International Business Machines Corporation

Venkateswara Reddy Madduri

Manish Satyapal Gupta

Pradipta De

Nikhil Jain

Manoj Soni

Vishal Anand

Shivkumar Kalanaraman

Jai Kumar Singh

Kuntal Dey

Mudhakar Srivatsa

Ravi Kothari

Manoj Kumar Agarwal

Sriram Raghavan

Dipyaman Banerjee

Narendran Sachindran

Methods and arrangements for evaluating a regular expression. Text strings are received. A regular expression is also received, the regular expression comprising a pattern for specifying and recognizing at least one text string from among the received text strings. There is generated, with respect to the received text strings, a data structure containing grams with positional information. The data structure is employed to evaluate the regular expression via identifying a subset of the text strings comprising at least one match for the given regular expression. Other variants and embodiments are broadly contemplated herein.

Accelerated regular expression evaluation using positional information

Provided is a system for the distribution of data, comprising a data server comprising a processor, a computer-readable storage medium coupled to the data server, a plurality of proxy servers, each with a plurality of network interfaces, a file of digital content, comprising a plurality of chunks, wherein copies of each chunk are stored on two or more of the proxy servers and the digital server; and logic, stored on the computer-readable storage medium and executed on the processor, for receiving a request for the digital file from a client device, for generating a proxy list for each chunk, comprising information identifying the two or more proxy servers on which the copies of the chunks are stored, and information corresponding to network interfaces associated with the two or more proxy servers on which the copies are stored; and for transmitting the proxy list to the client device to enable the client device to select two or more proxy servers on which the copies are stored and simultaneously download the two or more of the chunks utilizing two or more proxy servers and two or more network interfaces.

Content delivery using multiple sources over heterogeneous interfaces

Methods and arrangements for facilitating virtual appliance image delivery. Virtual appliance image templates are stored at a caching location, based on a historical request pattern. A request is received for a virtual appliance image and there is provided, to a second location, a virtual appliance image responsive to the received request. A difference is determined between the requested virtual appliance image and stored virtual appliance image templates.

Computing reusable image components to minimize network bandwidth usage

Methods and arrangements for tracking changes in an information technology environment. Configuration dependencies are learned in a production environment, and a model of the production environment is built. Events on a target system in the production environment are subscribed to. Events are received and correlated with the model to generate an enhanced model, and the enhanced model is thereupon employed to predict configuration errors.

Arrangements for extending configuration management in large IT environments to track changes proactively

A set of data is obtained, representing a graph of a computer network having a set of hardware nodes and a set of hardware links between the hardware nodes. The hardware links are represented as edges in the graph. A first subset (for example, a vertex cut set) of the set of hardware nodes is found, such that those of the hardware nodes in the first subset are able to withstand a maximum number of failures before the graph disconnects. The failures include node failures and/or edge failures. The hardware nodes in the first subset are ranked based on expected resiliency, to obtain a ranked list. Optionally, in case of a tie between two or more of the hardware nodes in the ranked list, the tie is broken using a sum of shortest path metric.

Increasing resilience of a network service

A method, system, and computer readable storage device (that stores the method) extract connectivity information from multiple telecommunication services, provided by a single multiple service provider. The method, system, and device merge the separate connectivity information from each service in a unified graph of telephone service users and digital service users (including common users of both services). The method, system, and device assigne trust values based on the connectivity information and shared data content between users. The method, system, and device may also issue a proxy certificate of authority (CA), by a trusted CA residing within the digital service, to provide digital service to a user of the telephone service in the unified graph, when the trusted CA is a nearest trusted CA in the unified graph.

Trusted content access management using multiple social graphs across heterogeneous networks

Techniques for automatically documenting activity data in connection with execution of a ticket are provided. The techniques include receiving activity data in connection with execution of a ticket, processing the activity data to generate an output, and appending the processed activity data output to the ticket for ticket enrichment. Techniques for identifying a wrong choice of resolution code in connection with a ticket are also provided. The techniques include analyzing one or more previous tickets to determine a category in which a ticket belongs, determining whether a user-defined code is in variance with a system-suggested code, and sending an alert to a system administrator if the user-defined code is different than the system-suggested code.

Automatic documentation of ticket execution

A system and method of employing a facade to intercept change action commands to be carried out on a target IT endpoint resource. The intercepted commands are compared to information on a corresponding change ticket and any differences, along with the information such as target history, are used to compute a risk assessment of the risk in allowing the intercepted change action commands to be executed. Where the risk exceeds a predetermined threshold, the intercepted change action commands may be modified or eventually aborted.

Facade for business risk minimization in change administration via risk estimation and mistake identification by ticket analysis

An indication of a problem in at least one component of a computing system is obtained. A relevant change set associated with a directed dependency graph is analyzed. The computing system is configured to proactively overcome a root cause of the problem. The relevant change set includes a list of past changes to the computing system which are potentially relevant to the problem. The directed dependency graph includes dependency information regarding given components of the computing system invoked by transactions in the computing system. The analyzing includes identifying at least one of the past changes to the computing system that is the root cause of the problem.

Growing community of inventors

New Delhi, India

Venkateswara Reddy Madduri