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How to Seed a baseline Full backup (Synthetic Backups)

Created: 02 Jul 2011 | 4 comments
Tim 105's picture

I am implementing BE2010 R3, into a site with the following environment:

Head Office: 1 x Media Server with Data Deduplication and Adv Disk-Based Backup Option (to allow Synthetic Backups)

3 x Remote Sites with very small WAN links - Media Server installed at each location.

I have tested synthetic backup Using a DeDup folder and a Backup-to-Disk Folder for a test backup of one of the remote sites. (e.g 1 folder,3 files).  Baseline backup to Dedup folder, Incrementals to B2D folder, Synthetic into Dedup.  This ran sucessfully.

However due to the nature of the small wan links, I will not be able to transfer the whole server data (approx 300 GB) over the wire as a full Baseline Backup.

Therefore at the Remote Site, I was looking at creating a full backup to local storage and then duplicating that to a USB external Hard Drive and sending that USB Drive to the Head Office so that I can import that backed up data into the Head Office Media Server Dedup folder to be used as the Baseline backup for Synthetic Policy.  After that is done, I would run Incremental Jobs across the Wire, with the Synthetics occuring on a regular basis.

Currently this site has been using CommVault 8 and historically, the remote sites can add 10-50GB of data in a day, so Incremental Jobs have been failing when this occurs.  When this happens, a Full backup is created locally (Using CommVault) at the remote site, and this is shipped to Head Office and copied into the Head Office CommVault Media Server, which is then used as the new Baseline Backup.

  1. Is this possible to do with BE2010 R3 (for Initial Baseline Seeding) and
  2. If Incremental jobs fail (due to large amounts of changed data), can a new Full backup be done locally and exported to USB drive to be shipped to Head office, to be used as a new Baseline backup.

If it is possible can someone indicate the steps on how to do this.

 

 

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pkh's picture

 

Since you are using dedup, why don't you just use dedup all the way and forget about synthetic backup.  Install dedup on your remote media servers.  Once the data is dedup'ed locally, use optimised dedup to duplicate dedup'ed data over to the head office.

With dedup, once you have done your first full backup, any subsequent full backup is like an incremental backup.  Only the changed blocks are stored.

Tim 105's picture

From a costing point of view, our client didnt want to pay for 3 x Dedup options for the remote servers.

dedupe-works's picture

Don't use ADBO and Dedupe. There is no benefit when using the two together.

Regards.

Randey

dedupe-works's picture

So, for my real answer, please review the following tech note.

http://www.symantec.com/business/support/index?pag...

This doc includeds seeding proceedure.

 

For this portion -

Currently this site has been using CommVault 8 and historically, the remote sites can add 10-50GB of data in a day, so Incremental Jobs have been failing when this occurs.  When this happens, a Full backup is created locally (Using CommVault) at the remote site, and this is shipped to Head Office and copied into the Head Office CommVault Media Server, which is then used as the new Baseline Backup.

  1. Is this possible to do with BE2010 R3 (for Initial Baseline Seeding) and
  2. If Incremental jobs fail (due to large amounts of changed data), can a new Full backup be done locally and exported to USB drive to be shipped to Head office, to be used as a new Baseline backup.

If it is possible can someone indicate the steps on how to do this.

If ADBO is required, which its not, then you would simply run a the incremental again. The "new baseline" will occur when your Synthetic job template runs. But again, ADBO and dedupe is not suggested.

Regards.

Randey