nfs optimization settings in the automounter

nfs optimization settings in the automounter

[Justin Rush]

I am having a hard time telling the automounter to use the options 
rsize=32768,wsize=32768 when automounting home directories.  I have 
tried specifying these options in the auto.home file on my nis master 
server ( -rw,soft,rsize=32768,wsize=32768 nismaster:/export/home/jrush )
I have also tried to put them in the localoptions setting in the autofs 
init file ( localoptions='rsize=32768,wsize=32768' ) on both the nis 
master and on the client machines.
I also tried to specify these options in the auto.master file on the nis 
master (the client machines don't have auto.master files because they 
read the nis master's file ) ( /etc/auto.home  
--timeout=43200,rsize=32768,wsize=32768 )
I have also tried to use lower settings such as 16384

however when I look in /proc/mounts on the client machine it is either 
mounted with 4096 or 8192

My setup is as follows:
All the machines are running redhat 9 using Linux automount version 
3.1.7 and nfs version 3

Justin Rush
Technical Specialist
Internet Scout Project
jrush@scout.wisc.edu

Re: nfs optimization settings in the automounter

[H. Peter Anvin]

Justin Rush wrote:
> I am having a hard time telling the automounter to use the options
> rsize=32768,wsize=32768 when automounting home directories.  I have
> tried specifying these options in the auto.home file on my nis master
> server ( -rw,soft,rsize=32768,wsize=32768 nismaster:/export/home/jrush )
> I have also tried to put them in the localoptions setting in the autofs
> init file ( localoptions='rsize=32768,wsize=32768' ) on both the nis
> master and on the client machines.
> I also tried to specify these options in the auto.master file on the nis
> master (the client machines don't have auto.master files because they
> read the nis master's file ) ( /etc/auto.home 
> --timeout=43200,rsize=32768,wsize=32768 )
> I have also tried to use lower settings such as 16384
> 
> however when I look in /proc/mounts on the client machine it is either
> mounted with 4096 or 8192
> 

Are you using NFSv3?  As far as I know I think 8192 is max for NFSv2, at
least for most of the NFSv2 servers I know.

Try doing the mounting without using autofs.  If the same thing happens,
it's an NFS issue, not an autofs issue.

	-hpa

Re: nfs optimization settings in the automounter

[Justin Rush]

I am using nfs v3 and I can mount it manually with these options.

H. Peter Anvin wrote:

>Justin Rush wrote:
>  
>
>>I am having a hard time telling the automounter to use the options
>>rsize=32768,wsize=32768 when automounting home directories.  I have
>>tried specifying these options in the auto.home file on my nis master
>>server ( -rw,soft,rsize=32768,wsize=32768 nismaster:/export/home/jrush )
>>I have also tried to put them in the localoptions setting in the autofs
>>init file ( localoptions='rsize=32768,wsize=32768' ) on both the nis
>>master and on the client machines.
>>I also tried to specify these options in the auto.master file on the nis
>>master (the client machines don't have auto.master files because they
>>read the nis master's file ) ( /etc/auto.home 
>>--timeout=43200,rsize=32768,wsize=32768 )
>>I have also tried to use lower settings such as 16384
>>
>>however when I look in /proc/mounts on the client machine it is either
>>mounted with 4096 or 8192
>>
>>    
>>
>
>Are you using NFSv3?  As far as I know I think 8192 is max for NFSv2, at
>least for most of the NFSv2 servers I know.
>
>Try doing the mounting without using autofs.  If the same thing happens,
>it's an NFS issue, not an autofs issue.
>
>	-hpa
>  
>

-- 
Justin Rush
Technical Specialist
Internet Scout Project
jrush@scout.wisc.edu

Re: nfs optimization settings in the automounter

[Greg Bradner]

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It's an nfs limitation. Reconfig your server and change this option: 

"include/linux/nfsd/const.h" in the kernel source shows the following
definition

/*
 * Maximum blocksize supported by daemon currently at 8K
 */
#define NFSSVC_MAXBLKSIZE       8192




H. Peter Anvin wrote:

>Justin Rush wrote:
>  
>
>>I am having a hard time telling the automounter to use the options
>>rsize=32768,wsize=32768 when automounting home directories.  I have
>>tried specifying these options in the auto.home file on my nis master
>>server ( -rw,soft,rsize=32768,wsize=32768 nismaster:/export/home/jrush )
>>I have also tried to put them in the localoptions setting in the autofs
>>init file ( localoptions='rsize=32768,wsize=32768' ) on both the nis
>>master and on the client machines.
>>I also tried to specify these options in the auto.master file on the nis
>>master (the client machines don't have auto.master files because they
>>read the nis master's file ) ( /etc/auto.home 
>>--timeout=43200,rsize=32768,wsize=32768 )
>>I have also tried to use lower settings such as 16384
>>
>>however when I look in /proc/mounts on the client machine it is either
>>mounted with 4096 or 8192
>>
>>    
>>
>
>Are you using NFSv3?  As far as I know I think 8192 is max for NFSv2, at
>least for most of the NFSv2 servers I know.
>
>Try doing the mounting without using autofs.  If the same thing happens,
>it's an NFS issue, not an autofs issue.
>
>	-hpa
>
>_______________________________________________
>autofs mailing list
>autofs@linux.kernel.org
>http://linux.kernel.org/mailman/listinfo/autofs
>  
>

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Re: nfs optimization settings in the automounter

[H. Peter Anvin]

Justin Rush wrote:
> I am using nfs v3 and I can mount it manually with these options.

If so, please enable *.debug output in syslog and look at the output
from the automounter in the syslog.

	-hpa

Re: nfs optimization settings in the automounter

[Ian Kent]

On Tue, 18 Nov 2003, H. Peter Anvin wrote:

> Justin Rush wrote:
> > I am having a hard time telling the automounter to use the options
> > rsize=32768,wsize=32768 when automounting home directories.  I have
> > tried specifying these options in the auto.home file on my nis master
> > server ( -rw,soft,rsize=32768,wsize=32768 nismaster:/export/home/jrush )
> > I have also tried to put them in the localoptions setting in the autofs
> > init file ( localoptions='rsize=32768,wsize=32768' ) on both the nis
> > master and on the client machines.
> > I also tried to specify these options in the auto.master file on the nis
> > master (the client machines don't have auto.master files because they
> > read the nis master's file ) ( /etc/auto.home
> > --timeout=43200,rsize=32768,wsize=32768 )
> > I have also tried to use lower settings such as 16384
> >
> > however when I look in /proc/mounts on the client machine it is either
> > mounted with 4096 or 8192
> >
>
> Are you using NFSv3?  As far as I know I think 8192 is max for NFSv2, at
> least for most of the NFSv2 servers I know.

Yep. Saw it in the 2.4 source the other day.

NFSv3 has a maximum of 32768.

-- 

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