Hello, After using nfs3 with kerberos for a while I discovered very poor performance for some file operations like creation of files. There are two observations: - the overal nfs3 performance is good: for instance copying large files works fine - this poor performance is definitely related to kerberos as the same volume exported without sec=krb5 works ~10 times faster with creating files I'd appreciate if somebody can explain this behaviour? Below are some details about NFS server and client: server: - kernel 2.6.36 - export options rw,sec=krb5,no_root_squash,no_subtree_check - nfs-utils 1.2.3 client: - kernel 2.6.38 or 2.6.39 - mout options (from /proc/mounts): rw,nosuid,nodev,noatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=krb5,mountaddr=192.168.1.219,mountvers=3,mountport=32767,mountproto=tcp,local_lock=none,addr=192.168.1.219 when the same volume exported without sec=krb5, the only option changes in /proc/mounts is sec=sys Regards, Vlad. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
