6 ms·

Cloud backup will never work for 8T of data :-)

Johnny555 8y ago
With a gigabit internet connection, it would take about a day to backup 8TB. 100mbit could do it in 222 hours. At 10mbit, about 90 days.
- sametmax 8y ago
  Most non tech savvy people don't even have that much data to backup: most of their heavy stuff (music, pictures, etc), are now attached to an online service. Plus you only do it once. Differential backup would take down the size of the next backups to a few Gb, or even Mb.
- dsr_ 8y ago
  It turns out that actual throughput on nominal "gigabit" consumer ISP connections ranges from 0-95% of the branding. It is only safe to consider them as "may burst as high as 980 Mb/s" and to actually test your connections to any given destination. Oversubscription and the resulting congestion are assumed into the consumer ISP model.
- ams6110 8y ago
  Even assuming that a consumer "gigabit" connection is actually delivering that speed, you also have bottlenecks in the wire protocol (sftp or scp or https or whatever) and the storage service. It would take me longer than a day to copy 8T to the archive storage within my own data center using HSI (an ftp-like utility for accessing HPSS storage).
- s3m4j 8y ago
  Last year I took a subscription to Backblaze, (incidentally) I have around 8TB of data, I have a gigabit upload (a real one), but Backblaze servers are on the other side of the planet for me. It took around 3 or 4 months to upload it all. That's to say, there's more to it than upload speed, if Backlaze had servers in Europe I'd recommend it much more than I do.
  - skookumchuck 8y ago
    What about another 3 or 4 months to download a restore?
    - Johnny555 8y ago
      The core data that I'd want to restore immediately if I lost my primary fileserver is only around 100GB or less I have several TB's of other data (mostly photos, videos, etc) that I'm fine waiting for weeks or months for if needed, but if you're in a hurry, Backblaze will sell you a hard drive that they restore your backup to and mail it to you.
      - skookumchuck 8y ago
        At that point, one might as well just wind it off to a hard disk in the first place, then store it offsite.
        Johnny555 8y ago
        Then I'd need multiple hard drives for redundancy, and I have to bring them back and read them regularly to make sure the data is all readable. And while I have a large amount of data that I rarely touch, I have a small amount that changes frequently, so I need to include that data in my off-site backup too. Or I could just sign up for a cloud backup service, spend a month or so uploading my initial snapshot of data, and then backups are automatic and always offsite, replicated, and scrubbed. For $10/month.
- naveen99 8y ago
  EnTouch limits me to 1tb / month on gigabit fiber
- gowld 8y ago
  + $400/yr for storage. A few hard drives, DVDs, and tapes are much cheaper and pretty easy (even if you have to pay $500 once to get an IT pro's help.)
  - Retric 8y ago
    HDD need regular replacements if you want them to work in 30 years. It's cheaper than 400$/year, but not as much as you might think especially if you want to ensure 3 copies of each piece of data.
sekh60 8y ago
Got about 25TB with crashplan so far. It is slow to upload, but I am slowly getting the 35TB and counting uploaded.

With a gigabit internet connection, it would take about a day to backup 8TB. 100mbit could do it in 222 hours. At 10mbit, about 90 days.

sametmax 8y ago
Most non tech savvy people don't even have that much data to backup: most of their heavy stuff (music, pictures, etc), are now attached to an online service. Plus you only do it once. Differential backup would take down the size of the next backups to a few Gb, or even Mb.
dsr_ 8y ago
It turns out that actual throughput on nominal "gigabit" consumer ISP connections ranges from 0-95% of the branding. It is only safe to consider them as "may burst as high as 980 Mb/s" and to actually test your connections to any given destination. Oversubscription and the resulting congestion are assumed into the consumer ISP model.
ams6110 8y ago
Even assuming that a consumer "gigabit" connection is actually delivering that speed, you also have bottlenecks in the wire protocol (sftp or scp or https or whatever) and the storage service. It would take me longer than a day to copy 8T to the archive storage within my own data center using HSI (an ftp-like utility for accessing HPSS storage).
s3m4j 8y ago
Last year I took a subscription to Backblaze, (incidentally) I have around 8TB of data, I have a gigabit upload (a real one), but Backblaze servers are on the other side of the planet for me. It took around 3 or 4 months to upload it all. That's to say, there's more to it than upload speed, if Backlaze had servers in Europe I'd recommend it much more than I do.
- skookumchuck 8y ago
  What about another 3 or 4 months to download a restore?
  - Johnny555 8y ago
    The core data that I'd want to restore immediately if I lost my primary fileserver is only around 100GB or less I have several TB's of other data (mostly photos, videos, etc) that I'm fine waiting for weeks or months for if needed, but if you're in a hurry, Backblaze will sell you a hard drive that they restore your backup to and mail it to you.
    - skookumchuck 8y ago
      At that point, one might as well just wind it off to a hard disk in the first place, then store it offsite.
      - Johnny555 8y ago
        Then I'd need multiple hard drives for redundancy, and I have to bring them back and read them regularly to make sure the data is all readable. And while I have a large amount of data that I rarely touch, I have a small amount that changes frequently, so I need to include that data in my off-site backup too. Or I could just sign up for a cloud backup service, spend a month or so uploading my initial snapshot of data, and then backups are automatic and always offsite, replicated, and scrubbed. For $10/month.
naveen99 8y ago
EnTouch limits me to 1tb / month on gigabit fiber
gowld 8y ago
+ $400/yr for storage. A few hard drives, DVDs, and tapes are much cheaper and pretty easy (even if you have to pay $500 once to get an IT pro's help.)
- Retric 8y ago
  HDD need regular replacements if you want them to work in 30 years. It's cheaper than 400$/year, but not as much as you might think especially if you want to ensure 3 copies of each piece of data.

sekh60 8y ago

Got about 25TB with crashplan so far. It is slow to upload, but I am slowly getting the 35TB and counting uploaded.