Evacuation of memory from a drawer in a live multi-node system

A system comprising:

• a processor communicatively coupled to a memory, the processor configured to:
• place a first drawer into an evacuation mode, the evacuation mode comprising a cessation of non-evacuation operations and providing for a transfer of data stored by memory of the first drawer to a destination drawer using dynamic memory reallocation (DMR), wherein the first drawer comprises:
• a local pool of fetch/store controllers configured to interact with a group of remote fetch/store controllers of the destination drawer;
• a first group of remote fetch/store controllers configured to interact with a local pool of fetch/store controllers of the destination drawer;
• and
• a second group of remote fetch/store controllers configured to interact with a local pool of fetch/store controllers of a second drawer;
• transmit, by the first drawer to the destination drawer, a store request, wherein the store request represents a request to transfer the data stored by the memory of the first drawer to the destination drawer for storage by the destination drawer;
• and
• transmit, by the first drawer using the local pool of fetch/store controllers, the data stored by the memory of the first drawer to the destination drawer.

A computer program product comprising a computer readable storage medium having program instructions embodied therewith the program instructions executable by a computer processor to cause the computer processor to perform a method comprising:

• placing a first drawer into an evacuation mode, the evacuation mode comprising a cessation of non-evacuation operations and providing for a transfer of data stored by memory of the first drawer to a destination drawer using dynamic memory reallocation (DMR), wherein the first drawer comprises:
• a local pool of fetch/store controllers configured to interact with a group of remote fetch/store controllers of the destination drawer;
• a first group of remote fetch/store controllers configured to interact with a local pool of fetch/store controllers of the destination drawer;
• and
• a second group of remote fetch/store controllers configured to interact with a local pool of fetch/store controllers of a second drawer;
• transmitting, by the first drawer to the destination drawer, a store request, wherein the store request represents a request to transfer the data stored by the memory of the first drawer to the destination drawer for storage by the destination drawer;
• and
• transmitting, by the first drawer using the local pool of fetch/store controllers, the data stored by the memory of the first drawer to the destination drawer.