Microsoft.Orleans.Journaling.S3 provides an IJournalStorage implementation backed by Amazon S3 Express One Zone directory buckets.
The provider uses S3 Express append writes (WriteOffsetBytes) for WAL appends. For local development and tests against S3-compatible emulators such as MinIO, set UseS3ExpressAppend = false to use a conditional read-modify-write append emulation.
Buckets should be created ahead of time for AWS S3 Express One Zone. CreateBucketIfNotExists is intended for local emulators.