Bob,
This is true.  In fact, I seem to remember Dwight Cook relating an
incident where one of his files slipped through the crack between the
disk cache and the tape pool.  Care to refresh our memory, Dwight?

Ron Clendenny
Callaway Nuclear Plant
Fulton, Missouri
<rdclendenny AT cal.ue DOT com>

> -----Original Message-----
> From: David Ong [SMTP:david AT BABYONG.NSC DOT COM]
> Sent: Wednesday, June 11, 1997 5:17 PM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Re: "backup stgpool" command
>
> Ron,
> This is true if one only does 'backup stgp' for tape pools. However,
> it is
> perfectly valid to backup a disk storage pool first and then the tape
> pool
> to conceivably cut down on the number of tape mounts.
>
> At 04:16 PM 6/11/97 -0500, you wrote:
> >Bob,
> >Typically, a tape pool is the type of pool that gets copied by
> 'backup
> >stgpool'.  If a node is being backed up, the data is probably going
> to
> >the disk pool, so, no, the files would not even be considered for
> >copying.  This is not a problem though.  Think of 'backup stgpool' as
> an
> >ongoing process.  Tomorrow, after the files migrate to the tape pool,
> >they WILL be copied. And even if some files were in-flight to the
> tape
> >pool being backed up and (due to internal logic) they were not copied
> -
> >rest assured they would be at the next 'backup stgpool'.
> >
> >Ron Clendenny
> >Callaway Nuclear Plant
> >Fulton, Missouri
> ><rdclendenny AT cal.ue DOT com>
> >
> >> -----Original Message-----
> >> From: Siska, Bob [SMTP:BSISKA AT NCS DOT COM]
> >> Sent: Wednesday, June 11, 1997 4:45 PM
> >> To:   ADSM-L AT VM.MARIST DOT EDU
> >> Subject:      "backup stgpool" command
> >>
> >> How does the "backup stgpool" command work internally? In what
> >> sequence does
> >> it select data for copying? Will it include client backups that are
> >> done
> >> while the "backup stgpool" is running?
> >> For example, if FileA from Node1 has already been copied, and Node1
> >> backs up
> >> FileA again while the "backup stgpool" is still running, is FileA
> >> copied
> >> again (the newer version)?
> >> Is it any problem if nodes are backed up while the "backup stgpool"
> is
> >> running? It seems to me that the major problem would be if the
> "backup
> >> stgpool" finished while a node was being backed up.
> >> What do you folks think?
> >>
> >> Bob Siska
> >> National Computer Systems
> >> Iowa City IA
> >> Bob_Siska AT ncs DOT com
> >>  ----------
> >
> >
>
> Have a nice day or whatever's left of it.
>
> David Ong
> National Semiconductor Corp.