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Re: Confusion about including and excluding files in tarsnap.conf versus the command line
- To: Craig Hartnett <firstname.lastname@example.org>
- Subject: Re: Confusion about including and excluding files in tarsnap.conf versus the command line
- From: Graham Percival <email@example.com>
- Date: Mon, 12 Nov 2018 11:05:46 -0800
- Cc: firstname.lastname@example.org
- In-reply-to: <1541988151.9798.22.camel@wrathall>
- References: <1541726412.2640.39.camel@wrathall> <20181109020712.GA25955@mac> <1541988151.9798.22.camel@wrathall>
On Sun, Nov 11, 2018 at 06:02:31PM -0800, Craig Hartnett wrote:
> But I have to ask now, and it's something I think would be very useful
> to include on the "Getting started" page, how long should the first
> back-up take? I realise that's asking how long is a piece of string, but
> my first back-up has been going for a little over 28 hours now.
> According to my dry run I should have about 85 GB of compressed data to
> upload. I'm on a (Shaw) cable connection ... not their fastest, but I
> suspect the connection isn't the bottleneck.
I'm pretty certain that your first upload will be limited by your upload speed.
85 GB is a lot, and cable ISPs often have a lower upload speed than download.
If your Shaw cable offers 150 kb/s of sustained upload, then I think it
will take 6.5 days. Let's do this in MB:
85000 MB / 0.150 MB/s = 566667 seconds
566667 seconds / 60 s/m / 60 m/h = 157.4 hours
If you have sustained upload of 300 kb/s, that would only be 78.7 hours, or 3
days. Which, come to think of it, looks close to the time you estimated.
(Also, note that some ISPs offer a higher "burst" upload rate, but throttle it
down to a lower level if lasts for longer than some amount of time.)
> Interrupting the process with "killall -SIGUSR1 tarsnap" shows me that
> there is progress, but I have no idea if I'm 10% in or 90% in.
Right. I've been working on displaying more info (if requested by the user),
but nothing's made it in yet.