UFS2 Snapshots in 6.1-Beta4 - Confirmed Problems

[Kris Kennaway]

On Thu, Mar 23, 2006 at 11:34:40PM +0300, Eugene wrote:
> Hi all!
> 
> While we're on the topic of snapshots, I recently posted this follow-up to 
> the PR kern/66270 "[hang] dump causes machine freeze"
> 
> >I wonder what is the status of this PR?
> > I seem to have the same problem with 5.3-RELEASE.
> >
> > Before this started, system worked nicely for more than a year and then 
> >it
> > started to hang during dump (seemingly just after mksnap_ffs) first
> > intermittently and now reproducibly (might increase in data size be a
> > factor? though disk is only about 18% full).
> > Originally it hanged and console had complains about increasing
> > PMAP_SHPGPERPROC and maxproc.
> > After some talk in freebsd-fs, I adjusted these parameters and now it 
> >just
> > hangs without complaining =((
> >
> > Any suggestions?
> 
> In addition to this PR, I found a couple of similar threads in different 
> lists but they all just have some initial talk and preliminary analysis, 
> and then it just stops. Was that snapshot problem fixed or is it the same 
> as we are talking now? I can't believe I am the only one in almost 2 years 
> who is (trying to be) doing automated backups...
> So, if it was fixed, when (which version)? If not, then when it might be 
> and -- in the meantime -- is there any workaround for backups? (The system 
> is the production server on the colocation so doing backups in single-user 
> mode is not practical).

6.1.

Kris
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