[Tails-dev] reducing the amount of data on our mirrors

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Author: sajolida
Date:  
To: The Tails public development discussion list
Subject: [Tails-dev] reducing the amount of data on our mirrors
Hey,

The administrator of one of our mirrors ran out of disk space. That made
me realize that as of now, the size of those mirrors is ever growing as
we are keeping all past IUK:

https://archive.torproject.org/amnesia.boum.org/tails/stable/iuk/

I might have been insisting in the past on keeping more than one IUK
available, but what about trying to limit them to the most relevant
ones? I would remove:

- The ones that dates from before a release that forced a manual
upgrade. This was the case of least for Tails 1.1 (Wheezy), Tails 1.2.2
or 1.2.3, Tails 4.0 (Jessie).
- The ones from RC before the latest major version. I find it reasonable
to assume that people playing with RC would update it at least in the 12
weeks following that release.

So out of 9 current IUK on our mirrors:

[   ] Tails_i386_0.23_to_1.0.iuk      27-Apr-2014 22:25  150M
[   ] Tails_i386_1.0_to_1.0.1.iuk     08-Jun-2014 20:47  194M
[   ] Tails_i386_1.0~rc1_to_1.0.iuk   27-Apr-2014 22:26  136M
[   ] Tails_i386_1.1.1_to_1.1.2.iuk   24-Sep-2014 22:27  186M
[   ] Tails_i386_1.1.2_to_1.2.iuk     15-Oct-2014 23:36  191M
[   ] Tails_i386_1.1_to_1.1.1.iuk     01-Sep-2014 01:22  255M
[   ] Tails_i386_1.1~rc1_to_1.1.iuk   22-Jul-2014 18:11  235M
[   ] Tails_i386_1.2_to_1.2.1.iuk     03-Dec-2014 14:04  232M
[   ] Tails_i386_1.2~rc1_to_1.2.iuk   15-Oct-2014 23:36  164M


We would be left with only 5:

[   ] Tails_i386_1.1.1_to_1.1.2.iuk   24-Sep-2014 22:27  186M
[   ] Tails_i386_1.1.2_to_1.2.iuk     15-Oct-2014 23:36  191M
[   ] Tails_i386_1.1_to_1.1.1.iuk     01-Sep-2014 01:22  255M
[   ] Tails_i386_1.2_to_1.2.1.iuk     03-Dec-2014 14:04  232M
[   ] Tails_i386_1.2~rc1_to_1.2.iuk   15-Oct-2014 23:36  164M


Other more simple algorithms could be to:

  - Keep them for at most six months.
  - Always keep at most 1GB of IUK (without counting RCs) because
    starting from 1GB of IUK it's lighter to do a manual upgrade.


What do you think?

--
sajolida