Current NFS/Linux not support SCTP
Phillip Huang:NFSv4 supports TCP and UDP, does this implementation affect the relative operations(mount/read/write) on NFS share exported from underlying GFS filesystem, which indicates it uses SCTP protocol only?
Talpey Thomas:The Linux NFSv4 implementations supports UDP, but NFSv4 specification forbids it. A congestion controlled transport is required, and UDP does not quaility. However, in theory SCTP and DCCP are candidates. There are no port assignments for NFS on these transports.
Phillip Huang:Or if I want use NFS on GFS smoothly, shall I need to add TCP support to GFS?
Talpey Thomas: No, it is perfectly acceptable to use TCP connection for NFS, and an SCTP connection for GFS. The NFS daemon effectively function as a gateway, isolating both side from any issues