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Antalya 26.8 BACKUP of CAS tables to S3 on the same endpoint - #2508

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k-morozov wants to merge 6 commits into

feature/antalya-26.8/pr-2159from

feature/antalya-26.8/pr-2159-cas-backup

Draft

Antalya 26.8 BACKUP of CAS tables to S3 on the same endpoint#2508
k-morozov wants to merge 6 commits into
feature/antalya-26.8/pr-2159from
feature/antalya-26.8/pr-2159-cas-backup

Commits on Oct 7, 2026
- Merge pull request #2415 from Altinity/cas/backup-native-copy-bug
  
  filimonov
  authored and
  k-morozov
  committed
  127b63e
Commits on Oct 8, 2026
- Cherry-pick of https://github.com/Altinity/ClickHouse/pull/2494
  
  k-morozov
  and
  claude
  committed
  d1a79e8
- Use `copyS3FileRange` for the ranged copy of a CAS blob in a backup
  
  k-morozov
  and
  claude
  committed
  b112223
- Document that a CAS blob of 5 MiB or smaller is backed up through buffers
  
  k-morozov
  and
  claude
  committed
  55b194e
- Reuse the upstream ranged S3 copy for CAS backups
  
  k-morozov
  and
  claude
  committed
  0ba5e11
- Update the CAS backup docs for the upstream ranged S3 copy
  
  k-morozov
  and
  claude
  committed
  1216d8d