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> Also, RAID is not a backup. You are absolutely right, but there are use-cases where backup is too expensive, so investing into robustness and availability is
by ggeorgovassilis 6y ago
> Also, RAID is not a backup.
You are absolutely right, but there are use-cases where backup is too expensive, so investing into robustness and availability is the only option left.
- barrkel 6y agoBackups give you a third thing: immutability. You can have a nice redundant storage for local performance and resilience, even geographic replication for resilience against a single site loss, but you need snapshots of some kind to protect against replicated destructive updates.
- nix23 6y ago>backup is too expensive, so investing into robustness and availability is the only option left. No please don't say something like that if you love your data. Raid is for the availability of your data, a Backup is the secure storage/versioning of you data, two completely different things.
- ggeorgovassilis 6y agoMy love for my data has a price tag :-) If I afford backup with this amount, I need to cut down on other expenses in my life.
- nix23 6y agoHave a look at some used LTO4 tape-drives ~40$ they can store up to 1.6TB per Tape (compressed) and are the perfect thing to offline your data.
- ggeorgovassilis 6y agoThanks. I looked at the specifications; it's not clear how that would connect to the server. All SATA ports are taken and USB is too slow (estimated 72 hours) for a full backup and would require 6-8 tape changes.
- oarsinsync 6y agoGood, cheap, fast. Pick two.
- nix23 6y agoUsed PCIe Fiber card or cloud-something like Tarsnap or Backblaze? BTW: For Tape it's REALLY important to have a steady Dataflow, too slow like USB is a big NONO, you NEED something like SAS/SATA or Fibre. The tape can but should not stop and wait for new data to be written. EDIT: Well then look at LTO5 (double cap)...LTO6 is probably still too expensive.
- ValentineC 6y agoIt might help separating your data into different tiers of "love", and deciding on your backup strategies from there. For example, my irreplaceable photos (probably around 3TB worth) get packed into year-based TAR files, then uploaded to Glacier Deep Archive. It's only around $3 USD a month. I won't have to care about retrieval cost for the moment, because I think I'll only need to touch it in the event of a catastrophe. Most media files and Linux ISOs don't get backed up at all.