ZFS: Use mirror vdevs, not RAIDZ

Post by mindslight » Fri, Dec 11, 2020, 5:42 PM UTC

Dylan16807 wrote: post #128

mindslight wrote: post #124

Earlier quoted context omitted.

I was speaking generally. I'm glad the service fits for you, and it appears that they have setup reasonably-structured incentives. 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 rem…

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 b…

Post by dspillett » Thu, Dec 17, 2020, 3:01 PM UTC

xoa wrote: post #89

dspillett wrote: post #72

Earlier quoted context omitted.

You need to do more than just keep a backup of current state, if you want to deal with problems other than complete failure/destruction of the primary. What about accidental deletion and incorrect editing (done too long ago for "undo" to work)?

> What about accidental deletion and incorrect editing (done too long ago for "undo" to work)? Eh? We're talking ZFS here. Built-in atomic low cost snapshots are part of the core feature set. If we're talking using a pool and backing up another pool it's a reasonable baseline assumption that one would be using either their own or one of the many mature scripts to have regular automatic snapshots and retention schedul…