> > I tried moving a client NFS mount to async. The result is that the > > server never sees a filesync again from that client. > > Further testing shows that server with -o log / client with -o async has > no performance problem. OTOH, the client sometimes complain about write > errors. -o async seems dangerous.
-o async is very dangerous. there's not even the vaguest guarantee that even fsck can help you after a crash in that case... .mrg.