[mythtv-users] diskless frontend nfs throughput

[Alan Marchiori]

On Thu, Aug 6, 2009 at 12:05 PM, Dan Littlejohn<dan.littlejohn at gmail.com> wrote:
> I have a gentoo diskless frontend that mounts using nfs and it seems like
> the throughput of nfs is slow.  iperf show the network able to push 770 Mb/s
> and hdparm shows the sata disk on the server at 90 Mb/s, but doing a dd
> across the network only shows up as 10 Mb/s  (is about 40 Mb/s when the same
> test is done on the server to a third machine).
>
> Odd thing is that the pxeboot mounts nfsver2.  Not sure if this is a problem
> or not, but other mounts after boot mount as nfsver3.  Really seems like it
> is a config problem with nfs somewhere, but I have not found anything that
> makes a difference.  Doing rsize=8k,wsize=8k, noatime, async.  Anyone have
> any tips to look for or is this 10 Mb/s really the throughput I should
> expect for a diskless frontend?
>

Way back when I started using myth (years ago) I read that nfs
performance was poor and smb/cifs was much faster and the
recommendation was to mount recordings/videos with smb/cifs.  I'm not
sure if this is true anymore but I still use smb/cifs for that reason.
 On a diskless machine I doubt you could mount the root with smb/cifs
but for everything else you could.