Proxmox Backup Server 3.1-2 Set ZFS Quotas

[Dexter23]

I want to set zfs quotas for my datastore to avoid problem when it's full, this is my proxmox backup server installation:


I add a datastore in this path:


This is the output of zfs list -t all:


In my case i need for set quota i need to do this command right?
zfs set quota=712G rpool (80%)

 

[Chris]

Hi,
this depends on how you set up your storage. If you have a dedicated zfs dataset for a datastore, you can set the quota directly on that dataset, otherwise you will have to set quotas on the parent dataset.
To set the quota on a dataset, you can run zfs set quota=<size> <zpool>/<datastet>.

 

[Dexter23]

is better create a dataset? or i leave in /mnt/backup

 

[Chris]

is better create a dataset? or i leave in /mnt/backup

You could create a dedicated dataset per datastore if you would like to set zfs properties on a per datastore level. However, if your intention is to avoid running out of space on the pool, you can of course set the quota directly on the pool.

 

[Dexter23]

You could create a dedicated dataset per datastore if you would like to set zfs properties on a per datastore level. However, if your intention is to avoid running out of space on the pool, you can of course set the quota directly on the pool.

i create directly on "rpool", thanks

 

[Dexter23]

Hi
I have a problem, even if i set the quota on "rpool" now i have the datastore mount on "/mnt/backup" full and off course i can't prune and start garbage because there aren't space to do.
But why the space il full even if i set the quota on zfs?

 

[Chris]

Hi
I have a problem, even if i set the quota on "rpool" now i have the datastore mount on "/mnt/backup" full and off course i can't prune and start garbage because there aren't space to do.
But why the space il full even if i set the quota on zfs?
View attachment 70589

Well, the quota does not mean that you cannot run out of space: It just limits how much space the dataset and its child datasets are allowed to allocate, so it is a safety net. You can now increase the quota in order for the garbage collection to work, then you should look into increasing your available pool size, or perform more frequent pruning and garbage collection.

 

[Dexter23]

Hi @Chris
So when i running out of space basically i can remove the quota i set on dataset and run prune and garbage collection and then re-add the quota to zfs right?
Is possible to configure email alert to when the datastore space avalaible is less than 20%?