On Fri, 2005-09-23 at 15:55 -0500, Roman Romaniuk wrote: > >On 9/23/05, Ryan Steffes <[EMAIL PROTECTED]> wrote: > > > >I think my problem resides somewhere in the NFS system. I also note > >looking at the output of ifconfig that both the backend side and the > >NFS server are logging thousand up thousand 'collisions'. I need to > >fix that next.
This sounds like a half vs full duplex problem. > NFS works very well for reading, not so well for writing. NFS absolutely > insists (for a whole bunch of valid reasons) on commiting the data to disk > before returning, resulting in very poor write performance as there is no > buffering. Your best bet is writing to a local hard disk. In the server side /etc/exports file I have: # TV system exports /mnt/d4/tv client(rw,no_root_squash,async,no_subtree_check) The async helps with the write performance but at the risk of data loss if the power goes down. I also have no version 2 support, and use nfs over tcp rather than udp. On the client side fstab: server:/mnt/d4/tv /mnt/d4/tv nfs \ defaults,wsize=32768,rsize=8192,noatime,hard,nfsvers=3,async 1 1 Provides good performance for my setup (3 streams over NFS without a hiccup). YMMV. Cheers, Mark
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