> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/release-notes/gridgain-9/release-notes_9.0.6.md). # GridGain 9.0.6 Release Notes GridGain 9.0.6 is a stability and performance release that adds a license metrics exporter. ## Overview GridGain 9.0.6 is a release dedicated to stability and performance. ## New Features ### License Metrics In this release, a new `license` metrics exporter was added. You can use it to check the details of the current license. ## Improvements and Fixed Issues | Issue ID | Category | Description | | --------- | ----------------------------------- | -------------------------------------------------------------------------------------------------------------------------- | | IGN-25466 | General | Linux and Windows environment files are now consistent. | | IGN-25409 | General | Lease duration is now configurable in cluster configuration. | | IGN-25362 | Cluster Storage Engine | Improved stability of transactions that are run in parallel. | | IGN-25351 | SQL | SQL AVG function now returns DECIMAL data type for exact numeric types and DOUBLE data type for approximate numeric types. | | IGN-24870 | CLI Tool | Improved SQL script results processing in CLI tool. | | IGN-24056 | Platforms and Clients | .NET: Fixed decimal cast precision loss in LINQ. | | GG-40548 | Cluster SQL Engine | Updated awssdk to version 2.25.21. | | GG-40530 | CLI Tool | You can now specify several source cluster addresses for DCR. | | GG-40434 | Cluster Data Snapshots and Recovery | Fixed an issue with restoring indexes when snapshot is restored. | | GG-39823 | Licenses | Added metrics for licenses. | | GG-39752 | CLI Tool | COPY INTO command now properly handles invalid parameters. | ## Known Limitations ### Delay on DDL Requests DDL requests, such as `CREATE TABLE`, take a few seconds each to complete. Because of that, large database initialization scripts may take longer than expected. This will be addressed in an upcoming release. ### Performance of GridGain 8 Applications Some scenarios may see lower performance when moving to GridGain 9. This is a temporary limitation, and the performance in these scenarios will be improved in upcoming versions. ### High-Availability with Two Data Copies When a partition loses majority of its copies, it becomes unavailable. This behavior is required for split-brain protection. Because of this, in a distribution zone with 2 data replicas, losing one node may lead to partial unavailability. To achieve both split-brain protection and full availability with one node down, use 3 or more replicas. Upcoming versions will add a high-availability mode that support full availability with one node down when using 2 replicas. ### Data Center Replication with Multiple Data Centers Complex Data Center Replication topologies (for example, the ones involving cycles) of 3 or more data centers are not supported. This will be addressed in an upcoming release. ### GridGain 8 Features The following features of GridGain 8 are not available in this version, and will be added in upcoming versions: * Rack-Awareness * SQL Offloading * Tracing * Service Grid * Write-Behind Caching ## We Value Your Feedback Your comments and suggestions are always welcome. You can reach us here: .