Re:ZFS: Use mirror vdevs, not RAIDZ
by Dylan16807 on Thursday December 10, 2020 @02:18PM
(#25377309)
Unless you have tons of data churn or really love burst uploads, you should treat Jottacloud as roughly 15TB of capacity. Here's the speed chart: https://docs.jottacloud.com/en/articles/3271114-reduced-uplo...
So for 24TB you would use two accounts, assuming they're fine with that, and your uploads would run at 5Mbps per thread, with 12 threads in parallel.
That will let you upload 100GB every 4 hours, which should be enough. And the total cost would be 180EUR/year, which is pretty far from $1000.
Re:ZFS: Use mirror vdevs, not RAIDZ
by mindslight on Friday December 11, 2020 @12:42PM
(#25388397)
Thanks for taking the time to explain the details of their offering. I agree that looks well thought out and a much better value than anything else I've seen, especially for the market of personal NAS stuff we're talking about. And a quick search looks like it can be supported by Free (ie secure) backup solutions like duplicity.
But using that pricing, 24TB with Jottacloud would be 450 EUR/year, which is still on the order of $1000. The larger point is that disk sizes are always growing, and while 24TB may seem unnecessary to you, it's very easy to build an array that is cumbersome to backup. And IME this has remained true for the past two decades.
You're right that the cost effective way of performing large backups seems to be just buying another array and hosting it somewhere offsite. But that still doubles your array cost, and so is not something to be done lightly.
FWIW personal users want availability too, unless rebuilding arrays from scratch is your hobby. A simple mirror is a form a raid, which you can only get away with if your storage requirements can be taken care of by a single spindle. If that's where you are, fantastic. But that doesn't describe most home ZFS users.