we are experiencing severe NFS performance problems. Small files seem to work OK, but the server becomes irresponssive when we write large files from the local disks to the NFS mount on the storage server, up to a point where we cannot even do a nomal ls.
the NFS storage is mounted in fstab with:
192.168.10.220:/data /mnt/data nfs rsize=9700,wsize=9700,hard,intr,async,proto=tcp,po rt=2049,timeo=5,retrans=3 0 0
network connection consists of two 10 Gbit cards in bond mode:
Make sure your on the latest DSS V7 w/ build 10529.
Test with the mount command with fallowing options :
-o rsize=524288,wsize=524288
Also make sure this is check in the GUI in the NFS section:
no root squash
insecure
insecure locks
If there are many NFS connection consider increasing the number of nfsd threads. This is located under Hardware console tools (ALT+CTRL+W) -> Tuning options -> NFS Daemon tuning (default is 64) try higher.
The MTU value for the 10GbE should 9000 or what the vendor recommends and make sure that all are on the same MTU values (DSS V7 and switches).