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[1/7] feat: multi-level caching with automatic backfill#7

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mmastrac wants to merge 1 commit intovercel/ci-fixesfrom
vercel/multilevel-caching
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[1/7] feat: multi-level caching with automatic backfill#7
mmastrac wants to merge 1 commit intovercel/ci-fixesfrom
vercel/multilevel-caching

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Summary

Cherry-picked from upstream PR mozilla#2581.

  • Adds hierarchical cache storage (e.g., disk -> redis -> s3) with configurable write tolerance policies
  • Automatic backfill from slower tiers to faster ones
  • New SCCACHE_MULTILEVEL_CHAIN env var for configuration

Stack: 1/6

Upstream: mozilla#2581

@mmastrac mmastrac force-pushed the vercel/multilevel-caching branch from 22b3037 to 822ae6b Compare March 31, 2026 17:35
@mmastrac mmastrac changed the title [0/5] feat: multi-level caching with automatic backfill [1/6] feat: multi-level caching with automatic backfill Mar 31, 2026
@mmastrac mmastrac changed the base branch from upstream to vercel/ci-fixes March 31, 2026 17:36
Cherry-picked from upstream PR mozilla#2581.

Adds hierarchical cache storage (e.g., disk -> redis -> s3) with
configurable write tolerance policies and automatic backfill from
slower tiers to faster ones.

Upstream: mozilla#2581

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@mmastrac mmastrac force-pushed the vercel/multilevel-caching branch from 822ae6b to 8261038 Compare March 31, 2026 17:38
@mmastrac mmastrac changed the title [1/6] feat: multi-level caching with automatic backfill [1/7] feat: multi-level caching with automatic backfill Mar 31, 2026
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