Ask the Expert

Implementing LAN-free backup

I don't have the budget for connecting my tape library to a SAN directly using SCSI/fibre router. Can I implement LAN-free backup if my backup server is on SAN and LAN as well? If the answer is yes, what are the benefits of connecting my storage library directly to my SAN for LAN free backup?

Requires Free Membership to View

If your storage array has the capability to do snapshots (for example BCV, ShadowImage, Clone, etc.) then the SAN connected backup server can connect to the snapshots and back them up on behalf of your application servers. You would need to alter your LUN security in the SAN to allow the backup server access to the snapshot LUNs. If you alter LUN security to dedicate some snapshot resources for access by both the application servers and the backup server, you can rotate the snapshots between application servers for each backup job. This may require some manual co-ordination on your part.

All backup streams will travel from the snapshot disks, through the backup server, to the Library connected to the backup server.

If the tape library is directly connected to the SAN, then it makes things a bit simpler. Using the shared storage options for your backup software, backup can be automated to allow each individual application server to share the SAN connected tape resource. The backup server simply co-ordinates the use of the library robotics, and the application servers themselves handle the backup streams to tape.

Therefore, the advantages of SAN connected shared tape resources are:

  • automation
  • the ability to move backup data over the SAN without the use of snapshots
  • remove the backup server as the sole data mover for backup streams

    Editor's note: Do you agree with this expert's response? If you have more to share, post it in one of our .bphAaR2qhqA^0@/searchstorage>discussion forums.


    This was first published in November 2003

  • There are Comments. Add yours.

     
    TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

    REGISTER or login:

    Forgot Password?
    By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
    Sort by: OldestNewest

    Forgot Password?

    No problem! Submit your e-mail address below. We'll send you an email containing your password.

    Your password has been sent to: