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Merge pull request #5544 from zmanda/fix-gh-5531-azure-backend-upgrade-service-version

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azure: use PutBlob API for uploads instead of PutBlock API + PutBlock List API
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Michael Eischer
2025-10-12 18:24:33 +02:00
committed by GitHub
parent aa0fb0210a f9ff2301e8
commit 1ef785daa3
2 changed files with 34 additions and 19 deletions
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Enhancement: Reduce Azure storage costs by optimizing upload method
Restic previously used Azure's PutBlock and PutBlockList APIs for all file
uploads, which resulted in two transactions per file and doubled the storage
operation costs. For backups with many pack files, this could lead to
significant Azure storage transaction fees.
Restic now uses the more efficient PutBlob API for files up to 256 MiB,
requiring only a single transaction per file. This reduces Azure storage
operation costs by approximately 50% for typical backup workloads. Files
larger than 256 MiB continue to use the block-based upload method as required
by Azure's API limits.
https://github.com/restic/restic/issues/5531
https://github.com/restic/restic/pull/5544