davidradl commented on code in PR #27489:
URL: https://github.com/apache/flink/pull/27489#discussion_r2740938034
##########
docs/content/docs/ops/state/disaggregated_state.md:
##########
@@ -204,4 +204,25 @@ Default is true. Setting this to false will raise the CPU
usage.
- `state.backend.forst.executor.inline-coordinator`: Whether to let task
thread be the coordinator thread.
Default is true. Setting this to false will raise the CPU usage.
+{{< hint info >}}
+`ForStStateBackend` utilizes [ForSt](https://github.com/ververica/ForSt/) as
its underlying database core.
+The current iteration of ForSt is forked from
[frocksdb](https://github.com/ververica/frocksdb),
+architected as an embedded database core specifically for Flink local state
management.
+
+While transitioning the db toward a disaggregated architecture, we encountered
significant
+architectural and engineering constraints within the existing framework.
+To address these challenges, we are now actively developing a next-generation,
+cloud-native ForSt DB written in Rust.
+
+#### Key Advantages of the New ForSt DB:
+- Architectural Simplicity: A streamlined codebase designed for high
extensibility.
+- Stream-Native Design: Optimized specifically for the unique demands of
large-scale stream processing.
+- Cloud-Native: Built from the ground up to support disaggregation.
+
+#### Roadmap & Maintenance:
+- Release Schedule: The first stable open-source version is projected for
August 2026.
+- Deprecation Notice:As we shift our focus to the new Rust-based
implementation, the frocksdb-based version of ForSt is no longer under active
development and will be phased out (deprecated) following the new release.
Review Comment:
I am curious - are you looking at something like
[https://github.com/apache/arrow-rs](https://github.com/apache/arrow-rs) or
writing from scratch?
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