Seamless service updates for cloud-based security services

摘要: The disclosed embodiments disclose techniques for seamlessly updating a cloud-based security service. A dispatcher virtual machine (VM) executing in cloud data center receives network requests sent from clients located remote enterprise location to untrusted sites, and routes this traffic through chain of service VMs that analyze the traffic. During operation, VM determines an existing needs be upgraded updated version, instantiates includes version. then transfers flow initial update without interruption. Upon determining version is operating correctly, halts deallocates previous any other unneeded portions chain.