Software Status and Availability

The current prototype runs as a kernel loadable module for FreeBSD 4.3-RELEASE and implements a large subset of the DAFS specification including all basic file access, performance enhancements, locking, and client caching support operations. Besides the server, we have ported device drivers to FreeBSD for a number of VI NIC, including the Giganet/Emulex cLAN 1000 and GN 9000 VI/IP which use ATM and gigabit Ethernet respectively as their link layer transport. We anticipate to measure the performance benefits of Optimistic DAFS as soon as the transport support is implemented. Source code for the server and associated FreeBSD kernel patches can be obtained from https://www.eecs.harvard.edu/vino/fs-perf/dafs.