ZFS replication on 2 proxmox nodes

[redhanded29]

Hi,

Apologies I'm a newbie and if this has been answered on other threads but just want to make sure this will work before I buy these expensive SSDs..

I have a proxmox cluster who i have a boot drive/proxmox OS then i have a separate drive for zfs comprised of 2 pieces x 4tb SSDs in mirror (4tb x 2) on zfs "tank"

If i have another proxmox cluster and have a separate drive for proxmox OS, then I create a zfs pool but with 4 pieces x 2tb (SSD).. 2tb x 2 = 4 tb then mirror will ZFS replication work? or this is not recommended and i need to buy 2 pieces x 4tb SSDs in mirror (4tb x 2)?

Also in the future, if i need more storage am i able to add more disks on the zfs pool or i need to create a new pool?

Thank you Proxmox Guru's in advance,

Regards,
Redhanded

 

[redhanded29]

#help-on-zfs

 

[redhanded29]

bump please help

 

[Johannes S]

Hi,

Apologies I'm a newbie and if this has been answered on other threads but just want to make sure this will work before I buy these expensive SSDs..

I have a proxmox cluster who i have a boot drive/proxmox OS then i have a separate drive for zfs comprised of 2 pieces x 4tb SSDs in mirror (4tb x 2) on zfs "tank"

If i have another proxmox cluster and have a separate drive for proxmox OS, then I create a zfs pool but with 4 pieces x 2tb (SSD).. 2tb x 2 = 4 tb then mirror will ZFS replication work? or this is not recommended and i need to buy 2 pieces x 4tb SSDs in mirror (4tb x 2)?

For replication inside the cluster you just need zfs storages with the same Name. E.g. on node1 and node2 the storage must be Namen local-zfs or vmpool. The Pools Layout is not relevant. Storage replication between different clusters is not possible at the moment but pve-zsync can be used to achieve something simmiliar:

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

https://pve.proxmox.com/wiki/PVE-zsync

For remote-migration between clusters ( via commandline or Proxmox datacenter Manager) zfs is NOT required.

Also in the future, if i need more storage am i able to add more disks on the zfs pool or i need to create a new pool?

You can add more disks to the existing Pools see https://pve.proxmox.com/wiki/ZFS_on_Linux

 

[redhanded29]

Hi Johannes,

Thank you yes it would be on the same cluster (sorry for noting another cluster) it is pve1 and pve2 on the same cluster, your response confirms I can do different layout of drives i.e. 4 x 2tb SSD then zfs replication will still work.. reason im preferring more drives than 2 x 4TB drive, as 4TB is quite expensive if it breaks down, if i shrunk it to 4 x 2TB pieces its cheaper to replace 2tb drive than 4TB.. Yes I will be using the same name for both pve1 and pve2 which will be on the same cluster..

Thank you for your help,

Regards,
Redhanded