03-18-2009 11:39 AM
Hello,
Let me first tell you the intended goal of what we hope to obtain. We would like all of our daily jobs to write to one drive. With this, we hope to minimalize tape usage. As it stands, we use 18 tapes per week for daily jobs (which are sent off-site for three months), so this really adds up really quickly.
To back files up, we have a TS3310 with six tape drives. All of the drives are hcart3 density.
Currently, we have around twenty policies. As all of these policies kick off at midnight, they're put into the activity monitor and they start writing to tapes. Problem is, the daily jobs write to all six tape drives (thus, using six tapes). When we're sending six tapes off-site per day...and 18 per week...you can see how this really adds up. We believe by telling all of our daily policies to backup to one, and only one drive, we can use the full amount of each single tape before moving on to a second tape.
I spoke with NetBackup/Symantec today, and they informed me what we want to do is impossible. They let us know we would have to change the density, thus deleting all of our daily tapes right now. I have a really hard time believing that NetBackup is not intelligent enough to accomplish this.
We figured out how to get all of one policiy to write to one tape drive, but we cannot figure out how to get all twenty policies to write to the same drive (outside of downing the other drives).
Does anyone have experience with this, or can provide a little guidance
Solved! Go to Solution.
03-18-2009 11:53 AM
This can be done with storage unit definition and multiplexing
Create a new storage unit with max concurrent drives set to 1 and multiplexing to 18
in each policy:
override the storage unit for the daily schedule to use the new storage unit.
Set media multiplexing to 18 in the daily schedule
03-18-2009 11:53 AM
This can be done with storage unit definition and multiplexing
Create a new storage unit with max concurrent drives set to 1 and multiplexing to 18
in each policy:
override the storage unit for the daily schedule to use the new storage unit.
Set media multiplexing to 18 in the daily schedule
03-18-2009 12:02 PM
Also, with 6.5, you could change the volume pool to have only 1 "partially full media".
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Darren
03-18-2009 12:06 PM
Thank you both for the responses.
Stumpr, that is what we tried to figure out and it turns out it did not work. The problem is when you have two different policies, if they kick off at the same time they use different drives. I might be doing something wrong...I'll look into this more.
'
Darren, I did not know that. This could be the solution I have not seen/tried. I just enabled it...and we'll see how it goes.
Thanks again y'all
03-18-2009 12:28 PM
Stumpr's suggestion should work across policies, but all the policies have to use the same storage tape unit. If you have multiple drives being used by a STU set to 1 drive, then something is wrong.
If you're using different STUs, then it won't work.
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Darren
03-18-2009 03:13 PM
A storage unti with just 1 drive in it should work as Stumpr said.
Verify that all policies use the same storage unit.
But the limit usage should also work.
03-23-2009 04:54 AM
With a staging area, you may send all backups there and then de-staging it all using one single stream.
hope it helps
03-23-2009 08:02 AM
03-23-2009 10:28 AM
03-23-2009 10:56 AM