Has anyone done a benchmark / comparison / benefits analysis of these two options below? I'm looking to centralize all my VM storage to a NAS (currently all VMs are in each cluster node local-zfs storage)
Primarily looking for:
* Improved disk space savings via deduplication, since central NAS having duplicate/templates/same-in-kind VMs like Windows should save disk space due to deduplication.
* Improved performance (thanks to caching), Synology has write-back caching that my current cluster nodes do not.
* Bigger space availability (a big central place vs. small disks across many nodes), currently my cluster nodes have NVME disk space ranging from 512gb to 2tb - I am considering a NAS that's nvme only plus has backup hdd storage replication.
Some of my notes about the options I am considering and looking for folks with some experience in the below to correct me?
Primarily looking for:
* Improved disk space savings via deduplication, since central NAS having duplicate/templates/same-in-kind VMs like Windows should save disk space due to deduplication.
* Improved performance (thanks to caching), Synology has write-back caching that my current cluster nodes do not.
* Bigger space availability (a big central place vs. small disks across many nodes), currently my cluster nodes have NVME disk space ranging from 512gb to 2tb - I am considering a NAS that's nvme only plus has backup hdd storage replication.
Some of my notes about the options I am considering and looking for folks with some experience in the below to correct me?
- Synology NAS iSCSI - Proxmox LVM shared storage
- LVM seems to allow any node in the cluster to be able to host any VMs and provide HA. But we lose proxmox snapshots...
- Synology has write-back cache, which according to documentation by synology it should help with improving performance for frequently used blocks.
- Synology uses btrfs under the hood, thick LUNs provisioned do not benefit from deduplication and Synology recommends against trying to enable it when LUNs are used for VM storage.
- Very intuitive GUI and "just works" solution
- TrueNAS Scale NAS ZFS over iSCSI - Proxmox ZFS
- (unsure) seems like this would provide the "deduplication" benefits of multiple windows VMs that are related and save on storage space.
- L2ARC caching should in theory be better and faster than synology btrfs + flashcache (I could be wrong)
- Ability to take snapshots easily and closely integrated with PVE.
- More complex setup than Synology, may require some elbow grease and some tweak in settings to make it perform its best.
