Netapp, Inc.

Network Appliance, Inc.

Hewlett-Packard Development Company, L.p.

Compaq Computer Corporation, Inc.

Tandem Computers Incorporated

Jeffrey Dale Merrick

Jason Ansel Lango

Konstantinos Roussos

William McGovern

J Christopher Wagner

Robert Tsai

Sudesh Saoji

Siddhesh Jere

Cheng-Yu Huang

James R Smullen

Randall K Shingai

A file system in a storage system allows a user to designate data as write-once read-many (WORM) data. The WORM data are stored in a first set of storage media of the storage system. Signature data are generated from the WORM data. Using the signature data, the integrity of the WORM data can be verified.

Method and apparatus for verifiably migrating WORM data

A system is provided to commit data to persistent storage. The system comprises a configuration component to set an autocommit period, a scanner to detect that the autocommit period has expired for a file and a commit component to commit the file to write once read many (WORM) status In one embodiment, when an autocommit period is set, the system may be configured to automatically commit a file to WORM status if the file has not been changed for the autocommit period.

Method and apparatus to automatically commit files to WORM status

Techniques for caching media data, including streaming media data, using content-sensitive identifiers. The content-sensitive identifiers enable a caching proxy or a caching server to unambiguously determine the version or contents of media data cached by the caching proxy for a particular data pointer or data reference (e.g., a URL) such that an appropriate version of the media data can be served to a requesting client system in an efficient and economical manner.

Caching media data using content sensitive object identifiers

Caching media data using content-sensitive identifiers

An operating system is simulated to run in conjunction with a native operating system, allowing processes originally developed for the operating system being simulated to be ported to the environment of the native operating system with a minimum of effort. Ported processes will consume resources of both operating systems, the native operating system and the simulated operating system, that are cleaned or otherwise removed when the ported process ends by setting up a monitoring facility to detect when the ported process ends. When that occurs, the simulated operating system resources are cleaned by a cleanup process that impersonates the ported process that ended. The cleanup process is also monitored, so that when it ends, additional cleanup processes are called into action to cleanup the system resources of the remaining simulated operating system used by the ported process that ended, and the system resources used by the cleanup process.

Method of cleanup after termination of a process under a simulated operating system

An operating system is simulated to run in conjunction with a native operating system, allowing processes, particularly multi-threaded processes, originally developed for the simulated operating system to be ported to the environment of the native operating system with a minimum of effort. In their natural environment the processes being ported have the capability of requesting that other processes be terminated. This capability is provided in the simulated system and in a multi-threaded environment of the simulated system. Processes executing in the simulated system, even if multi-threaded, also have the capability of protecting against being stopped when executing critical code.

Method of terminating temporarily unstoppable code executing in a multi-threaded simulated operating system

An operating system is simulated to run in conjunction with a native operating system, allowing processes originally developed for the operating system being simulated to be ported to the environment of the native operating system with a minimum of effort. In the event a ported process attempts to communicate with a terminated process before the simulated operating system is notified of the termination, the attempt at communication will return an error. In response, a series of checks are performed to determine if the error was the result of termination of the process with which communication was attempted, or a more serious error that should be reported to the native operating system for action to protect the integrity of data.

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Mountain View, CA, United States of America

Jeffrey Dale Merrick