Abstract: A method controls the change in operating system in selected service nodes of a high-performance computer (CHP). The method includes: a step (i) of defining, for the selected service nodes, a reduced version of a new operating system to be installed, a boot kernel, a so-called “reference” tree node software image suitable for the new operating system and including a definition of an instantiation to be established in the service nodes, and an activation module capable of locally installing the reference image in each service node; a step (ii) wherein the defined reference image, boot kernel, activation module, and reduced operating system version are transferred into the service nodes; and a step (iii) wherein the transferred activation module is used in each service node in order to locally install the transferred reference image.

Abstract: A method for monitoring the supply of authentication certificates to service nodes of a high-performance computer, includes a first step of defining for each service node an assembly of at least one authentication certificate, and then integrating each assembly defined for a service node into a configuration file associated with an identifier of the service node; a second step in which each service node transmits to a predefined server a start-up request intended for recovering the identifier thereof and a control file containing the assembly included in the associated configuration file; and a third step in which each service node extracts from the recovered control file the assembly contained therein in order to store each authentication certificate contained therein in an associated location in a corresponding storage area.

Abstract: A method controls the change in operating system in selected service nodes of a high- performance computer (CHP). The method includes: a step (i) of defining, for the selected service nodes, a reduced version of a new operating system to be installed, a boot kernel, a so-called “reference” tree node software image suitable for the new operating system and including a definition of an instantiation to be established in the service nodes, and an activation module capable of locally installing the reference image in each service node; a step (ii) wherein the defined reference image, boot kernel, activation module, and reduced operating system version are transferred into the service nodes; and a step (iii) wherein the transferred activation module is used in each service node in order to locally install the transferred reference image.

Abstract: A host structure (P) is provided for terminal adaptors (AD-AD.sub.14, SDI) of a distributed information processing architecture (ARCH) having information processing systems (SI, SI.sub.1, SI.sub.j, . . . , SIS.sub.j, SAD, . . . SAD.sub.j) which communicate by way of a network (RE). The host structure (P) includes a first compartment (CAV) containing a plurality of cartridges (1, AD-AD.sub.14, ADI) each containing a board carrying the electronic circuit of an adaptor, a second compartment (CAR) containing the electrical supply to the boards contained in the first compartment and a ventilation device (VAT) of the structure. The first and second compartments are separated by a backpanel (FP) carrying a copper bus (BCE, BCE.sub.j) specific to the network to which the boards carrying the terminal adaptors are connected. The backpanel (FP) includes a CORE (CF-CF.sub.14) for connecting the boards to the network (RE) and to the bus (BCE), on the one hand, and to the power supply (AIM), on the other.