Networker

Re: [Networker] cloning to multiple tapes?

2003-01-23 16:55:23
Subject: Re: [Networker] cloning to multiple tapes?
From: "Thomas, Calvin" <calvin.thomas AT NACALOGISTICS DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Thu, 23 Jan 2003 13:55:16 -0800
I don't see why not. I only have one tape drive (in a jukebox) but if you
have 2 tape drives each with a tape from a clone pool, it should work. I
know you can clone from tape 1 to tape 2 and from tape 3 to tape 4
simultaneously.  As I said the only question in my mind is this:  If you try
to clone from file device1 to tape 1, and from file device1 to tape 2
simultaneously, will the first clone session from the file device lock it so
the second clone session is blocked from reading from the same file device?

Calvin Thomas



-----Original Message-----
From: roger midway [mailto:rogermidway AT YAHOO DOT COM]
Sent: Thursday, January 23, 2003 1:13 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] cloning to multiple tapes?


Can you clone savesets to the same CLONE pool on
different drives.  Meaning- I have the nsr server and
storage node.  Can I spin a clone session (using
scripts) using 2 drives on each to volumes from the
same pool?

RM


--- "Thomas, Calvin" <calvin.thomas AT NACALOGISTICS DOT COM>
wrote:
> The options will only work if networker can
> physically support the cloneing
> to multiple tape drives.
>
> If you have multiple file devices, you could set up
> one clone for each tape
> drive, and triple your clone speed.
>
> If you have a single file device, Try this
> experiment:
> start a clone session with one ssid. After it is
> saveing to tape, start
> another clone session with another ssid, and see if
> it can get access to the
> file device.  If you can pull multiple save sets at
> once, you are in luck.
> Otherwise, you will have to change to multiple file
> devices to clone from.
>
> I'll be interested in the results...
>
> Note: I have been working on several scripts to
> stage (or clone) from disk
> to tape.  I have one that works pretty good now.  It
> finds all save sets on
> the hard drive that are over a certain age, and
> complete, and saves them to
> tape one at a time. It also pauses in between each
> save, and allows backups
> to take over the file device. After the backup is
> finished, it continues
> with the next save in the list.  The only real
> difference between cloneing
> and stageing is staging can be done to any pool (not
> just clone pools) and
> after the stageing is done the save set is deleted
> off of the hard drive.
> For cloneing, I just use the automatic group
> cloneing in networker.
>
> Calvin Thomas
> UNIX System Administrator
> NACA Logistics
>
>
>
>
>
>
>
> -----Original Message-----
> From: Robert L. Harris
> [mailto:Robert.L.Harris AT RDLG DOT NET]
> Sent: Thursday, January 23, 2003 7:33 AM
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: [Networker] cloning to multiple tapes?
>
>
> Setup:
>   Backups run to local file devices,  kept there for
> 2 weeks then
>     cleaned off
>   We clone Fulls to tape daily with a very simple
> script that uses
>     nsrclone and a list of SSID's
>   We have 3 DLT drives
>
> Is there a way to tell legato to use multiple tapes
> for cloning?
> There's no -dev flag I can find or such.  It's
> taking considerable time
> to run the clones and some days will eat into
> regular backup time.  If I
> could tell it to run to use 2 or even 3 drives for
> cloning at one time
> it'd be a Good Thing (TM)...
>
> Thoughts?
>   Robert
>
>
>
> :wq!
>
---------------------------------------------------------------------------
> Robert L. Harris                     | PGP Key ID:
> FC96D405
>
> DISCLAIMER:
>       These are MY OPINIONS ALONE.  I speak for
> no-one else.
> FYI:
>  perl -e 'print
>
$i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'
>
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