When you expire all of the images on a tape (virtual or otherwise) you have
to follow it up with this command:
bpexpdate -deassignempty
This will then set the status of the tape(s) to Available.
A useful tip for expiring images is to look at the output from bpimagelist
-l
If you look at: http://support.veritas.com/docs/193085
It will give a full description of the rather messy outpuf from this
command. Anyway, I put together an awk snippet to get just the information
out that I needed:
bpimagelist -l -hoursago 999 | awk '($1 == "IMAGE"){print $6, "Primary:
"$28, "Copies: "$21,"Frags: "$22, "KB: "$19, $7, $11, $14}'
Now you can use this output to look for whatever you want based upon the
following
Primary: 1 Copies: 1 -- an image that has not yet been dup'd
Primary: 1 Copies: 2 -- an image that has been dup'd, but the
primary image is still copy 1
Primary: 2 Copies: 2 -- an image that has been dup'd with the
primary image as copy 2
Primary: 2 Copies: 1 -- an image that has been dup'd, primary image
is copy 2, & copy 1 has been expired
there are other variations on this, but you get the idea
I look for something like "Primary: 2 Copies: 2" and then use the backupid
(first field of my awk output) to expire copy 1 like this:
bpexpdate -backupid <backupid> -d 0 -copy 1 -force
The "-copy 1" part is important....if you leave this out it will expire all
of the images....probably not a good idea.
The last column in the awk output is the timestamp which may be useful if
you decide that you want to leave the copy 1 image around for a set amount
of time. (Remember this can be converted to human-readable format by using
the command: bpdbm -ctime <timestamp> ).
--stuart
_________________________
Stuart W. Liddle
Amgen Corp.
liddles at amgen.com
-----Original Message-----
From: smpt [mailto:smpt at peppas.gr]
Sent: Saturday, July 29, 2006 1:04 AM
To: Liddle, Stuart; WEAVER, Simon; 'Mansell, Richard';
veritas-bu at mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] Multiplexing
Can you share your script?
I'm using the same technique but there is a problem with tape expiration.
When you expire all images of one tape the tape doesn't expire.
You have to search for assigned tapes that they don't have media and then
you have to use the bpexpdate - jusmedia command to expire the tape.
smpt
> -------Original Message-------
> From: Liddle, Stuart <liddles at amgen.com>
> Subject: Re: [Veritas-bu] Multiplexing
> Sent: 28 Jul '06 20:36
>
> That's good for backup speeds, but it sucks for restores.??Unless all
> of your clients have really slow network connections, having a high
> multiplexing value is not really a good idea.
>
> You might want to consider dropping the multiplexing down to
> something like 6.
>
> Our configuration uses VTL's to our first backup copy and then I use
> vault to put it to physical tape.??I multiplex to the VTL and
> single-stream to the physical tapes.??Once it is on the physical
> tape, we have a script that will bpexpdate the copy 1 image on the
> VTL (this is not an automatic option in NetBackup until version 6.x).
>
> When you do a restore from a physical tape, you have a single-stream
> copy and not one that is multiplexed....this makes for a faster restore.
>
> --stuart
>
> -----Original Message-----
> From: veritas-bu-bounces at mailman.eng.auburn.edu
> [mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of
> WEAVER, Simon
> Sent: Thursday, July 27, 2006 11:22 PM
> To: 'Mansell, Richard'; veritas-bu at mailman.eng.auburn.edu
> Subject: Re: [Veritas-bu] Multiplexing
>
>
> Richard
> Yes I use multiplexing a lot
>
> NBU 5.1 Master MP2 + 2 SAN Media Servers
>
> 4 drives in a robot - using SSO
>
> 1 Storage Unit set to multiplex 25 jobs per drive (Master)
> 2 SAN Storage Units set to use 2 drives, multiplex 8 per drive
>
> Seems to work - get a lot of jobs done - around 300 per night if that
helps.
>
> Regards
>
> Simon Weaver
> 3rd Line Technical Support
> Windows Domain Administrator
>
> EADS Astrium Limited, B23AA IM (DCS)
> Anchorage Road, Portsmouth, PO3 5PU
>
> Email: Simon.Weaver at Astrium-eads.net
>
>
>
> -----Original Message-----
> From: Mansell, Richard [mailto:Richard.Mansell at ccc.govt.nz]
> Sent: 27 July 2006 22:31
> To: veritas-bu at mailman.eng.auburn.edu
> Subject: [Veritas-bu] Multiplexing
>
>
>
> We are struggling to get all of the backups run during the backup
> window and one of the obvious solutions is to start using
> multiplexing as the tape drives are not being driven at any where near
their maximum throughput.
> There has been a rather nasty multiplexing problem fixed in 6.0 MP3
> but I would be interested to do a straw poll of how many people are
> using multiplexing and if possible any issues encountered.
>
> I would appreciate it if you would respond (off list) as to whether
> you use multiplexing or not (any version of NetBackup). I will
> summarise the results and post back to the list.
>
> Regards
>
> Richard
>
>
>
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