[plug] Tapes

[John McCabe-Dansted]

On Thu, 30 Mar 2023 at 17:36, Brad Campbell <brad at fnarfbargle.com> wrote:

> Having had a play for a week or so, I've found pigz -i compresses nearly
> as well as lbzip2 and 3 times faster. Admittedly the CPU is an old AMD
> FX-8350, so it's not exactly a screamer.
> I'm using a 996GB source directory of 28 rsync backups from various
> machines ranging from ~250M to ~590G. I tar and compress these to the
> staging drive before writing them to tape.
>

Is this to avoid the shoe-shining effect?


> tar through lbzip2 gets them down to 753G in 5 hours 23 minutes. That is
> limited by compression.
> tar through pigz -i gets them down to 763G in 1 hour 50 minutes. That's
> not limited by compression, rather tar reading the data from the "super
> cheap and nasty budget SSD" I chose to play with.
>

You could also try `zstd -T8`
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