Re: [gentoo-user] [SOLVED] NFS poor performance, high system load

2009-11-25 Thread Robin Atwood
On Tuesday 24 November 2009, Hal Martin wrote:
 Roy Wright wrote:
  On Nov 23, 2009, at 8:11 PM, Hal Martin wrote:
  Hello all,
 
  Sorry if it seems like this is a repeat question, but I've gone through
  my Gentoo list for the past 2 years and none of the answers provided for
  previous threads on this seem to work for me. Here's the situation:
 
 
  /etc/exports:
  /mnt/daigo  192.168.0.31(rw,insecure)
  /etc/exports:
  /var/media
  192.168.80.0/24(async,no_subtree_check,rw,no_root_squash,insecure)
 
 That's fixed it! Thanks! I'm now getting ~50MB/s over NFS. System load
 is still up around 6, but I can live with that.

FWIW, I think it is the async option that makes the difference. It certainly 
fixed it for me when I had a similar problem.

-Robin
-- 
--
Robin Atwood.

Ship me somewheres east of Suez, where the best is like the worst,
 Where there ain't no Ten Commandments an' a man can raise a thirst
 from Mandalay by Rudyard Kipling
--











Re: [gentoo-user] [SOLVED] NFS poor performance, high system load

2009-11-24 Thread Hal Martin
Roy Wright wrote:

 On Nov 23, 2009, at 8:11 PM, Hal Martin wrote:

 Hello all,

 Sorry if it seems like this is a repeat question, but I've gone through
 my Gentoo list for the past 2 years and none of the answers provided for
 previous threads on this seem to work for me. Here's the situation:


 /etc/exports:
 /mnt/daigo  192.168.0.31(rw,insecure)


 A couple of years ago, I experienced the same type of issue where nfs
 performance was a lot lower than smb.  It turned out a switch I was
 using was bad.  I suggest first minimizing your testing network, and
 then swapping components such as switches.  Others on the LinuxMCE
 list had issues with specific network drivers.

 I current use nfs between kubuntu, gentoo, and macbook (10.5.8 2GHz
 Core 2 Duo) systems.  I have media volumes on the kubuntu, and both
 gentoo systems.  I use autofs on each system for mounting the nfs
 volumes.  Here's an example of the settings:

 /etc/exports:
 /var/media
 192.168.80.0/24(async,no_subtree_check,rw,no_root_squash,insecure)
That's fixed it! Thanks! I'm now getting ~50MB/s over NFS. System load
is still up around 6, but I can live with that.

 /etc/auto.media:
 royw-gentoo-rsize=8192,wsize=8192,soft,timeo=30,rw   
 royw-gentoo:/var/media
 dad-kubuntu-rsize=8192,wsize=8192,soft,timeo=30,rw   
 dad-kubuntu:/var/media

 My macbook Connect to Server:
 nfs://royw-gentoo/var/media/public/data
 nfs://dad-kubuntu/var/media/public/data

 The no_subtree_check and the no_root_squash parameters are left over
 from when I used LinuxMCE.

 The insecure parameter is required to allow the macbook to connect.

 The rsize and wsize seem to work fine for streaming dvd iso images to
 my gentoo XBMC system over gigabit ethernet.  I've also streamed a few
 movies to my macbook and did not notice any performance issues.
Streaming movies from my gentoo box to my macbook doesn't present any
performance issues as the data rate is usually fairly low.

 My media drives are WDC WD10EACS (1TB).

 How are you testing performance?  With test procedure I can try to
 duplicate.
Large files. I'm transferring 4-7GB .mkv files, but I believe any large
file would do.

-Hal

 HTH,
 Roy