1. A method of storage medium management in nodes of a high availability cluster that serves a network client, said method comprising: a) providing a number k of said nodes, where k≧2 and includes a master node, with a high-access-rate storage medium and a low-access-rate storage medium; b) writing a file to said high-access-rate storage medium of a serving node selected from among k-1 nodes excluding said master node; c) writing said file to said low-access-rate storage medium of each of k-2 nodes excluding said master node and said serving node; d) monitoring an availability of said file on said high-access-rate storage medium of said serving node to said network client with a storage medium management protocol distributed among said k nodes; e) migrating said file from said low-access-rate storage medium of a back-up node selected from among said k-1 nodes to said high-access-rate storage medium of said back-up node upon disruption of said availability on said serving node; thereby providing for high availability of said file to said network client.