Meeting run by pietroalbini. Minutes written by pietroalbini.
Attending: aidanhs, alexcrichton, kennytm, Mark-Simulacrum, pietroalbini,
shepmaster
Start of the conversation
After an audit of our bandwidth usage for the rust-lang-ci-sccache2 and
rust-lang-ci-mirrors S3 buckets we discovered CI is pulling respectively 8.3
TB and 1.4 TB from them each month. Egress from S3 is pricey (0.09$/GB), while
for us egress from CloudFront is way cheaper (0.04$/month, as across all of our
distributions we transfer out more than 150 TB each month). Putting CloudFront
in front of them is going to save us an estimate of 485$/month.
Thankfully all the data in those buckets is immutable (mirrors are versioned
and all caches are addressed by hash), so there are not going to be any
problems due to cache invalidation. Sccache doesn’t support querying a CDN yet
but aidanhs is going to write some pointers and pietroalbini is going to do the
implementation work. The caches CDN is also going to query a new
rust-lang-ci-caches bucket, to avoid the old naming scheme.
pietroalbini already setup ci-mirrors.rust-lang.org, and is going to do the implementation work to both create a CDN distribution for caches and switch the CI to query the CDN.
There is an effort in the project to centralize all the internal documentation on the forge. pietroalbini proposed to move all the infra team documentation to it. Everyone agreed, as we find value in having everything reachable in a single place. aidanhs pointed out that meeting minutes should not be migrated on the forge.
Europe will switch DST next week, so the next meeting will be at -1 hours for europeans and at the same time for everyone else on the team.
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