US Patent 9344494 Failover data replication with colocation of session state data

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.