Cifs mounted Datastore: Do or dont?

[fuzzyduck]

Obviously the answer is NO, but what can i expect?

Say i have this:
1. PBS installed as VM in PVE
2. Cifs mount inside PBS to other (non PVE) machine with disks attached
3. Backup PBS seperately to non-PBS location
4. Backup the rest of VM&CT to PBS

When PVE dies, and it takes PBS with it can i restore everything doing like:
1. install PVE
2. install PBS from that single regular backup
3. Mount the cifs again
4. restore all VM&CT? or is the connection PBS--->Chunks lost?

 

[Dunuin]

Obviously the answer is NO, but what can i expect?

Say i have this:
1. PBS installed as VM in PVE
2. Cifs mount inside PBS to other (non PVE) machine with disks attached
3. Backup PBS seperately to non-PBS location
4. Backup the rest of VM&CT to PBS

When PVE dies, and it takes PBS with it can i restore everything doing like:
1. install PVE
2. install PBS from that single regular backup
3. Mount the cifs again
4. restore all VM&CT? or is the connection PBS--->Chunks lost?

Yes, that will work. But I would atleast use NFS instead of SMB. But don't expect great performance. PBS is only designed to run on local SSDs. With NFS on HDDs even a GC of 0.5TB chunks will run for over an hour using a 10Gbit NIC. Verify tasks possibly even longer.

 

[fuzzyduck]

Is it worth the hassle of setting up this config? I have a simple vzdump task running nightly now. Does it copy/write less each backup with PBS? Or does it copy everything and does the dedup on? I have the spare room so i dont mind non-dedup

 

[Dunuin]

Does it copy/write less each backup with PBS?

Yes, but only for VMs not LXCs and only if you don't shutdown your VMs/host (which means "stop" mode backups won't work neighter).

I have the spare room so i dont mind non-dedup

Dedup is great. That way you don't need snapshots anymore.

 

[fuzzyduck]

Think ill stick to the old method. Else its just an extra layer of complexity in my simple homelab.

 

[hvisage]

2. Cifs mount inside PBS to other (non PVE) machine with disks attached

I'd test that portion, as PBS relies on a POSIX with last access time for "touching" chunks to check which chunks can be "expired"

Rather setup a 2nd off provider/site with sync jobs pulling the backups for 2nd *copy*