You make a very good point, Kelly.. that is, can a file that was backed up
while open be restored successfully?

It comes down to an issue of probabilities.. what are the chances that
backup will be restorable?  What are the chances it won't be?

What policy setting do most of you folks use, and why?


Daniel Swan
HP Unix Team
ISM-BC
3030 2nd Ave SE
Calgary, AB, T2A 5N7
ph. 403-530-1726
fax: 403-530-1066




> -----Original Message-----
> From: Kelly J. Lipp [SMTP:lipp AT storsol DOT com]
> Sent: Tuesday, August 15, 2000 10:39 AM
> To:   'Daniel Swan/TM'; adsm-l AT vm.marist DOT edu
> Subject:      RE: SHRDYNAMIC or SHRSTATIC?
>
> The question isn't can you back up an open file, it's can you restore it
> and
> have it useful?  You must check.  The problem with backing up open files
> is
> you can move a lot of useless data.  If you can't restore it, you might as
> well not back it up.
>
> Kelly J. Lipp
> Storage Solutions Specialists, Inc.
> PO Box 51313
> Colorado Springs CO 80949-1313
> (719) 531-5926
> Fax: (719) 260-5991
> Email: lipp AT storsol DOT com
> www.storsol.com
> www.storserver.com
>
>
> -----Original Message-----
> From: Daniel Swan/TM [mailto:Daniel.Swan AT telus DOT com]
> Sent: Tuesday, August 15, 2000 9:31 AM
> To: 'lipp AT storsol DOT com'; ADSM-L AT VM.MARIST DOT EDU
> Subject: RE: SHRDYNAMIC or SHRSTATIC?
>
>
> IS there any reason not to use Dynamic?  Is there a reason NOT to back up
> open files?
>
>
>
> Daniel Swan
> HP Unix Team
> ISM-BC
> 3030 2nd Ave SE
> Calgary, AB, T2A 5N7
> ph. 403-530-1726
> fax: 403-530-1066
>
>
>
>
> > -----Original Message-----
> > From:       Kelly J. Lipp [SMTP:lipp AT STORSOL DOT COM]
> > Sent:       Monday, August 14, 2000 7:47 PM
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Subject:    Re: SHRDYNAMIC or SHRSTATIC?
> >
> > I think if you're going to use SHRDYNAMIC you might as well use DYNAMIC.
> > How many files actually close within a few seconds?  I've seen many
> > instances where a large file will be attempted three times
> > (CHANGINGRETRIES - 1, usually) and then be backed up on the fourth try.
> > This means we move a bunch more data than we need to trying something
> that
> > isn't going to change anyway.  If you can get a usable copy of an open
> > file,
> > back it up while open the first time.
> >
> > Kelly J. Lipp
> > Storage Solutions Specialists, Inc.
> > PO Box 51313
> > Colorado Springs CO 80949-1313
> > (719) 531-5926
> > Fax: (719) 260-5991
> > Email: lipp AT storsol DOT com
> > www.storsol.com
> > www.storserver.com
> >
> >
> > -----Original Message-----
> > From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf 
> > Of
> > Daniel Swan/TM
> > Sent: Monday, August 14, 2000 3:59 PM
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Subject: SHRDYNAMIC or SHRSTATIC?
> >
> >
> > I am presently reviewing our backup policies, and I see that we are
> using
> > SHRSTATIC, but it seems to me it
> > would make more sense to use SHRDYNAMIC, which eventually forces the
> > backup
> > of open files.
> >
> > Is there a reason not to use SHRDYNAMIC?
> >
> > Best regards,
> > Dan.