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Backup method for Big vmware infrastructures


What is the backup method used for the large vmware infrastructure, more than 1000vm? nbd? hottadd

I think the ndb is not fast and not suitable for large vm


ADSM.ORG Senior Member
I've been backing up about 850 vm's with hotadd from 5 datamovers, dedup/compression enabled.
From IBM's doc https://www.ibm.com/support/knowledgecenter/SSEQVQ_8.1.4/client/r_opt_vmmaxparallel.html
"Adjust the values of vmmaxparallel, vmlimitperhost, and vmlimitperdatastore to find the values that provide optimal performance for parallel backups, in your environment. "
the datamover opt file has:
VMMAXParallel 8
VMMaxVirtualDisks 8
vmlimitperhost 8

This is using TDP4VE 8.1.1, on vmware 6.5.
When I upgraded the DM's to, the vm team upgraded to 6.5 u2 and due to a bug in VDDK 6.5 u2 ( I think its in 6.5 u2, and 6.7) I had to change everything from hotadd to nbd. And yes....there's a performance hit. With NBD, I've had to adjust the above to keep in mind NFC limits within vSphere.
In VDDK 6.7 u1 the fix is in that should allow one to switch back to hotadd. Just there isn't a released upgrade path to 6.7 u1 yet. Just announced, but not GA.
https://www-01.ibm.com/support/docview.wss?uid=swg1IT25208 for the above hotadd issue.

I've yet to try out Spectrum Protect Plus.

Hope it helps.


I am disappointed with tsm, vmware limit to 20% of the bandwidth with nbd.my problem with nbd is that I have many vm with 300go / day of Delta ,it is very complicated. With hotadd I go 6 times faster but I do not know if it works with parallelism and I have plenty of persistent independent disk .... You know that it method used spectrum protect plus?


ADSM.ORG Moderator
If you are writing backup directly to a block device, then SPP might work for you.

We POC SPP to write to a Data Domain and the results was far from advertised. The initial code had issues on running inventories when other ESXi clusters are remote - initial inventory took days!

Newer code should have solved this.

Also, using SPP will be a total mind shift as you really do not need TSM (Spectrum Protect) to do your backups and restores.

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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: 10 16.7%
  • Keep using TSM for Spectrum Protect.

    Votes: 35 58.3%
  • Let's be formal and just say Spectrum Protect

    Votes: 9 15.0%
  • Other (please comement)

    Votes: 6 10.0%

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