4 ms·

But its not cheap, which was my point. 100GB of storage costs: $300/year at tarsnap $36/year at S3

by ac29 12y ago

lucb1e 12y ago
Finally, numbers other than picodollars and gigabyte months and unpredictable deduplication. This convinces me I don't want to store 4TB there at a huge cost($12,000 if it's really $300 a year for 100GB) compared to buying two 4TB drives (~€250 per 3-4 years) and placing them at a friend's with free bandwidth. Don't get me wrong: managed, off-site encrypted backups are very attractive, and I might be willing to pay a premium, especially for software from a trusted person, but not the cost price hundredfold.
- stephenr 12y ago
  Add another $1k to that for data transfer (assuming you only upload that 4tb once)
- patmcc 12y ago
  Tarsnap isn't intended to be used as one-time backup like that, and it's super expensive if used that way. It's very cheap when used to backup (almost) the same 4GB for 1000 days in a row, which is what a lot of people/businesses need for their backup solutions.
  - lucb1e 12y ago
    It's not one time, I'd be incrementally writing updates to the disks. With a raspberry pi or something, the power costs are near negligible.
    - stephenr 12y ago
      Rough estimate here: If you upload 4tb in a year, that's 333.33gb/month So for tarsnap that equals - $1k/year in data transfer charges (4000gb * $0.25 transfer charge * 12 months) - $83/month per month of data (333gb * $0.25 storage cost/month) - $6.4k/year for the first year ($83 * 78 cumulative months in a year) So $7.4k for 12 months resulting in 4tb If usage stays the same each year will add $12k to the incremental yearly cost
      - lucb1e 12y ago
        > that's 333.33gb/month I have 4TB of data, which changes an unknown amount (probably around 20-50GB per month) and grows slightly (probably 5-15GB per month). In any case, thanks for the calculation. Tarsnap is apparently not for the common person who wants to back up everything including their media.
        stephenr 12y ago
        That actually works out worse - $14K for the first year, $13K for the second year.
- girvo 12y ago
  That sort of backup is what AWS Glacier is for, is it not?
  - lucb1e 12y ago
    I guess, I haven't really looked at it yet. And I'd have to find my own software to encrypt it before uploading. Tarsnap's software is one of the major selling points, at least to me.
  - stephenr 12y ago
    I hate to think the cost if you had to restore that data from glacier though.
tomjen3 12y ago
How much do you save after dedublication? Tar-snap could be a lot cheaper if you do frequent backups or you often change little in huge files.
- ac29 12y ago
  Backup tools like attic (which I use) include automatic deduplication. There are surely minor differences in implementation, but tarsnap isnt the only implementation of deduplicating backup.

But its not cheap, which was my point. 100GB of storage costs: $300/year at tarsnap $36/year at S3

by ac29 12y ago

But its not cheap, which was my point. 100GB of storage costs: $300/year at tarsnap $36/year at S3

Finally, numbers other than picodollars and gigabyte months and unpredictable deduplication. This convinces me I don't want to store 4TB there at a huge cost($12,000 if it's really $300 a year for 100GB) compared to buying two 4TB drives (~€250 per 3-4 years) and placing them at a friend's with free bandwidth. Don't get me wrong: managed, off-site encrypted backups are very attractive, and I might be willing to pay a premium, especially for software from a trusted person, but not the cost price hundredfold.

stephenr 12y ago
Add another $1k to that for data transfer (assuming you only upload that 4tb once)
patmcc 12y ago
Tarsnap isn't intended to be used as one-time backup like that, and it's super expensive if used that way. It's very cheap when used to backup (almost) the same 4GB for 1000 days in a row, which is what a lot of people/businesses need for their backup solutions.
- lucb1e 12y ago
  It's not one time, I'd be incrementally writing updates to the disks. With a raspberry pi or something, the power costs are near negligible.
  - stephenr 12y ago
    Rough estimate here: If you upload 4tb in a year, that's 333.33gb/month So for tarsnap that equals - $1k/year in data transfer charges (4000gb * $0.25 transfer charge * 12 months) - $83/month per month of data (333gb * $0.25 storage cost/month) - $6.4k/year for the first year ($83 * 78 cumulative months in a year) So $7.4k for 12 months resulting in 4tb If usage stays the same each year will add $12k to the incremental yearly cost
    - lucb1e 12y ago
      > that's 333.33gb/month I have 4TB of data, which changes an unknown amount (probably around 20-50GB per month) and grows slightly (probably 5-15GB per month). In any case, thanks for the calculation. Tarsnap is apparently not for the common person who wants to back up everything including their media.
      - stephenr 12y ago
        That actually works out worse - $14K for the first year, $13K for the second year.
girvo 12y ago
That sort of backup is what AWS Glacier is for, is it not?
- lucb1e 12y ago
  I guess, I haven't really looked at it yet. And I'd have to find my own software to encrypt it before uploading. Tarsnap's software is one of the major selling points, at least to me.
- stephenr 12y ago
  I hate to think the cost if you had to restore that data from glacier though.

tomjen3 12y ago

How much do you save after dedublication? Tar-snap could be a lot cheaper if you do frequent backups or you often change little in huge files.

ac29 12y ago
Backup tools like attic (which I use) include automatic deduplication. There are surely minor differences in implementation, but tarsnap isnt the only implementation of deduplicating backup.