Azure/azure-sdk-for-net Azure.Storage.Blobs_12.30.0-beta.1

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12.30.0-beta.1 (2026-07-21)

Features Added

• Added support for service version 2026-10-06.
• Added AccessTier, AccessTierInferred, AccessTierChangedOn, and SmartAccessTier to BlobDownloadDetails.
• Added support for PUT blob operations returning both the existing MD5 content hash and the new CRC64 checksum.
• Added support for Apache Arrow response format for GetBlobs and GetBlobsByHierarchy.
• Added support for the EndBefore property in GetBlobs and GetBlobsByHierarchy. Note that EndBefore is currently only available for Apache Arrow response format and is not returned for XML response format.

Breaking Changes

• Block IDs generated during partitioned uploads are now randomly generated instead of based on sequential integers. This ensures uniqueness across concurrent uploads to the same blob but means block IDs are no longer predictable or ordered.

Other Changes

• Improved performance of DownloadToAsync by buffering each range into memory concurrently instead of streaming one range at a time. This increases throughput but also increases memory consumption, as up to MaximumConcurrency ranges (each up to MaximumTransferLength in size) may be buffered simultaneously. Use StorageTransferOptions.MaximumConcurrency and StorageTransferOptions.MaximumTransferLength to control memory usage.