Abstract: A method, system, and medium are disclosed for performing failover data replication with colocation of session state data. In servicing a client request, a first session is created on a primary server. A first portion of session data comprises a state of the first session and is stored on the primary server. An identifier of the first session is stored on the primary server. One or more backup servers are selected for backup of the first portion of session data. A second session is created on the primary server. A second portion of session data comprises a state of the second session and is stored on the primary server. The same backup server(s) are selected for backup of the second portion based on the stored identifier of the first session. The primary server replicates the first and second portions of session data into memory space of the backup servers.

Abstract: A method, system, and medium are disclosed for performing transparent failover in a cluster server system. The cluster includes a plurality of servers. In servicing a client request, a primary server replicates session data for the client into memory space of one or more backup servers. The primary server sends a response to the client, wherein the response includes an indication of the one or more backup servers. When the client sends a subsequent request, it includes an indication of the backup servers. If the primary server is unavailable, the cluster determines a recovery server from among the backup servers indicated by the request. The chosen recovery server would then service the request.

Abstract: A method, system, and medium are disclosed for performing failover data replication with colocation of session state data. In servicing a client request, a first session is created on a primary server. A first portion of session data comprises a state of the first session and is stored on the primary server. An identifier of the first session is stored on the primary server. One or more backup servers are selected for backup of the first portion of session data. A second session is created on the primary server. A second portion of session data comprises a state of the second session and is stored on the primary server. The same backup server(s) are selected for backup of the second portion based on the stored identifier of the first session. The primary server replicates the first and second portions of session data into memory space of the backup servers.

Abstract: A method, system, and medium are disclosed for performing transparent failover in a cluster server system. The cluster includes a plurality of servers. In servicing a client request, a primary server replicates session data for the client into memory space of one or more backup servers. The primary server sends a response to the client, wherein the response includes an indication of the one or more backup servers. When the client sends a subsequent request, it includes an indication of the backup servers. If the primary server is unavailable, the cluster determines a recovery server from among the backup servers indicated by the request. The chosen recovery server would then service the request.