[Roadmap] Planning 1.0 Release

[wuchong]

Timeline Plan

• Feature Freeze: June 1, 2026
• Release: June 15, 2026

Milestone Board

https://github.com/apache/fluss/milestone/6

Highlight Features

List of features announced by contributors and committers that are likely to be ready for the feature freeze

Log Table

• 🚨 P0: Rescale Bucket: FIP-14 @LiebingYu
• 🚨 FIP-10: Support Log RecordBatch Filter Pushdown [Umbrella] Support Log RecordBatch Filter Pushdown #2494 @platinumhamburg

PK Table

• 🚨 Global Secondary Index @platinumhamburg
• Support Full KV Scan for Primary Key Tables: Umbrella FIP-17 @polyzos

Streaming Lakehouse

• FIP-27: Remove 3 system columns
• FIP-28: Improve historical Partition Support for Fluss Datalake-Enabled Tables
• Enable Union Read on Lakehouse Catalog (e.g., Iceberg REST Catalog) @luoyuxia
• Enable LakeStream on the existing lake table @luoyuxia

Storage

• FIP-25: Multi-Location for Remote Storage
• Multi-Disk for Local Storage
• Variant data type

Cluster Operations

• Coordinator HA: [Feature] CoordinatorServer Supports High-Available #188 @zcoo

Security

• FIP-29: Add TLS Support
• FIP-7: Support Kerberos vis SASL/GSSAPI

Stabilities

• 🚨 P0: [client] Refactor metadata cache and async updating mechanism and retry mechanism in client side #483 @wuchong
• Use Leader Epoch rather than High Watermark for Truncation #673
• Remove TableInfo from server MetadataCache #982
• [Umbrella] Add backward and forward compatibility E2E tests #1161

Flink Connector

• Support Flink 2.3 with Multi-Stream Delta Join (will be released in May)

Spark Connector

• Union Read support

Filesystems

• GFS: Implement obtainSecurityToken for google filesystem #993
• MiniO: [File system] Add AssumeRoleWithWebIdentity STS functionality for temporary credentials to S3 file system to support MinIO #621
• RustFS: Support obtain sts token from rustfs #2661

Others

• [metrics] OpenTelemetry metric reporter #181

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We welcome any ideas, suggestions, or feedback from the community! Your input is invaluable in shaping the future of Fluss. Please feel free to comment on the discussion and linked issues.

[affo]

For filesystem, I would like to address this one: #2662.
Similarly, I think there may be a similar one for Azure Gen2 🤝

[michaelkoepf]

I'd like to push for a PR review of the OTEL collector, as it has been postponed for a long time and application observability is a crucial feature for enterprise software.

[MehulBatra]

Lakehouse items:

• Document/Guide : To support different catalogs (Polaris/Glue/Hive/Lakekeeper) with Iceberg
• Iceberg v3 support with Equality deletes then eventually via Positional Deletes
• Deletion Vector Support proposal startup
• Spark batch union read (log table) (Iceberg Speicifc)
• Schema evolution (Add column) (Iceberg Specific)

[XuQianJin-Stars]

For filesystem, [FLUSS-2686] Add COS filesystem support: #2836

[fresh-borzoni]

I've been working on Spark union read support for log tables.
Draft PR is at #2956, planning to followup with KV, streaming, DV support to close the gap with flink UR .

Happy to own this for 1.0.