Backup Data flow in VMWare using the Hotadd transport mode for data transfer; Does it transfer data directly from ESxi server or VSA to library through MA?
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VMWare VSA Backups data flow
+3- Apprentice
Best answer by Jacek Piechucki
The flow looks like this:
Snapshot of the backed up VM is being created, the R/O locked base vmdk file is then attached to the VSA proxy. VSA proxy is reading the block data from the attached vmdk (with CBT or w.o CBT depending on the configuration). Metadata and data under the backup is then sent to Media Agent saving the data to the library.
No “additional” space is needed anywhere apart from the space used by VM snapshot.
- Vaulter
Hotadd is adding the disks to the virtual VSA proxy. At this pint hotadd feature ends. The rest is related to the configuration of the library, meaning if the VSA proxy is also the Media Agent having R/W access to the library.
+3- Apprentice
Thank you Jacek for your quick response, We are deploying the one VSA & 2 MA servers in my environment, Can you please elaborate the data & meta data flow from ESxi to backup storage. Means is it from individual VM’s or ESXi hosts.
+3- Apprentice
Hotadd is adding the disks to the virtual VSA proxy. At this pint hotadd feature ends. The rest is related to the configuration of the library, meaning if the VSA proxy is also the Media Agent having R/W access to the library.
Hotadd is adding the disks to the virtual VSA proxy. At this pint hotadd feature ends. The rest is related to the configuration of the library, meaning if the VSA proxy is also the Media Agent having R/W access to the library.
And for adding the disks to VSA proxy requires more space?
+3- Apprentice
VMFS-5 uses a consistent file block size and can handle volumes up to about 60TB, how can we allocate the VMFS-5 feature to perform the backup?
- Vaulter
- Answer
The flow looks like this:
Snapshot of the backed up VM is being created, the R/O locked base vmdk file is then attached to the VSA proxy. VSA proxy is reading the block data from the attached vmdk (with CBT or w.o CBT depending on the configuration). Metadata and data under the backup is then sent to Media Agent saving the data to the library.
No “additional” space is needed anywhere apart from the space used by VM snapshot.
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