[Info-vax] SSSU command ?

[pcoviello at gmail.com]

On Tuesday, October 23, 2012 6:52:12 PM UTC-4, Stephen Hoffman wrote:
> On 2012-10-23 21:43:38 +0000, Steven Schweda said:
> 
> 
> 
> >    Although you provided no description of your environment,
> 
> > the path names suggest some kind of Windows system.  Why are
> 
> > you asking what looks like a Windows question in a VMS forum?
> 
> > 
> 
> >    You might get better answers sooner in some appropriate
> 
> > forum.  Moreover, including some clues as to your OS (and its
> 
> > version) and other such info can be more helpful than
> 
> > expecting your readers to read your mind as well as your
> 
> > posting.
> 
> 
> 
> SSSU is the StorageWorks Storage System Scripting Utility 
> 
> <http://h10032.www1.hp.com/ctg/Manual/c00674636.pdf> for Command View 
> 
> EVA, using Cross Vraid Snapclones or Cross Vraid Snapshot capabilities. 
> 
>  (That may not be the most current version of that SSSU document.)
> 
> 
> 
> I don't trust block- and controller-level backup tools to provide a 
> 
> consistent copy of a running disk.  In my experience, the I/O 
> 
> controllers don't and inherently can't know enough about the I/O 
> 
> context and host caching and host transactions to be able to determine 
> 
> if the disks are in a consistent state, after all.  The first time I 
> 
> saw this problem was back in the 1980s with the faux shared-write 
> 
> clustering products that were briefly available prior to VAX/VMS V4.0.  
> 
> I've seen various subsequent attempts, too.
> 
> 
> 
> You might get lucky and split off the volumes at the "right" moment, or 
> 
> you might get part of a multi-part I/O transaction and not the rest.
> 
> 
> 
> Are you feeling lucky?
> 
> 
> 
> And yes, you can potentially improve your luck by figuring out how to 
> 
> quiesce your application I/O traffic prior to the split, or by using a 
> 
> database and its transactional capabilities.
> 
> 
> 
> I'd love to be wrong here, too.  Getting the host involved is always a 
> 
> mess, and some applications can tend to be uncooperative.
> 
> 
> 
> But I digress...
> 
> 
> 
> To the OP: it is probably best to call HP Support, and ask for their 
> 
> recommendation here.  With the pile of hardware and software gear you 
> 
> have here, you're paying for that support, so you might as well use it.
> 
> 
> 
> 
> 
> -- 
> 
> Pure Personal Opinion | HoffmanLabs LLC

thanks for your opinions, it is a vms system 8.3 1h1 an eva 6400 running cache and I freeze and thaw the databases. I'm not really sure that any of that matters as to my question but if it helps why not, yes I reached out to HP and lets just say the person was more concerned that my switches were not zoned than really answering this question outside of yes that works... I was hoping to find another site that was running SSSU and what they were using for a command.

thanks
Paul