Am Samstag, 11. Dezember 2004 17:03 schrieb Ralf Gesel|ensetter: > as I suspected NFS to be a brake in performance, I looked around for > information on how to tune NFS.
Here, I got a collection of interesting URLs: http://www.linuxquestions.org/questions/showthread.php?s=&postid=960123 http://www.unixcircle.com/features/nfs.php There: Tuning NFS Some suggestions to tune client and server for performance: 1. If clients and servers are not on the same LAN or the network is overloaded, use TCP if possible. 2. Increase read/write packet data size. Need to increase read/write value if experienced some error messages such as ``fragments dropped due to timeout'' while still mounting. 3. Augment the number of NFS server daemons on a busy server. 4. Bump up the number of kernel threads to serve asynchronous NFS I/O requests on the NFS client. LINUX: 1. Use UDP. Only switch to TCP if client/server is not on the same LAN or packets get dropped often. 2. Edit /etc/fstab and on the 4th field which is the filesystem mount options, add rsize=32768,wsize=32768 after rw. 3. The default NFS daemon is 8. Crank up to a high number by editting /etc/init.d/nfs and change 8: # Number of servers to be started by default RPCNFSDCOUNT=8 to a suitable number. 4. Not sure if Linux has this feature to tune. Some hints for diagosing are on http://billharlan.com/pub/papers/NFS_for_clusters.html Regards Ralf
