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Increase volumes after release of Tails 5.0

After the 5.0 release we have 2 volumes in our infra that need to be increased. Because these are "big" volumes, I'd like to confirm whether my understanding about their growth is correct and how to best treat them right now.

  • ISO history in www.lizard
  • APT snapshots in apt.lizard

ISO history in www.lizard

The www.lizard:/srv/iso-history volume is 237G in size, currently using 223G (95%).

My understanding is that the ISO history will keep growing at a rate of around 2.5G/release, so at a rate of 13 releases/year increasing this volume by 2.5 * 13 * 2 = 65G would give us 2 years until we need to increase that volume again.

APT snapshots in apt.lizard

The apt.lizard:/srv/apt-snapshots is 985G in size, currently using 930G (95%).

My understanding is that the amount of time-based snapshots is constant (in the long run), so the set of all time-based snapshots grows according to the size of the underlying repositories. Additionally, tagged snapshots grow at a rate of about 1.5G each release.

If this is correct, increasing this disk by 1.5 * 13 * 2 (for tagged snapshots) + 11 (some spare space for time-based) = 50G would give us another 2 years until we need to increase that volume again.

@intrigeri and/or @groente, could any of you confirm whether my understanding and math is correct? Thanks!

Edited by groente-admin