Sunsetting Tuscolo2025h2

[Filippo Valsorda]

Hello carbon-based lifeforms,

It's allegedly 2026, so we are all busy archiving our 2025h2 shards.

To make the process as boring as possible, I am updating Sunlight to automatically turn read-only a week after the NotAfter limit. You can review the PR at https://github.com/FiloSottile/sunlight/pull/53. It's already running on Navigli.

We will rollout this change and sunset Tuscolo2025h2 in the following stages:

1. Tuesday 2026-01-13, 1300–1400Z — roll out #53 to Tuscolo
   Tuscolo2025h2 will become automatically read-only, returning 410s to add-[pre-]chain
2. Tuesday/Wednesday 2026-01-13/2026-01-14 — follow the "Archiving a log shard" public playbook
   Tuscolo2025h2 will become available on the Internet Archive and on ct-archive
3. Monday 2026-01-16, 1600–1800Z — follow the "Decommissioning a log shard" public playbook
   Tuscolo2025h2 will become unavailable
   

Let us know if you have any feedback on the proposed change or plan.

Cheers,

Filippo

[Filippo Valsorda]

2026-01-12 23:40 GMT+01:00 Filippo Valsorda <fil...@ml.filippo.io>:

Monday 2026-01-16, 1600–1800Z — follow the "Decommissioning a log shard" public playbook

Monday 2026-01-19, 1600–1800Z.

sigh

[Filippo Valsorda]

2026-01-12 23:40 GMT+01:00 Filippo Valsorda <fil...@ml.filippo.io>:

1. Tuesday 2026-01-13, 1300–1400Z — roll out #53 to Tuscolo
   Tuscolo2025h2 will become automatically read-only, returning 410s to add-[pre-]chain
   

This step was completed uneventfully. Tuscolo2025h2 is now read-only, and the final checkpoint is listed at

https://tuscolo2025h2.sunlight.geomys.org/log.v3.json

[Filippo Valsorda]

Hello everyone,

Unfortunately, the Internet Archive has a (very reasonable) 1100GB limit on item size, which Tuscolo2025h2 exceeds. I don't want to circumvent it by splitting the archive over multiple items, both for convenience and to respect the spirit of the limit.

Instead, we created a torrent file and will be seeding it for the foreseeable future.

https://raw.githubusercontent.com/geomys/ct-archive/refs/heads/main/torrents/ct_geomys_tuscolo2025h2.torrent

If anyone has suggestions for long-term homes for larger log archives, we'd love to hear them!

Cheers,

Filippo

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