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GridGain 9.0.1 Release Notes

GridGain 9.0.1 improves cluster stability and performance and adds continuous query metrics for Java and .NET clients.

Overview

GridGain 9.0.1 is the update focused on improving cluster stability and performance.

New Features

Continuous Query Client Metrics

In this release, client metrics for Java and .NET clients were expanded with support for continuous query metrics. You can use these metrics to track the number of received continuous query events received and sent.

For Java clients, make sure to enable metrics in configuration:

IgniteClient.builder().metricsEnabled(true)

You can then use the standard JMX monitoring tools to track metrics.

For .NET clients, the metrics are exposed automatically and can be tracked without client modifications.

Improvements and Fixed Issues

Issue ID
Category
Description

GG-39932

General

Fixed possible issues with cluster initialization with invalid license.

GG-39918

General

Reduced the time required to initialize the cluster in embedded mode.

GG-39918

CLI

Fixed some CLI commands missing --profile parameter in non-REPL mode.

GG-39608

General

Improved error messages for user create command.

GG-39058

Clients

.NET: Added continuous query metrics.

GG-39057

Clients

Java: Added continuous query metrics.

GG-38799

Storage

Added support for RANDOM eviction mode.

GG-38716

Data Center Replication

Added information on current progress of data center replication to the status command output.

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 upcoming versions.

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: http://support.gridgain.com/.

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