Abstract: A method of testing a target in a network by fault injection, includes: defining a transaction baseline; modifying at least one of an order and a structure of the transaction baseline to obtain a modified transaction with malformed grammar; and transmitting the modified transaction to a target. The method may further include, receiving a feedback from the target to determine fault occurrence. An apparatus for testing a target in a network by fault injection, includes: a driver configured to generate patterns, where a pattern can generate a plurality of packets for transmission to the target, the pattern being represented by an expression with a literal string and a wild character class; and a network interface coupled to the driver and configured to transmit and receive network traffic.

Abstract: In one embodiment, the invention provides a method of transforming a request from a client to a proxy cache, the method comprising: receiving a request from a client, where the request is based upon a first open standard protocol; and translating the request from the first open standard protocol into a second open standard protocol at a file system level; and transmitting the request in the second open standard protocol to a server.

Abstract: In one embodiment, a method of processing data in a network with multiple proxy caches, includes: pushing cached data in a first proxy cache to at least one other proxy cache in a cluster configuration; caching the data from the first proxy cache; and permitting a client to access the data in the at least one other proxy cache in the cluster configuration. In another embodiment, a method of processing data in a network with multiple proxy caches, includes: providing a snapshot replica from a first server to second server; and permitting a proxy cache to access the second server for data in the snapshot replica, in response to a disconnect operation of the first server.

Abstract: A method of testing a target in a network by fault injection, includes: defining a transaction baseline; modifying at least one of an order and a structure of the transaction baseline to obtain a modified transaction with malformed grammar; and transmitting the modified transaction to a target. The method may further include, receiving a feedback from the target to determine fault occurrence. An apparatus for testing a target in a network by fault injection, includes: a driver configured to generate patterns, where a pattern can generate a plurality of packets for transmission to the target, the pattern being represented by an expression with a literal string and a wild character class; and a network interface coupled to the driver and configured to transmit and receive network traffic.

Abstract: In one embodiment, the invention provides an apparatus for caching data in a network, with the apparatus including a proxy cache configured to receive request for an object from a client and to fetch data blocks from a server. The proxy cache may be configured to cache the data blocks in a hierarchical relationship within the object. The object may be, for example, a data file or a directory. The data blocks that are cached in the proxy cache define an active data set which is based upon a request from a client.

Abstract: In one embodiment, a first storage device and a second storage device form a mirror. When the first storage device loses synchronization with the second storage device, data present in the second storage device but not in the first storage device are identified. The identified data are then copied to the first storage device. In one embodiment, a method of rebuilding data in a storage device includes the act of replacing a failed storage device with a replacement storage device. Up-to-date data for the failed storage device, which may be stored in a corresponding mirror, may then be copied to the replacement storage device. Thereafter, the replacement storage device and any other storage devices that have lost synchronization with their mirror are resynchronized.

Abstract: A method of determining a configuration of a collection of storage units, includes: generating a configuration, identifying for a specific configuration by use of a configuration identifier; and assigning the specific configuration to the first labels of all storage units and then to the second labels of all storage units, and utilizing the configuration identifier to determine the most recent configuration successfully written to all disks in the configuration.

Abstract: A method of real time monitoring and control of networked computers, includes: providing a monitoring computer unit and client computer unit both capable of being communicatively coupled to a network system; and detecting states in the client computer and transmitting the detected states to the monitoring computer unit via the network system.