GridGain 9.0.2 Release Notes
Overview
GridGain 9.0.2 is focused on improving CLI reporting and cluster performance.
New Features
Support for SQL Partition Filter
In this release, a system __part column was added to tables. You can use this column to perform SELECT operations on a specific partition, for example:
SELECT city_id, id FROM Person WHERE '__part'=23;Improvements and Fixed Issues
| Issue ID | Category | Description |
|---|---|---|
GG-39947 |
CLI |
Improved CLI error message for uninitialized cluster. |
GG-39939 |
Licenses |
License signature is now obscured in cluster configuration. |
GG-39814 |
CLI |
Tables argument is now optional for dcr stop command. |
GG-39812 |
CLI |
Improved dcr create command error. |
GG-39769 |
General |
Updated rocksdbjni from version 8.11.3.1 to 9.2.1.1. |
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 read-only. 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
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Tracing
-
Service Grid
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Write-Behind Caching
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