and second memory units, respectively, and CPUs comprised in the logical server.

9. A non-transitory computer readable recording medium storing a computer program product for controlling a performance manager for managing the performance of a logical server of a data center, the data center comprising at least one memory pool in which a memory block has been allocated to the logical server, the computer program product comprising software instructions which, when run on processing circuitry of the performance manager, causes the performance manager to:

determine performance characteristics associated with a first portion of the memory block comprised in a first memory unit of the at least one memory pool, wherein the performance characteristics associated with the first portion of the memory block are determined based on a plurality of weighted parameters, each of which is calculated according to a corresponding weighting factor;

identify a second portion of the memory block, comprised in a second memory unit of the at least one memory pool, to which data of the first portion of the memory block may be migrated, to apply performance characteristics associated with the second portion of the memory block to the data;

initiate migration of the data to the second portion of the memory block; and

monitor the memory block by:

determining a first memory grade for the first memory unit based on at least characteristics associated with the first memory unit, wherein the first memory grade indicates a current performance of the first memory unit after migration and is determined as a function of:

a weighted memory type of the first memory unit;

a weighted latency of the first memory unit; and

a weighted occupancy percentage of the first memory unit; and

determining a second memory grade for the second memory unit based on at least characteristics associated with the second memory unit, wherein the second memory grade indicates a current performance of the second memory unit after migration and is determined as a function of:

a weighted memory type of the second memory unit;

a weighted latency of the second memory unit; and

a weighted occupancy percentage of the second memory unit.