Schlumberger Industries, Sa

Scality, S.a.

Bradley King

Jean-Luc Guizot

Alain Zarudiansky

Viet Tuan Nguyen

Boris Faure

Stéphane Cance

Bjorn Schuberg

Olivier Detour

A method is described. The method includes receiving logs from multiple connector nodes, each of the logs having entries that describe changes made to a file system at its respective one of the connector nodes. The method includes constructing a directed acyclic graph (DAG) from the logs' respective entries, the DAG comprising nodes connected by flows, the nodes describing actions made to directories and files of the file system, wherein, a flow of the flows connects a subset of the nodes that describe actions made to a particular directory or file of the file system. The method includes removing one or more irrelevant nodes from the DAG. The method includes applying actions described by remaining nodes of the DAG to an object storage system having respective objects for directories and files of the file system.

Method and apparatus for implementing changes to a file system that is emulated with an object storage system

An aerodynamic enclosure is placed in the flow, the enclosure including an opening enabling the enclosure to be filled with the flowing fluid, and having a thermal pulse generator mounted flush with its wall, which generator is suitable for emitting modulated thermal pulses simultaneously to the outside and to the inside of the enclosure. A first thermal sensor is located in the flow and a second thermal sensor is located in the enclosure. The sensors measure propagation times or phase shifts of the thermal waves respectively in the flow and in the non-flowing fluid, thereby making it possible to deduce the value of the fluid flow rate while compensating for any variations in the temperature, pressure, and composition of the fluid. The invention is applicable to gas metering.

Volume flow meter that measures transit time

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Malakoff, France

Bradley King