Portable maintenance cdu and maintenance ports for supplying liquid coolant during primary cdu downtime

A method comprising:

• moving a portable maintenance CDU into an installation position adjacent to a computing system, wherein a primary CDU is fluidically coupled to the computing system via a first set of fluid couplings;
• connecting the maintenance CDU to the computing system via a second set of fluid couplings, in a state of the primary CDU coupled to the computing system;
• and
• supplying liquid coolant to the computing system via the maintenance CDU.

A system comprising:

• a computing system comprising a group of compute nodes configured to receive liquid coolant;
• a primary coolant distribution unit (CDU) fluidically coupled to the computing system via a first set of fluid couplings and configured to supply the liquid coolant to the computing system;
• and
• a second set of fluid couplings configured to be removably coupled with a portable maintenance CDU, in a state of the primary CDU still being coupled to the computing system.