Abstract: Various systems and methods for exchanging communications between devices coupled by an address translation device are disclosed. These techniques can be used to facilitate automatic relationship discovery. One method involves extracting a sequence number from a TCP acknowledgment message being conveyed from a network interface to a TCP stack, and then sending a new TCP message, which includes the sequence number.

Abstract: A method, system, computer system, and computer-readable medium that enable quick recovery from failure of one or more nodes, applications, and/or communication links in a distributed computing environment, such as a cluster. Recovery is facilitated by regularly saving persistent images of the in-memory checkpoint data and/or of distributed shared memory segments. The persistent checkpoint images are written asynchronously so that applications can continue to write data even during creation and/or updating the persistent image and with minimal effect on application performance. Furthermore, multiple updater nodes can simultaneously update the persistent checkpoint image using normal synchronization operations. When one or more nodes fail, the persistent checkpoint image can be read and used to restart the application in the most recently-saved state prior to the failure.

Abstract: A mechanism to collate, interpret, target or view communication items retained by an organization is presented. Such a mechanism can be used as an aid in identifying communication items (e.g., documents) during electronic discovery, as well as discovery of communication chains. Embodiments of the present invention provide a method, system, apparatus and computer program product for storing communication data, generating a people map data structure using the communication data, generating an evidence map data structure using the communication data, and coupling the people map data structure and evidence map data structure.

Abstract: Various methods and systems for ending a communication protocol connection in response to detecting the failure of a cluster node are disclosed. One method involves detecting a failed node within a cluster. The failed node communicates with a client via a communication protocol connection. In response to detecting the failed node, a communication protocol message is sent to the client. Receipt of the communication protocol message causes the client to terminate the communication protocol connection.

Abstract: Various methods and systems for maintaining a communication protocol connection during a failover are disclosed. One method involves obtaining a first value of a parameter associated with a communication protocol connection between a primary node and a client and sending a flow control message to the client, in response to detecting that the primary node is failed. The flow control message includes the parameter.

Abstract: An apparatus or method for preserving the relationships or dependencies between content of files in a file system or between content of files in separate file systems. The preservation of relationships or dependencies may require the preservation of the files and their content as well. In one embodiment, the method includes receiving a first instruction that, when implemented, performs an operation involving a first file in a file system, wherein the first file is related to the second file. In response to receiving the first instruction, a second instruction is selected that, when implemented, performs a second operation involving the first file or a second file, wherein the second instruction is implemented before or after implementing the first instruction.