yaplej
Dabbler
- Joined
- Jun 17, 2015
- Messages
- 22
Hello there,
We need to put together an archival solution for our backups. Originally we were going to use Microsoft Storage Spaces but started to think of alternative solutions after finding some serious shortcoming with Storage Spaces as a long term archiving repository.
The main thing is we need two systems that will two-way replicate/sync between each other so if we drop files on either one they get replicated to the other for offsite, redundant backups. We would like to use deduplication because its going to store very large archive files basically forever. These will likely never be modified but some of the large files could possibly deleted at some point.
Our hardware is:
2x Dell Poweredge R820s
There are a few options with creating vdevs with this many drives going with 2-3 RaidZ2 vdevs per enclosure seems like a good idea. Then there are posts leaning towards a single RaidZ3 vdev per enclosure. Seems like if you had 4x MD1200's you could do RaidZ2 vdevs that span all 4 of the enclosures and have enclosure redundancy... Our Compellent SAN is also based on ZFS and uses RaidZ2 + 1 Hotspare per enclosure. We are trying to decide if we actually need the Spare if FreeNAS is unable to automatically initiate a "resilvering?". Odd term but I'm sure it makes sense to someone. :) It would be easy enough to have a few of these disks on-site for staff to swap should we need to rebuild one of them.
We need to put together an archival solution for our backups. Originally we were going to use Microsoft Storage Spaces but started to think of alternative solutions after finding some serious shortcoming with Storage Spaces as a long term archiving repository.
The main thing is we need two systems that will two-way replicate/sync between each other so if we drop files on either one they get replicated to the other for offsite, redundant backups. We would like to use deduplication because its going to store very large archive files basically forever. These will likely never be modified but some of the large files could possibly deleted at some point.
Our hardware is:
2x Dell Poweredge R820s
- 4x E5-4640 0 @ 2.40GHz
- 128GB ram
- 2x ST9300653SS 300GB 15k (boot)
- 6x SM843 480GB SSD (zil/l2arc?)
- 2x Dell PowerVault MD1200
- 24x WD4001FYYG 4TB 7k disks
There are a few options with creating vdevs with this many drives going with 2-3 RaidZ2 vdevs per enclosure seems like a good idea. Then there are posts leaning towards a single RaidZ3 vdev per enclosure. Seems like if you had 4x MD1200's you could do RaidZ2 vdevs that span all 4 of the enclosures and have enclosure redundancy... Our Compellent SAN is also based on ZFS and uses RaidZ2 + 1 Hotspare per enclosure. We are trying to decide if we actually need the Spare if FreeNAS is unable to automatically initiate a "resilvering?". Odd term but I'm sure it makes sense to someone. :) It would be easy enough to have a few of these disks on-site for staff to swap should we need to rebuild one of them.