Server system

A method of operating a server system that comprises a plurality of processing devices arranged to serve one or more services to one or more client systems via an external network, a plurality of storage devices for use by the processing devices to store data relating to said services, and a storage fabric connecting the processing devices to the storage devices;

• the method comprising:
• arranging the storage fabric, processing devices and storage devices to operate according to a storage fabric protocol in order to communicate between the processing devices and the storage devices over the storage fabric, wherein the storage fabric is settable with a mapping determining which of the processing devices are allocated to use which of the storage devices in providing said services to the client systems;
• and
• dynamically adapting the mapping in response to either:
• (i) failure or other downtime of one of the processing devices, storage devices, a component of the storage fabric or a connection in the storage fabric;
• or (ii) a current demand for said services from the client systems.

A program for operating a server system that comprises a plurality of processing devices arranged to serve one or more services to one or more client systems via an external network, a plurality of storage devices for use by the processing devices to store data relating to said services, and a storage fabric connecting the processing devices to the storage devices;

• the program comprising code embodied on computer-readable storage and configured so as when run on one or more of the servers or a management computer to perform operations of:
• operating the storage fabric, processing devices and storage devices to operate according to a storage fabric protocol in order to communicate between the processing devices and the storage devices over the storage fabric, wherein the storage fabric is settable with a mapping determining which of the processing devices are allocated to use which of the storage devices in providing said services to the client systems;
• and
• dynamically adapting the mapping in response to either:
• (i) failure or other downtime of one of the processing devices, storage devices, a component of the storage fabric or a connection in the storage fabric;
• or (ii) a current demand for said services from the client systems.