NFS problems with AOS 4.3

Thread View: comp.sys.ibm.pc.rt

4 messages

[T] Back to Threads [V] Tree View [G] Group Articles

4 total messages Started by Steve Dyer Sun, 14 Oct 1990 05:24

#926

Author: Steve Dyer
Date: Sun, 14 Oct 1990 05:24

19 lines
1191 bytes

I saw this about a year ago when a DECStation 3100 was an NFS client
of an RT running AOS 4.3 10/88.  Now, I've got a Cayman GatorBox trying
to use the same RT as an NFS server and the same error appears:

xdr_bytes: bad size FAILED

This appeared on the DS3100 only with large files being manipulated
thru the server.  Similarly, on the Mac, large file copies on the Mac
fail because of this.  I haven't yet found just how large the files
have to be to cause this to fail.  Trivial size files (<3K) seem to
work OK, whereas 700K files fail.

Has anyone investigated, more fully characterized and fixed this
problem on the RT?

-- 
Steve Dyer
dyer@ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
dyer@arktouros.mit.edu, dyer@hstbme.mit.edu

Re: NFS problems with AOS 4.3

#925

Author: Steve Dyer
Date: Sun, 14 Oct 1990 07:40

17 lines
1176 bytes

In article <4456@spdcc.SPDCC.COM> dyer@ursa-major.spdcc.com (Steve Dyer) writes:
>I saw this about a year ago when a DECStation 3100 was an NFS client
>of an RT running AOS 4.3 10/88.  Now, I've got a Cayman GatorBox trying
>to use the same RT as an NFS server and the same error appears:
>
>xdr_bytes: bad size FAILED

NFS_MAXDATA was 4096 instead of 8192 in the AOS 4.3 Dec 88 kernel.
Any NFS client talking to an RT server using a wsize greater than
4096 would eventually hit this problem.

End of mystery, and an easy solution.

-- 
Steve Dyer
dyer@ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
dyer@arktouros.mit.edu, dyer@hstbme.mit.edu

Re: NFS problems with AOS 4.3

#954

Author: Dan Ehrlich
Date: Tue, 23 Oct 1990 18:09

23 lines
1600 bytes

In article <4456@spdcc.SPDCC.COM> dyer@spdcc.COM (Steve Dyer) writes:

Steve> I saw this about a year ago when a DECStation 3100 was an NFS client
Steve> of an RT running AOS 4.3 10/88.  Now, I've got a Cayman GatorBox trying
Steve> to use the same RT as an NFS server and the same error appears:

Steve> xdr_bytes: bad size FAILED

Steve> This appeared on the DS3100 only with large files being manipulated
Steve> thru the server.  Similarly, on the Mac, large file copies on the Mac
Steve> fail because of this.  I haven't yet found just how large the files
Steve> have to be to cause this to fail.  Trivial size files (<3K) seem to
Steve> work OK, whereas 700K files fail.

Steve> Has anyone investigated, more fully characterized and fixed this
Steve> problem on the RT?

The RT's NFS implementation will only accept/generate transfers of 4Kb or
less.  If you can get the GatorBox to restrict it's requests to 4Kb you
should be OK.

--
Dan Ehrlich <ehrlich@cs.psu.edu>/Voice: +1 814 863 1142/FAX: +1 814 865 3176

Re: NFS problems with AOS 4.3

#960

Author: Werner Vogels
Date: Fri, 26 Oct 1990 20:21

35 lines
2055 bytes

In article <Frsqa6y2@cs.psu.edu>, ehrlich@cs.psu.edu (Dan Ehrlich) writes:
- In article <4456@spdcc.SPDCC.COM> dyer@spdcc.COM (Steve Dyer) writes:
- 
- Steve> I saw this about a year ago when a DECStation 3100 was an NFS client
- Steve> of an RT running AOS 4.3 10/88.  Now, I've got a Cayman GatorBox trying
- Steve> to use the same RT as an NFS server and the same error appears:
- 
- Steve> xdr_bytes: bad size FAILED
- 
- Steve> This appeared on the DS3100 only with large files being manipulated
- Steve> thru the server.  Similarly, on the Mac, large file copies on the Mac
- Steve> fail because of this.  I haven't yet found just how large the files
- Steve> have to be to cause this to fail.  Trivial size files (<3K) seem to
- Steve> work OK, whereas 700K files fail.
- 
- Steve> Has anyone investigated, more fully characterized and fixed this
- Steve> problem on the RT?
- 
- The RT's NFS implementation will only accept/generate transfers of 4Kb or
- less.  If you can get the GatorBox to restrict it's requests to 4Kb you
- should be OK.
- 
- --
- Dan Ehrlich <ehrlich@cs.psu.edu>/Voice: +1 814 863 1142/FAX: +1 814 865 3176

Steve has already indicated the solution: NFS_MAXDATA should be 8Kb. We had 
the same problems as Steve and with the new kernel everything works fine.


Werner H.P. Vogels

Software Expertise Centrum                      
Haagse Hogeschool, Intersector Informatica     tel: +31 70 618419
Louis Couperusplein 2-19, 2514 HP Den Haag     E-mail: werner@nikhefk.nikhef.nl
The Netherlands                                     or werner@hhinsi.uucp

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads