Telcordia Technologies, Inc.

Caringo, Inc.

Donald George Baker

Andrew David Klager

Marian H Nodine

Patrick Murphy Ray

Thomas William Cook

Tom Teugels

Segments of a local range can appear multiple times in the sequence of erasure sets in a manifest without the data being duplicated. A subset of the content of an erasure set can be included in the logical object. It is not required that all erasure sets in an object use the same encoding. A manifest can indicate one or more portions of the logical object for which no data has been provided, and for which a 'fill' pattern is specified. A portion of data can be inserted at any point inside the object by inserting a reference to one or more segment sets containing that data into the manifest. If the desired insertion point is within an existing segment set, then that manifest set can be 'split' by incorporating two references to it, with the first specifying the range of data before the insertion point, and the second specifying the range of data after the insertion point. Many operations are thus enabled on an erasure-coded object in Object Storage such as 'append', &#x201c;insert,&#x201d; &#x201c;overwrite&#x201d; and &#x201c;merge.&#x201d;

Multi-part upload and editing of erasure-coded objects

A system and method for network fault diagnosis in a network having network elements is presented. The method comprises creating a network causality model, generating Boolean expressions from the network causality model, converting the Boolean expressions into SAT sets, receiving network monitoring results, correlating these monitoring results with the SAT sets, and enumerating all possible diagnostic explanations of potential faults, properly annotated. Creating a network causality model can comprise creating, for each network element, an element-specific causality model, stitching together all network elements using the element-specific causality models and a network topology, retrieving monitoring state and propagation information, and generating the network causality model using the stitched together network elements and the monitoring state and propagation information. Stitching together network elements can comprise adding causes and implies dependency between appropriate network elements and/or adding and connecting reachable and not-reachable states. The network causality model can comprise network element states.

Computing diagnostic explanations of network faults from monitoring data

Growing community of inventors

Austin, TX, United States of America

Donald George Baker