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# AI 3.8-15.1.3 Release Notes

## Summary

### New Features

* **Google Cloud Storage multipart upload support** extends multipart upload capability to GCS-backed deployments.

### Major Enhancements

* **FUSE random access stream improvements** add a new local-backed stream path for workloads that need better random-read behavior through FUSE.
* **S3 write cache improvements** add `if-none-match` support, improve empty-file handling, and strengthen async persist transaction behavior.
* **FUSE stream-path tuning** further reduces lock contention during random-access metadata operations.
* **Worker read-path optimizations** reduce memory-copy overhead in high-throughput paths.

### Bug Fixes

* **Job Service free operations** now report results more accurately and avoid known failure cases.
* **S3 write cache fallback reads and path-configuration handling** are more reliable for multipart-upload and overwrite scenarios.
* **Recursive deletion** now removes files more reliably in affected delete flows.
* **S3 API path validation** is corrected for tenant-aware requests.
* **FDB metadata handling** fixes root-transient access issues and cleans up empty-directory edge cases.

## Breaking Changes

No breaking changes in this release.

## Upgrade Notes

No migration steps are required for this release.