George,
see my reply to Robert, yes you can run multiple separate nsrjb commands,
and also check this out:
nsrjb -L -Y -S1-10 -S20-30 -S40-50 -S60-70 -f \\.\Tape0 -f \\.\Tape1 -f
\\.\Tape2 -f \\.\Tape3
I actually use this sometimes.
Regards
Andrew McGeorge
Senior Systems Specialist
Group Technology Operations
ASB Bank Limited
-----Original Message-----
From: George Sinclair [mailto:George.Sinclair AT noaa DOT gov]
Sent: 8 March 2003 11:59:AM
To: Legato NetWorker discussion; Andrew McGeorge
Subject: Re: [Networker] max parallelism for a jukebox
Out of curiosity, though, what if instead you just ran 4 separate nsrjb
processes, each specifying a different drive? I realize it's more work,
but would the max parallelism value need to be set to 4 to allow each
nsrjb to run at the same time, or does max parallelism only apply in the
case where you have one nsrjb process that hands the work to the various
devices like: nsrjb -EIv -S 1-4, for example?
George
Andrew McGeorge wrote:
>
> You may want to note, for general interest, that if you have jukebox
> parallelism set to 1 and issue the following command:
>
> nsrjb -L -Y S1-10 -f \\.\Tape0 -f \\.\Tape1 -f \\.\Tape2 -f \\.\Tape3
>
> All four drives will be used simultaneously for the labelling job.
>
> Regards
>
> Andrew McGeorge
> Senior Systems Specialist
> Group Technology Operations
> ASB Bank Limited
>
> -----Original Message-----
> From: Robert Maiello [mailto:robert.maiello AT MEDEC DOT COM]
> Sent: 8 March 2003 10:26:AM
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: Re: [Networker] max parallelism for a jukebox
>
> George,
>
> If you have 4 drives and you issue the command:
>
> nsrjb -Y -L -b 'my pool' -S 1-3
>
> it should label the tapes in parallel (with the Jukebox Max Parallelism
set
> to 3 as
> discussed in this thread). The one arm places tapes in the next drive
while
> Networker is labeling the first etc..
>
> It depends on your jukebox though and the features it supports. The
> BreeceHill Q47 I had would only use one drive when labeling. I'm not sure
> which jukebox feature it is that governs this though?
>
> Robert Maiello
> Thomson Healthcare
>
> On Fri, 7 Mar 2003 16:11:23 -0500, George Sinclair
> <George.Sinclair AT NOAA DOT GOV> wrote:
>
> >I'm a little confused, and I want to make sure I'm clear about this. You
> >said:
> >
> >"For instance if you set this value
> >> to 4 and kicked off one nsrjb operation all of the 4 tape drives
> >> would be used (if you were performing operations on 4 or more slots)."
> >
> >When I run an inventory operation, I have to indicate which device to
> >use regardless of whether I'm running in the window or the command line.
> >It shouldn't matter how many slots I'm inventorying. NetWorker will only
> >use the one device provided. It will never use the other devices unless
> >I run inventories there, too. I've never seen NetWorker use any device
> >other than the one you chose regardless of how many slots you're
> >inventorying and or what the value of t he max parallelism is. Didn't
> >you mean to say that all of the 4 tape drives would be used if you were
> >performing operations from 4 separate nsrjb processes, e.g. 4
> >simultaneous inventory operations?
> >
> >George
> >
> >Carston Locher wrote:
> >>
> >> Jim,
> >>
> >> I want to clarify things because from this statement I can
> >> see you have confusion and are being misdirected.
> >>
> >> The "jukebox max parallelism" has nothing to do with backup/recover.
> >> It only has to do with nsrjb and inventory/label. It is the
> >> number of devices nsrjb will use to perform these particular
> >> operations (backup/recover). The default setting by NetWorker
> >> is "# of drives -1 (in your case would be 3). This would allow
> >> inventory/label to use 3 devices and one would be left in reserve
> >> for backups/restores. You can change the value to 4 so all drives
> >> would be used if you like. There is no value in changing the
> >> max parallelism to be greater than the # of drives in your jukebox.
> >>
> >> Davina is actually slightly incorrect in that it is not the #
> >> of nsrjb processes allowed. For instance if you set this value
> >> to 4 and kicked off one nsrjb operation all of the 4 tape drives
> >> would be used (if you were performing operations on 4 or more slots).
> >>
> >> Please give me the name of your consultant. You don't have to
> >> send it to the group. I just want to make sure the person gets
> >> more education before they are allowed to talk to any more
> >> customers.
> >>
> >> Thanks,
> >>
> >> Carston
> >>
> >> -----Original Message-----
> >> From: Legato NetWorker discussion
> >> [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU]On Behalf Of Jim Lane
> >> Sent: Friday, March 07, 2003 5:35 AM
> >> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> >> Subject: [Networker] max parallelism for a jukebox
> >>
> >> I've just read a couple of posts on this from yesterday and I'm
> >> confused. the replies tended to suggest that this value should be
> >> related in some way to the number of drives in the jukebox that
> >> Networker should use for backup, as against leave free for ad hoc
usage,
> >> restores etc. I was told by the Legato consultant that this value is
the
> >> maximum number of saveset streams that can be directed to all the
drives
> >> in the jukebox at once. on that basis this number is supposed to be set
> >> at or above the sum of the "target sessions" for all the tape drives.
at
> >> least that's what I was told. on that theory the Legato guy set the
"max
> >> parallelism" in my 4-drive STK 9710 to 32. now I'm worried. who's right
> >> here? am I over-specifying this value?
> >>
> >> Jim Lane
> >> Sr. Technical Consultant
> >> Network Services
> >> Toronto Hydro
> >> office: (416)-542-2820
> >> cell: (416)-896-8576
> >>
> >> --
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