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NDMP full and then differential ?

I know the NDMP backups have been changed a lot in terms what can or cannot do. Years ago, I understand NDMP can do full backup and then differential (back up changes from last full). Upon this, we will have periodically do full backup.

Can NDMP backup support incremental backup today, or still the same?

Second question, if I wanted to check what is the value of "hladdress" defined for the NAS IP, how do I do that?



ADSM.ORG Moderator
3rd question:
Is NDMP backup is based on SnapShots on the storage array?
Spectrum Protect has very archaic NDMP support. You need to be able to take advantage of Change File Tracking on the NAS system, and IBM doesn't seem to be able to get it done. Change file tracking allows your backup process to bypass the onerous tree-walk, and just capture the files you came for.

This was a key decision point for moving to Commvault for my firm.
Your answer seems what I am looking for.
So, TSM NDMP backup is not using SnapShots technology, and just stream like backup? I am a little confused by it.
based on my understanding, it will do full backup, and then several differentials, and then full again...
Every time when I do either full or differential, I will have to tree-walk? Even with TOC option?


ADSM.ORG Moderator


ADSM.ORG Moderator
I used SnapMirror to tape in days of yore. It worked pretty well...but since there's no tape here....

We never actually had SnapDiff at my shop (it was an additional fee that we were unwilling to pay). I don't see that any additional servers are required, no. But I'm sure someone will chime in if I'm full of it! :D

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The Spectrum Protect TLA (Three-Letter Acronym): ISP or something else?

  • Every product needs a TLA, Let's call it ISP (IBM Spectrum Protect).

    Votes: 18 18.6%
  • Keep using TSM for Spectrum Protect.

    Votes: 59 60.8%
  • Let's be formal and just say Spectrum Protect

    Votes: 12 12.4%
  • Other (please comement)

    Votes: 8 8.2%

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