SR space occupied by backup snapshots

[manilx]

@Gheppy OK..... Weird.
What's the advantage/disadvantge of LVM vs ETX4 and vice versa then?

[Gheppy]

@manilx
I chose ext4, precisely so as not to waste unnecessary space

[manilx]

@Gheppy OK. Thx.

[olivierlambert]

It's not 4x200GiB, even in thick provisioned storage. The size you side is the total disk size, not the space used.

[manilx]

@olivierlambert Sorry but I don't understand this. Call me stupid....

In the first screenshot of the disks in the SR:
I have the disk + 2 snapshots of the same size as the disk. So I understand the space used is not 3x disk size? What is it then?

I'm asking this all because after 2 running backups I'm running out of disk space.
These are the SR's:

If I need to reformat in ext4 we have to redo this.
Going forward we are migrating our 2 main big hosts from vmware and I need to understand this before as once formatted it is a PITA to reformat when there are vm's.

Really appreciate your clarification on this as it is very different from esx.

[manilx]

@manilx
E.g. This is the space used by one disk... It's using 500+ GB (it's a 300GB VM disk)

[olivierlambert]

There's a different between the space allocated and the space used.

If you are doing a migration from VMware without spending any time to learn, maybe you need professional service to be assisted?

[manilx]

@olivierlambert We are being assisted by professional services but they are also new to xcp-ng.

I'm ready to learn!! Everyone had a start....

[manilx]

@manilx P.S: This is why we only migrated a small instance.... To learn!

[olivierlambert]

You are assisted by whom? We did not yet opened our certification program (but it should be a matter of few months)

[manilx]

@olivierlambert Here in Portugal: Securnet

But I'd appreciate it a lot if you could clarify this for me.

[manilx]

@manilx We're a 15year vmware client..... Still with 2 years of contract. But still wanting to migrate to you.

[olivierlambert]

And I'm happy you are doing this ! Let me check about your partner for the integration (I want to be sure you are working with skilled people)

[manilx]

@olivierlambert They are! But new to xcp-ng.

[olivierlambert]

Okay let's continue by private chat on the partner thing.