Solace Systems, Inc.

Steven Buchko

Shawn P McAllister

Jonathan L Bosloy

Greg Bertin

Wayne Burwell

Paul Kondrat

Craig Betts

David Pochopsky

Peter Ashton

Martin Barnes

Scott Drennan

Jules d'Entremont

In method of providing assured message delivery across a distributed message delivery system with low delivery latency and network traffic, a set of destinations is first identified for a set of destinations for a message received at an ingress router to the network. The received message is stored in persistent storage along with meta-data about each destination for the message before the message is routed to each identified destination. The message is only removed from persistent storage when an acknowledgement has been received from each destination indicating that the message has been successfully received.

Assured delivery message system and method

A method of performing connectivity verification in a content routed network including a plurality of routers and wherein messages are transported through the network over a message transport layer, involves sending from an originating router a ping request message over the message transport layer along a user data path to a terminating router using a content routing protocol. The terminating router responds with a ping reply message upon receipt of the ping request message, and the message transport layer is monitored for the ping reply message at the originating router. Trace messages can also be sent through the network to determine whether subscribers are reachable for messages originating from a particular publisher. Also trace messages can be sent through the network to determine whether subscriptions from a particular subscriber are reachable from a particular originating router.

Method and apparatus for operations, administration and maintenance of a network messaging layer

A method of providing router redundancy within a distributed network of routers, wherein messages are routed within the network based on virtual router identifiers, involves organizing the routers into one or more redundancy groups; assigning a physical identifier to each router in each of the redundancy groups; assigning one or more virtual identifiers to each redundancy group; selecting one of the routers of a particular redundancy group as a currently active router associated with a particular virtual identifier assigned to that redundancy group; advertising among the distributed network of routers for each redundancy group the physical identifier for the active router and information enabling other routers to determine the virtual identifier with which the currently active router is associated; and forwarding messages destined for a particular virtual router identifier to the currently active router based on the physical identifier of the currently active router.

Router redundancy in data communication networks

In a method of managing a content-based network, which is typically XML-based, and optionally may be overlaid on an underlying network having a plurality of network elements interconnected by links, a link state protocol maintains each network element's topological view of the overlay network from the underlying network. A subscription management protocol ensures dissemination of published content within the content-based network independently of the link state protocol.

Implicit routing in content based networks

A method of providing assured message delivery with low latency and high message throughput, in which a message is stored in non-volatile, low latency memory with associated destination list and other meta data. The message is only removed from this low-latency non-volatile storage when an acknowledgement has been received from each destination indicating that the message has been successfully received, or if the message is in such memory for a period exceeding a time threshold or if memory resources are running low, the message and associated destination list and other meta data is migrated to other persistent storage. The data storage engine can also be used for other high throughput applications.

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Dunrobin, Canada

Steven Buchko