Amanda-Users

Re: packet too large

2009-10-21 16:33:24
Subject: Re: packet too large
From: Brian Cuttler <brian AT wadsworth DOT org>
To: "Dustin J. Mitchell" <dustin AT zmanda DOT com>
Date: Wed, 21 Oct 2009 16:22:21 -0400
Dustin,

> At least one problem (the buffer size error, I think) was fixed in
> 2.5.2 (and thus in 2.6.1 as well), but it may not be the same problem
> you experienced.  Have you upgraded?  Does the problem still occur?

This system was a new deployment on a the Solaris 10/sparc
server that I've written so many emails about.

The client we hit the issue with, perhaps a month ago, is
Solaris 10/x86.

Amanda version on both is the same, 2.6.1p1.

The client system has ZFS mount points for each user directory
as well as zfs mount points for each samba share (allowing
for individualized quotas, either through samba or direct use).

We hit, I think 70-some DLEs and hit the packet limit. At that
time we (you and I, I think) had a discussion about the --one-filesystem
switch, thought of trying to backup /export/home as a single DLE
rather than one per user.

Ultimately we decided to glob the users alphabetically (which
resulted in a patch from Jean-Louis concerning the zfs snapshot
naming convention, provided yesterday as yet untested).

So we are capped at 26 DLEs for users, however we continue to
migrate samba shares to the client server.

We are not currently having a packet size issue, but suspect
it will re-occur sooner rather than later.

                                                thanks,

                                                Brian

On Wed, Oct 21, 2009 at 04:13:26PM -0400, Dustin J. Mitchell wrote:
> On Wed, Oct 21, 2009 at 3:29 PM, Brian Cuttler <brian AT wadsworth DOT org> 
> wrote:
> > We hit the problem of the TCP packet being too large
> > with amanda 2.6.1p1, though this threat indicates a
> > fix at 2.5.2.
> >
> > http://forums.zmanda.com/showthread.php?t=1005
> >
> > Is the problem corrected or does 2.6.1 require a patch
> > or something ?
> 
> At least one problem (the buffer size error, I think) was fixed in
> 2.5.2 (and thus in 2.6.1 as well), but it may not be the same problem
> you experienced.  Have you upgraded?  Does the problem still occur?
> 
> Dustin
> 
> -- 
> Open Source Storage Engineer
> http://www.zmanda.com
---
   Brian R Cuttler                 brian.cuttler AT wadsworth DOT org
   Computer Systems Support        (v) 518 486-1697
   Wadsworth Center                (f) 518 473-6384
   NYS Department of Health        Help Desk 518 473-0773



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