Thin provisioning shareable volume

[avillar]

Hi team,
I am creating a Proxmox cluster, and the storage target is a Pure Storage array (although most likely for this question is rather irrelevant). I created two volumes at this point and presented them to one Proxmox host (Virtual Environment 8.3.4).
I created a LVM with the first volume, added a few VMs, and I noticed that it fully acts as thick provision storage. The problem is that for the host the volume is full, while for the array is less than 10% used.
I tried to run fstrim (from the VMs and on the host), the service is running, but I cannot see any improvement.
Then, with the second volume, I decided to create a LVM Thin. But then I noticed that it cannot be shared. Not good for a cluster.

What am I doing wrong, and what else can be done to ensure the storage available use thin provisioning and can be shared in the cluster?

Thanks in advance.

 

[czechsys]

https://pve.proxmox.com/wiki/Storage

 

[avillar]

I can see you are short on words, @czechsys.

 

[avillar]

The target is block FC. So, yes, I read that link. Anything else?

 

[bbgeek17]

What am I doing wrong, and what else can be done to ensure the storage available use thin provisioning and can be shared in the cluster?

Hello, @avillar .
When using PVE with built-in storage pool schemes, your options for shared centralized storage (FC SAN) are limited to thick LVM.

We've written an article detailing the technology and implementation steps: Proxmox LVM Shared Storage.

Additionally, external schemes like the OCFS clustered filesystem may provide alternatives, allowing you to use thin QCOW files in a shared setup.

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Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[avillar]

Thanks, @bbgeek17, I'll do a detailed read on the document and check if OCFS clustered filesystem is something I can somehow implement.