ymmv, but i've been happier since i spent the time to migrate from nfs
to a squashfs image over http and git (or http) forĀ FAI_CONFIG_SRC.

the image can be generated from an existing nfsroot (cf. fai-cd(8)):
fai-cd -f -d "" -SMeJ /srv/www/fai/jessie-amd64.img

and dracut told to use it via a pxelinux.cfg similar to:
serial 1 115200 0
default fai-generated

label fai-generated
kernel fai/vmlinuz-4.4.6-fai-amd64
append initrd=fai/initrd.img-4.4.6-fai-amd64 ip=dhcp \
    root=live:https://myhost.us.archive.org/fai/jessie-amd64.img rd.noverifyssl 
aufs \
    console=tty0 console=ttyS1,115200n8 \
FAI_CONFIG_SRC=git+ssh://g...@myhost.us.archive.org/fai.git FAI_ACTION=sysinfo

[line continuations added]

andrew bezella <abeze...@archive.org>
internet archive

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