[OpenAFS] solaris 10 versions supporting inode fileservers

[Dan Pritts]

Perhaps someone could update the inode fileserver to check whether the
filesystem is mounted with logging?  And refuse to start if so?

It looks like a quick call to getmntany() would tell you.

It wouldn't prevent someone from coming along and remounting the filesystem
with logging enabled once the fileserver had started, but i imagine it will 
save someone some trouble somewhere along the line.

On Tue, May 05, 2009 at 06:30:31PM -0400, Jason Edgecombe wrote:
> Harald Barth wrote:
> >>Does anyone have any information on which versions of solaris 10
> >>are not safe?  Any direction to a bug report or a mail list thread
> >>would be appreciated.
> >>    
> >
> >I think the sneaky thing was that
> >  a) UFS with logging may rot your files
> >  b) Some update made logging the default mount option
> >I don't think ZFS is safe either.
> >
> >Harald.
> ufs without logging is the only safe option for the inode fileserver on 
> solaris.
> 
> The default logging option was changed in Solaris 9 9/04
> See http://docs.sun.com/app/docs/doc/817-5770/6ml72d6kd?a=view
> 
> It's sneaky because the default is logging is on for disks over 100G or 
> some similar threshold.
> 
> UFS with logging WILL eat data with the inode server, you will have to 
> salvage on each service restart when the /vicepX is unmounted and 
> remounted (i.e. every boot/reboot).
> 
> The namei fileserver is safe for ufs (with or without logging) and ZFS 
> filesystems on solaris.
> 
> Use namei, it's safer and faster on ufs w/logging than inode without 
> logging.
> 
> BTW, where should I document tidbits like this?
> 
> Sincerely,,
> Jason
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danno
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Dan Pritts, Sr. Systems Engineer
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