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2724
May 1st, 2018 20:00
Clone to Tape
is it possible to write more than of one Tape Drive at the same time. From only one Clone Workflow?
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14 Posts
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2724
is it possible to write more than of one Tape Drive at the same time. From only one Clone Workflow?
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bingo.1
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May 2nd, 2018 11:00
Just for curiosity I have setup such a scenario a while ago.
This is what I did:
- Defined a workflow with
1 backup action
2 clone actions
For both I specified
- previous action: 'backup'
- concurrent: yes
I cloned to the same pool (disks)
However, If you have a specific workflow that only runs clone actions, this will not be possible as the 'previous' action can only be a clone.
TheRapac
14 Posts
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May 2nd, 2018 12:00
i clone the save sets from the last 24 hours.
TheRapac
14 Posts
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May 2nd, 2018 12:00
because, the clone to tape action during more than 24 hours and i want every 24 hours a backup action. But when the clone action is still working, the workflow does not started.
crazyrov
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4 Operator
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1.3K Posts
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May 4th, 2018 02:00
@TheRapac
unfortunately the only way to achieve this is to use multiple clone actions.
muetzd
18 Posts
1
May 6th, 2018 19:00
Read Once, Write Many
"You cannot use the NetWorker software to create an instant clone by writing to two devices simultaneously. This operation is also referred to as parallel cloning, twinning, or inline copy. Where parallel cloning or twinning is required, consider using the NetWorker cloning feature." (from the Administration Guide for NetWorker.
There is an RFE for this NW-I-123, documented in KA 485251 -- "NetWorker: Support for Inline Cloning (also know as (aka) instant clone, parallel cloning, twinning, or inline copy)"
bingo.1
2.4K Posts
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May 7th, 2018 01:00
You need to be very careful when reading the whole paragraph "Benefits of cloning and staging" in the Admin Guide.
The tricky marketing term here is "instant cloning".
It obviously refers to the creation of a backup and a clone save set at the same time. This is not possible. The reason is clearly stated in the Admin Guide a litle bit earlier:
"NetWorker can only perform a clone operation after a successful backup, which provides the following benefits: ..."
And there is a bunch of reasons listed.
Technically, I see at least 2 good reasons why it is not possible:
- Currently, it is not possible to run 1 save process and write to mor than 1 pool
- The sync might become an issue, especially a fast backup device but a slow clone device.
It is obvious that the slow device will determine the overall speed which of course slows down the backup.
So please read the Admin Guide - it explains it also pretty well.
However, once you have the backup save set, you can run multiple clone operations at the same time - even to the same pool - if you just have multiple devices.