Hi all. I've recently set something like this up. We have 4 ultrium tape
drives. What I found however, was that if I just ran the clones normally
(using the clone group function), what would happen is a clone would start
in jukebox1 using both drives (one for teh backup tape and one for the
clone tape) and then networker would try to start another clone using a
tape from teh same jukebox and have to wait for the first one to finish.
What I ended up doing (using a script) was to change one drive from each
juke box to only be accessable by clones and the other drive only to be
accessable by all of our backup pools. Then I create a list of save sets.
then, I extract a list of saveset IDs that were done the previous night for
each jukebox into two seperate files. Then issue the nsrclone command
forked off to teh background for each jukebox. I then have two clone
sessions running at once.
I do have 4 drives though , not three
Brendan
calvin.thomas AT NACALOGISTICS DOT [email protected] on 24/01/2003
08:55:16
AM
Please respond to NETWORKER AT LISTMAIL.TEMPLE DOT EDU; Please respond to
calvin.thomas AT NACALOGISTICS DOT COM
Sent by: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
cc:
Subject: Re: [Networker] cloning to multiple tapes?
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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