Monitoring usage of WAN optimization devices integrated with content delivery networks
Granted: July 15, 2014
Patent Number:
8782395
Content delivery networks may associate each WAN optimized network connection with a specific client-to-cloud-service connection using connection identifiers. When an edge node of a content delivery network receives or intercepts a network connection request from a client device including an auto-discovery indicator from an upstream WAN optimization module, the edge node stores a connection identifier for this network connection. The edge node sends a connection response back to the…
System for selecting a proxy pair based on configurations of autodiscovered proxies on a network
Granted: June 24, 2014
Patent Number:
8762569
Network devices include proxies and where multiple proxies are present on a network, they can probe to determine the existence of other proxies. Where more than two proxies are present and thus different proxy pairings are possible, the proxies are programmed to determine which proxies should form a proxy pair. Marked probe packets are used by proxies to discover each other and probing is done such a connection can be eventually formed even if some probe packets fail due to the marking.…
Transaction accelerator for client-server communications systems
Granted: June 24, 2014
Patent Number:
8762455
For an accelerated transaction, a client directs a request to a client-side transaction handler that forwards the request to a server-side transaction handler, which in turn provides the request, or a representation thereof, to a server for responding to the request. The server sends the response to the client via the server-side transaction handler and the client-side transaction handler. When data is to be sent between handlers, the sending transaction handler compares data segments…
Multi-tier message correlation
Granted: June 17, 2014
Patent Number:
8756312
A system and method determines correlations within multi-tier communications based on repeated iterations/episodes of executions of a target application. Content-based correlations are determined by encoding the content using a finite alphabet, then searching for similar sequences among the multiple traces. By encoding the content to a finite alphabet, common pattern matching techniques may be used, including, for example, DNA alignment algorithms. To facilitate alignment of the traces,…
Ensuring write operation consistency using multiple storage devices
Granted: June 3, 2014
Patent Number:
8745320
Relatively small capacity solid-state storage devices (SSD) are combined with larger capacity magnetic disk storage devices for storing storage block write data to ensure data consistency. Write operations are stored in a sequential write buffer in an SSD to guarantee the storage of write data and then copied from the sequential write buffer to the destination address in a magnetic disk storage device. The sequential write buffer store write data in locations corresponding to the order…
Network delay analysis including parallel delay effects
Granted: June 3, 2014
Patent Number:
8745215
The embodiments facilitate the analysis of application delays, including delays that occur on multiple paths. A trace file of an application's network events is processed to categorize the causes of delays incurred in the propagation and processing of these events. The system identifies the amount of delay that can be eliminated by eliminating each of the components of delay individually, as well as the amount of delay that can be eliminated by eliminating combinations of the delay…
System and method for modeling a system that comprises networks connected across a third party external network based on incomplete configuration data
Granted: June 3, 2014
Patent Number:
8743742
The present system includes a system, method and device for inferring connectivity between network devices across a third party network. Configuration data related to the network devices is examined and configuration data about the network is inferred. The inferred configuration data may be related to a communication protocol, network bandwidth, and the like. A model representing the network is then created to indicate inferred interfaces and connections through the external network…
Inferring connectivity in the presence of conflicting network data
Granted: June 3, 2014
Patent Number:
8743736
The connectivity information provided by a variety of inference engines is integrated to provide a set of inferred links within a network. A consolidation is performed among inference engines that operate at a base level of connectivity detail to create a model of the network at this base level. The connectivity information provided by inference engines at each subsequent higher level of connectivity abstraction is then overlaid on the base level connectivity. By separately consolidating…
Configuring and authenticating WAN optimization devices for accessing content delivery networks
Granted: May 27, 2014
Patent Number:
8739244
WAN optimization devices and content delivery networks together optimize network traffic on both private networks and public WANs such as the internet. A WAN optimization device intercepts and optimizes network traffic from clients within a private network. The WAN optimization device communicates this first optimized network traffic to the nearest edge computer in the content delivery network via a public WAN, such as the internet. This edge computer further optimizes the network…
Service network discovery
Granted: May 13, 2014
Patent Number:
8725859
An automated service discovery and monitoring utility employs automatically generated policies (rules) for monitoring network health of a service based on network discovery using flow data derived from transmissions sent over segments between computing components defining the service. An interactive discovery application employs flow data based on transmissions associated with a service. Analysis of the flow data identifies associated components from inspection of the transmissions.…
Assessing application performance with an operational index
Granted: May 13, 2014
Patent Number:
8725741
The present invention relates to a system and method for assessing application performance and user satisfaction. In one embodiment, the system and method calculates an Operational Index (OPdex) representing user satisfaction with an application. The OPdex may be a number quantifying user satisfaction with an application, such as a web application, and system performance. The OPdex may be based on one or more measurable metrics having a range of values that may affect user satisfaction…
Network multi-path discovery
Granted: May 13, 2014
Patent Number:
8724494
Potential paths between a source and destination of a network are identified based on trace-route information, then filtered to eliminate paths or links that are not supported by ancillary information associated with the network so as to identify feasible/actual paths between the source and destination. The ancillary information includes, for example, routing tables and ARP tables. If a feasible path cannot be identified based on the ancillary information, supplemental information…
Tiered storage interface
Granted: May 6, 2014
Patent Number:
8719362
The cloud storage services are extended with a cloud storage service access protocol that enables users to specify a desired storage tier for each data stream. In response to receiving storage tier specifiers via the protocol, the cloud storage service performs storage operations to identify target storage devices having attributes matching those associated with the requested storage tier. The cloud storage service stores a data stream from the storage client in the identified target…
Split termination of secure communication sessions with mutual certificate-based authentication
Granted: April 22, 2014
Patent Number:
8707043
A method and apparatus are provided for split-terminating a secure client-server communication connection when the client and server perform mutual authentication by exchanging certificates, such as within a Lotus Notes environment. When the client submits a certificate to the server, an intermediary device intercepts the certificate and submits to the server a substitute client certificate generated by that intermediary. A certificate authority's private key is previously installed on…
Multi-variate network survivability analysis
Granted: April 15, 2014
Patent Number:
8700958
Network survivability is quantified in such a way that failure cases can be compared and ranked against each other in terms of the severity of their impact on the various performance measures associated with the network. The degradation in network performance caused by each failure is quantified based on user-defined sets of thresholds of degradation severity for each performance measure. Each failure is simulated using a model of the network, and a degradation vector is determined for…
Routing validation
Granted: April 15, 2014
Patent Number:
8699493
A simulator simulates routing system protocols to build routing tables corresponding to a modeled network, and a comparator compares the routing tables in the actual network to these simulator-created routing tables. Because the modeled system represents a fault-free version of the actual system, and assuming that the modeled routing system protocols are representative of the algorithms used in the actual routers, these simulator-produced routing tables can represent steady-state routing…
Capture, analysis, and visualization of concurrent system and network behavior of an application
Granted: April 8, 2014
Patent Number:
8694621
A first capture system that captures network communication events related to an application, and a second capture system that captures internal processing events related to the application. A visualization system analyzes the data captured by each of the capture systems, synchronizes and correlates the data, and presents an integrated display of these communication and processing events. In a preferred embodiment, the communicated messages include an identifier of the application, and…
Cloud synthetic backups
Granted: April 8, 2014
Patent Number:
8694469
Synthetic backups are created without accessing previous backup data or retrieving backup data from a cloud storage service. A backup system provides two or more backup data sets to a cloud spanning storage interface for storage in deduplicated form as label maps and data segments in a cloud storage service. A specification defines portions of two or more previous backup data sets to be copied into the synthetic backup. Labels corresponding with the specified portions of previous backup…
Methods and system for modeling wireless communications in a network
Granted: April 8, 2014
Patent Number:
8693493
The embodiments relate to modeling wireless communications in a network. In wireless communications, the nodes share one or more wireless communication channels. When a node has data to transmit, it must contend with the other nodes for access to the wireless communication channel. In the embodiments, the model is configured to simulate the throughput effects of contention including delays caused by retransmissions due to interference and collisions, listen-and-backoff, unavailability of…
Establishing network connections between transparent network devices
Granted: April 1, 2014
Patent Number:
8688844
Transparent network devices intercept messages from non-transparent network devices that establish a connection. Transparent network devices modify these messages to establish an inner connection with each other. The transparent network devices mimic at least some of the outer connection messages to establish their inner connection. The mimicked messages and any optional reset messages are intercepted by the transparent network devices to prevent them from reaching the outer connections.…
