Disk Video Cache location (using NFS root)

[Fabio72]

I'm using this in fstab
rw,nolock,async,nfsvers=3,actimeo=0,udp,soft,intr,rsize=65536,wsize=65536,noatim​e

but my server is VERY busy

load average: 4.85, 4.92, 4.18 with dual core atom
6 ip cam with zoneminder
mysql with php data logging from some arduino
apache (with some reverse proxy option)
bind
fail2ban
rtorrent
cifs/nfs
ftp
softraid 5

and some tarpit honeypot with iptables