Microsoft Releases DirectStorage 1.4 Preview

🔑 Enhanced Key Takeaways

• •DirectStorage 1.4 introduces Zstandard (Zstd) compression support for both CPU and GPU decompression, with an open-sourced GPU decompression compute shader optimized for 256KB chunks.[1][2][3]
• •Game Asset Conditioning Library (GACL) is a new pipeline toolset that standardizes asset conditioning and compression, including shuffle transform types specified via DSTORAGE_GACL_SHUFFLE_TRANSFORM_TYPE.[1][2]
• •Added D3D12 CreatorID support through DSTORAGE_CONFIGURATION2 and DStorageSetConfiguration2 for improved GPU command queue parallelization and execution scheduling.[2][3]
• •Buffered file IO support enables use on HDDs benefiting from OS caching, plus IDStorageQueue2::GetCompressionSupport API for runtime path queries.[2]
• •Announced at GDC 2026 DirectX State of the Union session on March 11, with partnerships from Intel and NVIDIA for Zstd optimizations.[3][5]

🛠️ Technical Deep Dive

• •Zstd integration via IDStorageQueue's EnqueueRequest API and DStorageCreateCompressionCodec with DSTORAGE_COMPRESSION_FORMAT_ZSTD; supports multi-tier CPU/GPU decompression.[2][3]
• •D3D12 CreatorID configuration: New DSTORAGE_CONFIGURATION2 struct with global CreatorID field; set via DStorageSetConfiguration2() to group command queues per device.[2][3]
• •GACL features: DSTORAGE_GACL_SHUFFLE_TRANSFORM_TYPE enum in DSTORAGE_REQUEST_OPTIONS struct for request-level shuffle transforms.[2]
• •Buffered IO: New flag for enabling OS file caching on HDDs; IDStorageQueue2::GetCompressionSupport indicates decompression path for GPU formats.[2]
• •Open-sourced Zstd GPU shader on GitHub, initially for ≤256KB chunks, with planned performance expansions.[3]

🔮 Future ImplicationsAI analysis grounded in cited sources

⏳ Timeline