Questions about thin pool in Proxmox 4.2

[Kerlink]

Hello,

We used Proxmox 3 for a long time and decided to start migration of our servers to 4.2 few weeks ago.

Actually we have a lot of question about the default LVM configuration. We can't see the advantages of using thin pool in our case, because the default installation
take the whole disk space for it, and that we can't resize the pool later (is that true ?).

What are the advantages of using a thin pool (except the capacity of make bigger disk vm than real space, we don't need it) ?

For now during the installation of proxmox, we are allocating a minimum space to the data partition (50GB) and increasing it each time we need to install a new CT or VM.

We are thinking about not using lvm-thin pool, just a classic LV for storing .raw disk's images (like on the default local storage).

Is there a performance gap between lvm-thin and .raw disk ?


Thank you

 

[fabian]

LVM-thin also supports snapshots, which plain LVM does not (at least not in a way that is useful for Proxmox use case)

 

[Kerlink]

Thank you for your answer, this is an interesting point we are keeping this in mind for future purposes but we choosed to store our disk images on a "simple" LVM.