Bull Sas

Sébastien Dugue

Jean-Vincent Ficet

Yann Kalemkarian

Marek Schimara

Jean-Olivier Gerphagnon

Nicolas Morey-Chaisemartin

Philippe Couvee

Benoit Welterlen

Christophe Laferriere

The invention relates to a method for generating a request, from a formal language instruction defining a set of ports of an interconnection network, said request including an addressing command for each one of the ports defined in the instruction, said method including the following steps:

Method for generating requests for the segmentation of the monitoring of an interconnection network and associated hardware

The invention relates to a method of fault management in a network of nodes (), comprising, for each node considered () of all or part of the nodes () of the network performing one and the same calculation: firstly, a step of local backup of the state of this node considered (), at the level of a storage medium () for this node considered (), the link () between this storage medium () and this node considered () being able to be redirected from this storage medium () to another node (), thereafter, a step of relaunching: either of the node considered () if the latter is not defective, on the basis of the local backup of the state of this node considered (), or of an operational node () different from the node considered (), if the node considered () is defective, on the basis of the recovery of the local backup of the state of this node considered (), by redirecting said link () between the node considered () and its storage medium () so as to connect said storage medium () to said operational node (), the local backups of these nodes considered (), used for the relaunching steps, are mutually consistent so as to correspond to one and the same state of this calculation.

Method of fault management in a network of nodes and associated part of network of nodes

The invention relates to a device for acquiring values of counters associated with a computational task implemented on an interconnection network, said interconnection network including a plurality of nodes interconnected via switches, said nodes and switches including a plurality of ports associated with counters, the values of said counters being stored over time, said computational task involving a subset of ports associated with subsets of nodes and switches, and said device comprising:

Device and method for acquiring values of counters associated with a computational task

A method of remote monitoring and remote control of a cluster including nodes connected to a communication network of a first type, a relay node of the nodes including first and second network interfaces in accordance with first and second types of communication network respectively, the first and second types being distinct, some steps of the monitoring and control method being implemented in a remote computer linked to the relay node by a communication network of the second type, the method including receiving a packet via the first network interface; encapsulating the received data packet in a data frame in accordance with a protocol of the communication network of the second type; sending the data frame to the remote computer via the second network interface, the receiving of the data packet, the encapsulating of the data packet and the sending of the data frame being implemented in the relay node.

Method of remote monitoring and remote control of a cluster using a communication network of infiniband type and computer program implementing this method

The method relates to the monitoring of at least one routing parameter for a cluster including nodes and switches, static communication links connecting nodes and switches. Each switch includes several output ports. After having selected at least one switch, a number of routes per port is calculated for each port of each switch selected, routes being defined during a routing step for each connecting one node to another. A mean number of routes per port is then calculated for the at least one selected switch. Each number of routes per port calculated is then compared with the mean number of routes per port calculated and, in response to this comparison, a potential imbalance of routing of the cluster is notified.

Method of monitoring and warning for configuring routing in a cluster comprising static communication links and computer program implementing that method

A system comprising a peripheral having a timing mechanism and a node, one of which comprises a real memory space and the other a corresponding virtual memory space, is disclosed. On receiving a timing command in the real memory space, comprising references to an event and time, an entry comprising data relative to the event and time references is created in a monitoring queue of the peripheral. A current point in time is then compared, in the peripheral, to a scheduled point in time linked to an item of data relative to a time reference stored in the monitoring queue. In response, if the current point in time is after the scheduled point in time, an item of data relative to a reference linked to the item of data relative to a time reference stored in the monitoring queue is stored in the real memory space.

Remotely located timing method and device for a processing unit in an information processing system

The invention relates in particular to the optimization of routing in a cluster comprising a plurality of nodes and static communication links connecting nodes of the plurality of nodes, said routing being based on load levels associated with the communication links. In order to establish a connection between at least two nodes of the cluster that have been identified (), at least one route is determined () that connects the identified nodes according to the communication links, said route being determined according to the nodes identified, communication links and at least one load level associated with each communication link. A determined route is selected. Subsequently, a value of weight associated with the selected route is estimated () and a load level associated with each communication link of the selected route is incremented ().

Method of optimizing routing in a cluster comprising static communication links and computer program implementing that method

The invention relates to the pseudo-dynamic routing in a cluster comprising nodes, of the static communication links connecting these nodes. The routing is based on load levels associated with the links. After having received () a list of node identifiers, these identifiers designating a set of nodes allotted to the execution of a task, a weight having a first predetermined value is assigned () to a pair formed of an identifier of a first and of a second node of said set of nodes, the first and second nodes being distinct, a weight having a second predetermined value, distinct from the first value, being assigned by default to the formed pairs of identifiers of nodes allotted to different tasks. The cluster is then routed, the routing comprising the selecting () of a route between the first and second nodes and the incrementing () of a load level associated with each link comprising the selected route of the first value.

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Saint Theoffrey, France

Sébastien Dugue