A method and apparatus for inter-module communication is disclosed. The method includes defining a command definition, wherein the command definition comprises commands for interfacing with a multi-channel, multi-media, communication queuing system. The command definition can include, for example, driver object commands to request media type lists and command event lists, create drivers, request service, and release drivers. The command definition can also include, for example, service object commands to release service objects, notify when handling of an event is complete, invoke commands, release work items, suspend work items, resume work items, handle queued events, and cancel queued events. The command definition can also include, for example, client object commands to start a work item, release work items, save work item contexts, restore work item contexts, serialize work items, free work item storage, begin batch processing, and end batch processing.

Adaptive communication application programming interface

According to one aspect of the present invention, a system is provided for implementing view caching in a framework to support web-based applications. The system comprising a set of server-side objects managed by an object manager (OM) running on a server. The system further comprises a set of browser-side objects running on a browser running on a client. The system also comprises a remote procedure call (RPC) mechanism and a notification mechanism to facilitate communication and synchronization between the browser-side objects and the server-side objects. The system additionally comprises a cache on the client to store layouts of views, wherein each view is a display panel consisting of a particular arrangement of applets.

Method, apparatus, and system for implementing view caching in a framework to support web-based applications

In one embodiment, the invention of a computing system comprising a World Wide Web application (200, 210) with a user interactive record field is described. The record field receives a record field entry. The application receives a context change request. Responsive to the context change request, the application dynamically transmits the record field entry to a server (255) for storage in a database (290).

Computing system and method to implicity commit unsaved data for a world wide web application

The present solution provides a spillover management technique for virtual servers of an appliance based on bandwidth. A network administrator may configure a bandwidth threshold for one or more virtual servers, such as virtual servers providing acceleration or load balancing for one or more services. The bandwidth threshold may be specified as a number of bytes transferred via the virtual server. The bandwidth threshold may also be specified as a round trip time or derivative thereof. A user may specify the bandwidth threshold via a configuration interface. Otherwise, the appliance may establish the bandwidth threshold. The appliance monitors the bandwidth used by a first virtual server. In response to detecting the bandwidth reaching or exceeding the bandwidth threshold, the appliance dynamically directs client requests to a second virtual server.

Systems and methods for providing dynamic spillover of virtual servers based on bandwidth

Techniques are disclosed for controlling and managing virtual machines and other such virtual systems. VM execution approval is based on compliance with policies controlling various aspects of VM. The techniques can be employed to benefit all virtual environments, such as virtual machines, virtual appliances, and virtual applications. For ease of discussion herein, assume that a virtual machine (VM) represents each of these environments. In one particular embodiment, a systems management partition (SMP) is created inside the VM to provide a persistent and resilient storage for management information (e.g., logical and physical VM metadata). The SMP can also be used as a staging area for installing additional content or agentry on the VM when the VM is executed. Remote storage of management information can also be used. The VM management information can then be made available for pre-execution processing, including policy-based compliance testing.

Compliance-based adaptations in managed virtual systems

The present invention provides a method and apparatus for facilitating hot upgrades of software components within a telecommunications network device through the use of “signatures” generated by a signature generating program. After installation of a new software release within the network device, only those software components whose signatures do not match the signatures of corresponding and currently executing software components are upgraded. Signatures promote hot upgrades by identifying only those software components that need to be upgraded. Since signatures are automatically generated for each software component as part of putting together a new release a quick comparison of two signatures provides an accurate assurance that either the software component has changed or has not. Thus, signatures provide a quick, easy way to accurately determine the upgrade status of each software component.

Signatures for facilitating hot upgrades of modular software components

A common command interface (CCI) provides an interface abstraction allowing network device applications to maintain one set of code for each command regardless of which command interface (e.g., web, CLI, NMS, etc.) initiates the command. That is, the command code in each application may be shared across multiple command interfaces. The interface abstraction allows new applications including additional commands to be added to a network device and existing applications to be dynamically upgraded to include new and/or modified commands without having to modify the CCI. Thus, the network device may provide the increased flexibility of having multiple command interfaces while minimizing the complexity required to maintain commands across those interfaces. In addition, a community command interface may be used to connect the common command interfaces of multiple network devices.

Common command interface

The present invention provides a method and apparatus for supporting multiple redundancy schemes in a single network device. In one network device, various redundancy schemes are supported including 1:1, 1+1, 1:N, no redundancy or a combination of redundancy schemes. In addition, the redundancy scheme or schemes for physical network device cards (i.e., universal port cards) or ports may be different from the redundancy scheme or schemes for forwarding network device cards. For example, a network manager may want to provide 1:1 or 1+1 redundancy for all universal port cards and/or ports but only 1:N redundancy for each N group of forwarding cards. As another example, the network manager may provide certain customers with 1:1 redundancy on both universal port cards (or ports) and forwarding cards to ensure that customer's network availability while providing other customers, with lower availability requirements, with various other redundancy scheme combinations, for example, 1:1, 1+1, 1:N or no redundancy for port cards or ports and 1:N or no redundancy for forwarding cards. The present invention allows customers having different availability/redundancy needs to be serviced by same network device.

Network device for supporting multiple redundancy schemes

Methods are disclosed for establishing a path for data transmissions in a system having a plurality of possible paths by creating a configuration database and establishing internal connection paths based upon a configuration policy and the configuration database. The configuration policy can be based on available system resources and needs at a given time. In one embodiment, one or more tables are initiated in the configuration database to provide connection information to the system. For example, a path table and a service endpoint table can be employed to establishing a partial record in the configuration database whenever a user connects to a particular port on a universal port card in the system. The method can further include periodically polling records in the path table and transmitting data from the partial records to a policy provisioning manager (PPM). The PPM then implements a connection policy by comparing one or more of the new path characteristics, to the available forwarding card resources in the quadrant containing the universal port card port and path. The path characteristics can include the protocol, the desired number of time slots, the desired number of virtual circuits, and any virtual circuit scheduling restrictions. The PPM can also take other factors into consideration, including quality of service, for example, redundancy requirements or dedicated resource requirements, and balancing resource usage (i.e., load balancing) evenly within a quadrant.

Policy based provisioning of network device resources

Computer systems and methods of data processing are disclosed in which fault/event management is carried out in accordance with a configurable fault recovery policy. In addition, computer systems and methods of data processing are disclosed in which hierarchical levels of fault management (or more generally “event” management) are provided in accordance with the configurable fault policy.

Joseph D. Kidder

Papers

Signatures for facilitating hot upgrades of modular software components

Common command interface

Network device for supporting multiple redundancy schemes

Policy based provisioning of network device resources

Configurable fault recovery policy for a computer system