Prasad Te Peddada

7406692, Jul 29, 2008

Feb 24, 2004

10/785778

Eric M. Halpern - San Francisco CA, US
Prasad Peddada - Albany CA, US
Naresh Revanuru - Fremont CA, US

BEA Systems, Inc. - San Jose CA

G06F 9/46
G06F 15/16

718105, 719313, 719330, 709201, 709203, 709227, 709245

A system and method for server load balancing that includes server affinity. The system can be incorporated into application servers to support load balancing algorithms for RMI objects that provide server affinity. Server affinity uses smart load balancing for external client connections in such a way that it uses preexisting connection and reduces overhead: the client considers its existing connections to the application server instances when choosing the server instance on which to access a service. If a service is configured for server affinity, the client-side stub attempts to choose a server instance to which it is already connected, and continues to use the same server instance for method calls. All stubs on that client will attempt to use that server instance. If the server instance becomes unavailable, the stubs fail over, if possible, to a server instance to which the client is already connected.

7409420, Aug 5, 2008

Oct 31, 2001

10/000708

Sam Pullara - San Francisco CA, US
Eric M. Halpern - San Francisco CA, US
Prasad Peddada - Albany CA, US
Adam Messinger - San Francisco CA, US
Dean Bernard Jacobs - Berkeley CA, US

BEA Systems, Inc. - San Jose CA

G06F 15/16

709203, 709230, 709231, 370352

A session replication system provides real-time data replication without unnecessarily slowing down the user experience. A system in accordance with the present invention may utilize a primary server to serve requests from a network client, as well as a secondary server to replicate the session information. When a request is received on the session, an attempt may be made to serve the request on the primary server. If the primary is unable to receive or respond to the request, the request may be served on the secondary application server or on a new primary server. If the secondary server receives the request, the secondary server may become the new primary server. If a new primary server is selected, the new primary may request the session information from the secondary server.

7447940, Nov 4, 2008

Apr 3, 2006

11/396826

Prasad Peddada - Fairfield CA, US

BEA Systems, Inc. - San Jose CA

G06F 11/00

714 11, 714 4, 714 10, 714 12, 714 13, 709223, 709224

A system and method for providing singleton services in a cluster of servers, where one server is designated as a cluster master, other servers are designated as migratable servers and where all servers in the cluster heartbeat their liveness information against a database. The cluster master monitors the heartbeats of all migratable servers. Upon failure of a migratable server's heartbeat, the cluster master first attempts to restart the migratable server on the same machine and if that does not succeed, the cluster master migrates the migratable server to a different machine in the cluster. In accordance with an embodiment, all migratable servers monitor the heartbeats of the cluster master. Upon failure of the cluster master's heartbeating, one migratable server takes over the role of being cluster master.

7571255, Aug 4, 2009

Feb 6, 2008

12/027078

Prasad Peddada - Albany CA, US

BEA Systems, Inc. - Redwood Shores CA

G06F 15/16

709248, 709219, 709226, 709229, 709232, 709246, 707 10, 707201

A system and method for communications between servers in a cluster. The system allows for point-to-point messaging to be used in a clustered environment to provide communication of services provided by each server or member of that cluster. Each server or member within the cluster advertises its services as before. If one of the receiving servers misses an advertisement, i. e. it becomes out-of-sync with the sending server, then the second (receiving) server makes a reliable point-to-point request to the first (sending) server asking for the missed services.

7661015, Feb 9, 2010

Oct 10, 2006

11/548239

Naresh Revanuru - Fremont CA, US
Dean Bernard Jacobs - Berkeley CA, US
Prasad Peddada - Fairfield CA, US

Bea Systems, Inc. - Redwood Shores CA

G06F 11/00

714 4, 718101, 718102

A timer master can assign scheduled jobs to other application servers of a cluster. Leases for the timer master can be started in a lease table. The timer master can store job info for the scheduled jobs in a database. In case of a crash of the application server, another application server of the cluster can be assigned the time master and use the job information to assign scheduled jobs.

7702791, Apr 20, 2010

Oct 31, 2001

10/000709

Eric M. Halpern - San Francisco CA, US
Prasad Peddada - Albany CA, US
Adam Messinger - San Francisco CA, US
Dean Bernard Jacobs - Berkeley CA, US
Sam Pullara - San Francisco CA, US

BEA Systems, Inc. - Redwood Shores CA

G06F 15/16

709227, 709228, 709229, 709231, 709230

A session replication system provides real-time data replication without unnecessarily slowing down the user experience. A system in accordance with the present invention may utilize a primary server to serve requests from a network client, as well as a secondary server to replicate the session information. When a request is received on the session, an attempt may be made to serve the request on the primary server. If the primary is unable to receive or respond to the request, the request may be served on the secondary server or on a new primary server. If the secondary server receives the request, the secondary server may become the new primary server. If a new primary server is selected, the new primary may request the session information from the secondary server.

7702947, Apr 20, 2010

Apr 3, 2006

11/396517

Prasad Peddada - Fairfield CA, US

BEA Systems, Inc. - Redwood Shores CA

G06F 12/00

714 4, 707204, 714 11, 714 13, 714 15, 709223

A system and method for enabling site failover in an application server or clustered environment. In addition to providing HTTP session state replication across servers within a cluster, the invention provides the ability to replicate HTTP session state across multiple clusters. This improves high-availability and fault tolerance by allowing clusters to be spread across multiple geographic regions, power grids, and Internet service providers.

7793302, Sep 7, 2010

Feb 21, 2003

10/372464

Prasad Peddada - Alameda CA, US
Adam Messinger - San Francisco CA, US
Anno R. Langen - Berkeley CA, US

BEA Systems, Inc. - Redwood Shores CA

G06F 9/44
G06F 9/54

719315, 719330

A system and a method for dynamic or as-needed activation of Remote Method Invocation (RMI) layer remote objects in response to a client request. Object activation allows the system to clean up or delete currently unused remote objects, and then reactivate them when a client actually needs them. An object implementation can first be created in response to a client request. The client receives a remote reference (remote ref) and an activation identifier (activation id) identifying that particular implementation. The implementation can subsequently be cleaned up or deleted during garbage collection so as to save server resources, or alternatively the object can be reused if the system is set up to maintain a pool of objects. When the client requests the same object at a later point in time, the system activates an object based on the activation ID previously received from the server.