Abstract: A computer-based system includes plural computer-based facilities termed nodes interconnected in a network, including storing nodes that include a direct-access local memory unit, and a storage server for managing access to this unit based on a queue, application nodes, each including: an application environment with a representation of files that are accessible in a form of addresses of blocks designating a physical address on a local memory unit, and a storage client capable of interacting with a storage server, based on an access request designating a block address. The storage server includes a scheduler capable of executing the access requests contained in its queue in a determined order. The order is determined as a function of a set of rules forming performance criteria, and involving one or more state parameters of the queue and/or of the storing node on which it resides.

Abstract: Method for distributing objects in a heterogeneous group of data storage devices includes breaking down each object into a plurality of blocks, distributing the blocks in different storage devices in accordance with a distribution law which consists in distributing in each of the storage devices pieces of objects consisting each of one or of a plurality of blocks. The parameter used for managing the distribution of the pieces of objects is a flexibility coefficient CF(i), representing the difference between the weights of the pieces of the object (i). Values representing the variability in the popularity of each object are periodically measured and calculated; for each object, a desired flexibility coefficient CFv(i) to be assigned to the object is calculated from said values measured or calculated at instant (t), in accordance with a principle.

Abstract: The invention relates to a method for distributing objects in a heterogeneous group of data storage devices which consists in breaking down each object into a plurality of blocks, distributing said blocks in different storage devices in accordance with a distribution law which consists in distributing in each of said storage devices pieces of objects consisting each of one or of a plurality of blocks.