Citrix Systems, Inc.

Rajesh Joshi

Sudish Kumar Sah

Saravana Annamalaisami

Aman Chaudhary

Vemula Srimithra

Anil N Shetty

Tushar Kanekar

Raghav Somanahalli Narayana

Mukesh Kumar

Mahesh Mylarappa

Abhishek Kumar

Vinay Shivananda

Ashoke Saha

Shaleen Sharma

Vipin Kumar Duleb

Bhavana Ganji

Arunkanth Abbigari

Syed Mushtag Ahmed

Ankush Goyal

Abhishek Chauhan

Chiradeep Vittal

Ashwin Jagadish

Ashok Kumar Jagadeeswaran

Varun Taneja

Sovit Garg

Sudheer Thokala

Raghav Sn

Bhavana Shobhana

Meghashree Iyengar

Raghav S N

Vamsi Korrapatti

Sanchita Ghai

Sridhar Guthula

Anuradha Gupta

Ruchit Gupta

Ashwin Jagdish

Gaurav Chhawchharia

Arvind Neergunda

Improving load distribution and consistency is provided. A device intermediary to clients and servers can maintain bit values indicative of server availability stored in indices arranged in various levels. A lowest level comprises indices corresponding to a list of servers repeated multiple times. Each index in a higher level maps to a set of indices in a lower level. The device can receive a request from a client to access a server. The device can identify an index in a highest level. The device can determine a second index in the highest level that is after the index in the highest level and has a bit value indicating server availability. The device can identify an index in the lowest level mapping to the second index in the highest level. The device can select a server corresponding to the index in the lowest level.

Consistent distribution using jump table assisted hybrid hash

Improving distribution of traffic from clients to servers is provided. A device intermediary to a plurality of clients and a plurality of servers can receive a request from a client of the plurality of clients to access one of the plurality of servers. The device can determine a hash value based on at least a portion of the request received from the client. The device can identify an index of a plurality of indices listing the plurality of servers repeated a plurality of times in a deterministic shuffled order. The device can apply a cache array routing protocol (CARP) algorithm to a second plurality of servers listed in a subset of the plurality of indices around the index. The device can select a server from the second plurality of servers with a highest hash value based on the application of the CARP algorithm.

Prime re-shuffled assisted carp

The present application is directed towards systems and methods for application specific load-balancing for web servers. A device intermediary to a plurality of clients and a plurality of services executing on a plurality of servers, may receive a request from a client for an application. The device may identify an identifier for the application from a table comprising a list of applications and a corresponding identifier assigned to each application. In an embodiment, the device may establish one or more monitors to monitor each service to determine applications available on each service. In an embodiment, the device may determine that one or more services of the plurality of services provides the application and select a service from the one or more services to forward the request. The device may forward the request to the selected service.

Systems and methods for application specific load balancing

Methods and systems for performing application deployments in a computing environment are presented herein. One or more components of the computing environment may perform a canary deployment of an updated version of an application. As the canary deployment is performed, one or more determinations as to whether to continue, stop, or complete the canary deployment may be performed. These determinations may be based on one or more metrics determined by an application delivery controller of the computing environment. The application delivery controller may be configured to divert or forward traffic to application resources that execute the updated version. Additionally, the canary deployment may be performed in an automated fashion.

Canary deployment using an application delivery controller

Disclosed herein includes a system, a method, and a device for disabling services in a cluster. A master node of a plurality of nodes of a cluster can receive a disable instruction for a service of the cluster. The master node can transmit to the plurality of nodes a transition instruction to instruct the other nodes to stop accepting requests from one or more client devices for the service. The master node can receive, from each of the plurality of nodes, a client count value indicative of a number of current client connections from the one or more client devices to one or more respective nodes of the plurality of nodes. The master node can determine that the client count value is a zero value for each node of the plurality of nodes. The master node can transmit an out of service instruction to each node of the plurality of nodes to disable the service on the cluster.

Systems and methods for disabling services in a cluster

The present invention is related to a method for routing requests among a plurality of database servers. A device intermediary to a client and a plurality of database servers receives a request to access a database provided by the plurality of database servers. The plurality of database servers can include a first database server configured to process write requests and one or more second database servers configured to process read requests. The device determines that the request to access the database is a read request. The device identifies, responsive to determining that the request is a read request, one of the one or more second database servers to send the request instead of the first database server. The device then transmits the request to the identified second database server.

Systems and methods for redirect handling

The present invention is related to a method for load balancing and connection multiplexing structured query language (SQL) queries among a plurality of database servers. A device intermediary to a plurality of clients and a plurality of database servers receives an SQL query to access a database provided by the plurality of database servers from a client via a first connection established between the device and the client. The device identifies for the SQL query a policy for selecting among the plurality of servers. The policy includes an expression to identify predetermined data from content of the SQL query. The device may select a server from the plurality of servers based on applying the expression of the policy to content of the SQL query and forward the SQL query to the selected server via a second connection established between the device and the selected server.

Systems and methods for load balancing and connection multiplexing among database servers

Systems and methods of the present disclosure provide for caching, by a device intermediary to a client and a database, a result of a structured query language (SQL) query request. In some embodiments, the device intermediary to a plurality of clients and a database receives a SQL response from the database to a first SQL query request of a client of the plurality of clients. The device may maintain a cache of SQL responses from the database. The device may identify that the first SQL query request matches a rule of a policy for caching SQL responses from the database. The policy may include a cache action to take when the rule is matched. The device may perform, responsive to the policy, on the SQL response the cache action identified by the policy.

Systems and methods for caching of SQL responses using integrated caching

The present disclosure is directed to systems and methods for performing load balancing and message routing by a device intermediary to a plurality of short message peer to peer (SMPP) clients and a plurality of SMPP servers. The device can receive a request from an SMPP client to establish an SMPP session, replace a first sequence identifier in the request with a second sequence identifier generated by the device, and store a mapping of the second sequence identifier to the first sequence identifier. The device can select an SMPP server to forward the request with the second sequence identifier and receive a response from the SMPP server with the second sequence identifier. The device can identify, from the mapping, the first sequence identifier and the connection to the SMPP client using the second sequence identifier to forward the SMPP response with the first sequence identifier.

Systems and methods for performing load balancing and message routing for short message peer to peer protocol

The present application is related to a system and method for load balancing and connection multiplexing structured query language (SQL) queries among a plurality of database servers. A device intermediary to a plurality of clients and a plurality of database servers receives an SQL query to access a database provided by the plurality of database servers from a client via a first connection established between the device and the client. The device identifies for the SQL query a policy for selecting among the plurality of servers. The policy includes an expression to identify predetermined data from content of the SQL query. The device may select a server from the plurality of servers based on applying the expression of the policy to content of the SQL query and forward the SQL query to the selected server via a second connection established between the device and the selected server.

The present disclosure is directed towards systems and methods for application performance measurement. A device may receive a first document for transmission to a client, comprising instructions for the client to transmit a request for an embedded object. A flow monitor executed the device may generate a unique identification associated with the first document, the unique identification identifying a first access of the first document, and transmit the first document and unique identification to the client. The device may receive, from the client, a request for the embedded object comprising the unique identification, and transmit, to a server, the request for the embedded object at a transmit time. The device may receive, from the server, the embedded object at a receipt time, and may transmit a performance record comprising an identification of the object, the server, the transmit time, the receipt time, and the unique identification to a data collector.

Systems and methods for exporting client and server timing information for webpage and embedded object access

The present disclosure is directed towards tracking application layer flow via a multi-connection intermediary. Transaction level or application layer information may be tracked via the intermediary, including one or more of: (i) the request method; (ii) response codes; (iii) URLs; (iv) HTTP cookies; (v) RTT of both ends of the transaction in a quad flow arrangement; (vi) server time to provide first byte of a communication; (vii) server time to provide the last byte of a communication; (viii) flow flags; or any other type and form of transaction level data may be captured, exported, and analyzed. The application layer flow or transaction level information may be provided in an IPFIX-compliant data record. This may be done to provide template-based data record definition, as well as providing data on an application or transaction level of granularity.

Systems and methods for tracking application layer flow via a multi-connection intermediary device

Growing community of inventors

Bengaluru, India

Rajesh Joshi