GridGain 9.0.3 Release Notes
Overview
GridGain 9.0.3 is focused on improving CLI reporting and cluster performance.
New Features
Incremental Snapshots
With this release, you can make incremental snapshots. Incremental snapshots automatically find the previous snapshot for the specified tables and create a snapshot of all data since that point of time. For example:
cluster snapshot create --type=full --all
....
cluster snapshot create --type=incremental --all
Table Sequences
With this release, you can create a sequence that will be incremented or decremented automatically. These sequences can then be used to automatically fill the column in your tables.
To use sequences, create them with the SQL CREATE SEQUENCE
command and then use sequence functions
CREATE SEQUENCE IF NOT EXISTS defaultSequence; CREATE TABLE IF NOT EXISTS Person ( id bigint default NEXTVAL('defaultSequence') primary key , city_id bigint, name varchar, age int, company varchar ); INSERT INTO Person (city_id, name, age, company) values (1, 'John', 30, 'newCorp'), (2, 'Jane', 24, 'oldCorp')
Cache Expiry
Expiry policies can now also be configured for caches. You can create the ttl
column and use the EXPIRE AT
clause to remove the rows at the specified time:
CREATE CACHE Accounts (
accountNumber INT PRIMARY KEY,
firstName VARCHAR,
lastName VARCHAR,
balance DOUBLE,
ttl timestamp DEFAULT CURRENT_TIMESTAMP + INTERVAL '2' HOURS
) WITH PRIMARY_ZONE = 'CACHES' EXPIRE AT ttl;
Improvements and Fixed Issues
Issue ID | Category | Description |
---|---|---|
IGN-25261 |
Platforms and Clients |
.NET: Tuples no longer require to have columns in the same order to be considered equal. |
IGN-25173 |
Distributed Computing |
Added TaskDescriptor to Compute API. |
IGN-25113 |
SQL |
Added support for FORMAT clause of CAST operator. |
IGN-25019 |
Platforms and Clients |
.NET: Fixed host name support in ClusterNode.Address. |
IGN-24717 |
General |
Improved error message when trying to connect to uninitialized cluster. |
IGN-24446 |
Distributed Computing |
.NET: Added MapReduce Compute API. |
IGN-24329 |
Platforms and Clients |
Fixed an issue with key-value API not working with tables that have a single column. |
IGN-21178 |
Platforms and Clients |
CPP: Added TLS support in C++ clients. |
IGN-21176 |
SQL |
Fixed an issue that caused a new row to be inserted instead of updating an existing row. |
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
-
Tracing
-
Service Grid
-
Write-Behind Caching
We Value Your Feedback
Your comments and suggestions are always welcome. You can reach us here: https://gridgain.freshdesk.com/support/login.
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