Officially Supported Datastore Backing Storage List

[RoxyProxy]

Hello Everyone,

apart from the S3 object storage and internal storage media (with ext4/xfs or ZFS) mentioned in the PBS documentation, what types of storage are supported as backing storage for PBS datastores?

Specifically, I am referring to network storage such as a Synology NAS.
Unfortunately, I haven't been able to find a storage compatibility table like the one available for Proxmox VE.
I am aware that performance tends to be poor with file-based network protocols like NFS and SMB but I also read that iSCSI may be a viable option.

Would a setup like PBS being installed on a dedicated server and getting the Storage for the Datastore from a Synology NAS via iSCSI (+multipathing and with ext4 or xfs) be a supported setup?

I have read more often that any type of external Storage for PBS is not supported but I havent found anything official.

I'd love to have more clarity on this topic with official word on what is and isn't supported or only best-effort.
If its the case that this isn't supported a note about that in the documentation would also be great

Thanks everyone!

 

[fabian]

the docs state the following:

• Backup storage:
  
  • Prefer fast storage that delivers high IOPS for random IO workloads; useonly enterprise SSDs for best results.
  • If HDDs are used: Using a metadata cache is highly recommended, for example,add a ZFS special device mirror.

w.r.t. filesystems, xfs, ext4 and ZFS are explicitly mentioned as supported, and FAT explicitly mentioned as not supported for lack of POSIX compat.

performance with NAS/SAN type storages will always be worse than local disks because of the additional latency. many PBS tasks are IOPS and metadata heavy. some implementations of NFS or CIFS/Samba servers are known to be broken or require workarounds because of non-standard behaviour, but in general - besides the performance implications! - they work as backing storage for PBS. FUSE-based implementations of remote storage (like sshfs, rclone, ..) usually don't work (well).