can a hot-add based backup benefit from CBT on vmfs6 and vsphere6.5 considering the sesparse snapshots

[hussainbte]

I have tried to read about this but I could not find any doc from vmware explaining this in details.

my question is

can a hot-add based backup benefit from CBT on vmfs6 and vsphere6.5 considering the sesparse snapshots??

[Finikiez]

can you elaborate on this a bit more? which benefits do you expect to get?

I suppose that the only thing you can get is UNMAP and nothig more Snapshot Formats on VMFS

[hussainbte]

The benefits of using CBT.. where the image based backups will be faster.

I am not sure if sesparse snapshots will benefit from use of CBT.. I have read in some articles that hot-add based snapshots have become slower and also with vmfs6 the NBD is also SSL encrypted.

just wanted to have clear understanding before upgrade to 6.5

[Finikiez]

NBD is always slower for backup operations.

6.5 was released 11 months ago. I doubt that there could be significant difference in backup speeds on VMFS5 and VMFS6.

At least you can test this in your environment

[hussainbte]

Hi Finikiez,have

Thank you for the response.

I am little unclear about this sesparse based snapshots and how exactly they impact the backup performance.

specifically the hot-add based.

I am aware about the UNMAP benefits..

As we know most of the image based VM backup solutions benefit from Changed block tracking(CBT)  what impact would the change have on this ..?

[Finikiez]

AFAIK there is no difference between VMFS5 and VMFS6

CBT works the same way.