Abstract: A method and apparatus in a distributed data processing system for providing proxy services. Requests are processed by a primary proxy, using a shared memory in the distributed data processing system. A challenge from a secondary proxy to the primary proxy is detected. A determination is made as to whether the secondary proxy has priority over the primary proxy. This may be determined using priorities assigned to the proxies. Responsive to determining whether the secondary proxy has priority over the primary proxy, a priority of the secondary proxy is stored. Responsive to the secondary proxy having priority over the primary proxy, the secondary proxy to is allowed access the shared memory. Further, the secondary proxy is then allowed to multi-cast a message to clients indicating the secondary proxy's location. This message indicates that the secondary proxy is now the primary proxy.

Abstract: A method and apparatus in a distributed data processing system for scaling servers. Access to a shared memory for a period of time is selectively provided to a server within a plurality of servers, wherein the shared memory is used by the server to process requests. All other servers within the plurality of servers are prevented from accessing the shared memory during the period of time.