Abstract: A system and method establishes bidirectional contact through firewall devices. A method includes establishing a first connection between a first device and a second device and storing a connection record on the second device. When the second device receives a request to connect with the first device, it identifies and searches for the connection record corresponding to the first device. When the second device finds the connection, the second device sends a request to establish a second connection from the second device to the first device. Upon receiving the request to establish a second connection, the first device verifies the request to establish the second connection and the lifetime of the first connection. Upon verification, the first device establishes the second connection between the first computing device and the second device.

Abstract: Systems and methods for replicating input-output (I/O) events of a cluster shared volume (CSV) are presented. Such systems may include a cluster device or node (in a cluster of devices), a coordinator node, and a replica server. Replication techniques disclosed herein may include capturing, using a processor operatively associated with a cluster device, a direct I/O event generated at the cluster device (e.g., by a virtual machine). A legacy file system filter driver of the cluster device may be used and enabled to perform the capturing of the direct I/O event. The legacy file system filter driver may be different than a CSV filter driver associated with the CSV, and may be enabled after the CSV filter driver is enabled. The captured direct I/O event may then be transmitted to the replica server using, e.g., a replication filter, to maintain a backup copy of the event at the replica server.

Abstract: A method includes receiving a connection request at a connection server port via a network from a client, the connection request directed to an application server, duplicating a socket for the communication and passing the socket to the application server, and replying to the network client connection request to establish a direct connection between the client and the application server via the passed socket, and this method support SSL protocol via passed socket.

Abstract: Systems and methods for replicating data from a master server to a replica or backup server include capturing a read event associated with a retrieved file at the master server. The retrieved file may be generated by updating a reference file with remotely stored data. Attributes associated with the retrieved file may be checked to determine if they include attributes associated with the reference file, and if they do not, at least a portion of data and one or more attributes of the retrieved file may be copied or replicated to the replica server. The captured read event may be generated when an application attempts to access or read the retrieved file. An event associated with generation of the reference file may also be captured at the master server, and copies to the replica server.

Abstract: A method includes running a backup image of a device on the device while the device is being restored such that the device being restored is capable of servicing users while it is being restored. The method further includes determining if the data requested by an operating system image being executed is available from local storage of the device being restored, and causing the requested data to be stored in the local storage of the device being restored from a backup storage if the storage of the device being restored does not yet have the requested data.

Abstract: Systems and methods for replicating input-output (I/O) events of a cluster shared volume (CSV) are presented. Such systems may include a cluster device or node (in a cluster of devices), a coordinator node, and a replica server. Replication techniques disclosed herein may include capturing, using a processor operatively associated with a cluster device, a direct I/O event generated at the cluster device (e.g., by a virtual machine). A legacy file system filter driver of the cluster device may be used and enabled to perform the capturing of the direct I/O event. The legacy file system filter driver may be different than a CSV filter driver associated with the CSV, and may be enabled after the CSV filter driver is enabled. The captured direct I/O event may then be transmitted to the replica server using, e.g., a replication filter, to maintain a backup copy of the event at the replica server.

Abstract: Systems and methods for replicating data from a master server to a replica or backup server include capturing a read event associated with a retrieved file at the master server. The retrieved file may be generated by updating a reference file with remotely stored data. Attributes associated with the retrieved file may be checked to determine if they include attributes associated with the reference file, and if they do not, at least a portion of data and one or more attributes of the retrieved file may be copied or replicated to the replica server. The captured read event may be generated when an application attempts to access or read the retrieved file. An event associated with generation of the reference file may also be captured at the master server, and copies to the replica server.