Solved: VMWare Data Store Considerations

Abhijit_Srivast · ‎08-13-2014

I want to understand that what percentage of DataStore Volume shall i keep reserve for VADP backups . VMWare with Symantec Netbackup 7.5.0.6 .

Any other inputs to configure the VMware backups are highly solicited .

Regards ,

Abhijit Srivastava .

RamNagalla · ‎08-13-2014

Hello,

I would say always make sure that that Data store has the 10% free space to run the Vmware backups.

Vmbackups do run even its less than 10 % free space, but it may cause Data store running out of space..(depends on the data storage and VM size)

so its always best practive to keep minimum 10 % free space in data stores.

have a look into the below blog for understanding the Vmware backups in netbackup

https://www-secure.symantec.com/connect/blogs/nuts-and-bolts-netbackup-vmware

View solution in original post

Walker_Yang1 · ‎08-13-2014

Hello,

My co-worker told me the following link for your reference. The key is about how the VMware works, not about netbackup itself.

As mentioned before, it depends on several parameters. Once is certainly snapshotting as you already mentioned, another important one is whether the VMs are thin provisioned and the datastore is over-provisioned. The amount of free disk space also depends on disk write activity of the VMs while there are active snapshots. As a rule of thumb you should keep 15-20% free disk space for datastores with either thin provisioned virtual disks or snapshots. The percentage however may vary depending on the size of the datastore.

https://communities.vmware.com/thread/454261

Thanks

View solution in original post

Marianne · ‎08-13-2014

VADP backups only requires a VMware snapshot of the virtual machines.

It is therefore a VMware question, not NetBackup.

See these vmware articles:

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=102527...

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=100375...

Handy NetBackup Links

RamNagalla · ‎08-13-2014

Hello,

I would say always make sure that that Data store has the 10% free space to run the Vmware backups.

Vmbackups do run even its less than 10 % free space, but it may cause Data store running out of space..(depends on the data storage and VM size)

so its always best practive to keep minimum 10 % free space in data stores.

have a look into the below blog for understanding the Vmware backups in netbackup

https://www-secure.symantec.com/connect/blogs/nuts-and-bolts-netbackup-vmware

Walker_Yang1 · ‎08-13-2014

Hello,

My co-worker told me the following link for your reference. The key is about how the VMware works, not about netbackup itself.

As mentioned before, it depends on several parameters. Once is certainly snapshotting as you already mentioned, another important one is whether the VMs are thin provisioned and the datastore is over-provisioned. The amount of free disk space also depends on disk write activity of the VMs while there are active snapshots. As a rule of thumb you should keep 15-20% free disk space for datastores with either thin provisioned virtual disks or snapshots. The percentage however may vary depending on the size of the datastore.

https://communities.vmware.com/thread/454261

Thanks

Abhijit_Srivast · ‎10-17-2014

Here are few recommendation that rolled out from one of my colleagues :

2TB LUN 25percent reserve capacity on DS
4TB LUN 15percent reserve capacity on DS
8TB LUN 10percent reserve capacity on DS

Most recommended LUN capacity also confirmed to be least 4TB

VOX

VMWare Data Store Considerations