Enhanced support for large transactions in Group Replication

MySQL 8.0.16 is out and it enhances Group Replication as usual. For example, the group_replication_exit_state_action system variable has a new default value, and members that the group expels can now automatically try to rejoin. This post presents a new feature MySQL 8.0.16 brings to Group Replication: message fragmentation. As you Continue Reading

Change group_replication_exit_state_action default option to READ_ONLY

In MySQL 8.0.16, the Group Replication plugin variable group_replication_exit_state_action default value has been changed to READ_ONLY. The group_replication_exit_state_action plugin variable was introduced in MySQL 8.0.12 to allow the user to configure how Group Replication behaves when a server instance leaves the group unintentionally. The group_replication_exit_state_action has following two values: ABORT_SERVER: Continue Reading

MySQL 8.0.16 Replication Enhancements

MySQL 8.0.16 has been released last Thursday. In it, you can find some new replication features. Here is a quick summary. Follow-up blog posts will provide details about these features. Large Messages Fragmentation Layer for Group Replication. Tiago Vale’s work, introduces message fragmentation to the Group Communication Framework. Group Replication’s Paxos Continue Reading

ReadySpace Maintenance

Update on Replication and Maintenancd

Dear customers, We are pleased to announce that replication work resulting from the recent storage issue has been completed. Normal service for all users should resumed by now. Should you encounter any residual effects like slowness, do let us know via helpdesk.readyspace.com and we will investigate further for you. Do Continue Reading

Group Replication – Consistent Reads Deep Dive

On previous posts about Group Replication consistency we: introduced consistency levels; explained how to configure the primary failover consistency; presented how to configure transaction consistency levels to achieve the consistency required by your applications. In blog 3. we presented the consistency levels: EVENTUAL, BEFORE, AFTER and BEFORE_AND_AFTER; their scopes: SESSION, Continue Reading

IPv6 support in Group Replication

In 8.0.14, we add to Group Replication (GR) the ability to use IPv6 in all of its network-related configuration parameters. This means that now you can take advantage of this technology and “rock” those billion addresses using MySQL Group Replication. What’s New When you operate a Group Replication group, some Continue Reading

Fail early, fail fast – preventing stale reads on a member that dropped out of the group!

In Group Replication, starting with MySQL 8.0.12, the user is able to specify the behavior for members that enter an error state. The member can either shoot itself on the head or set itself to read-only. But what does that mean in practice? This blog post will give you a Continue Reading

Server version in the binary log

Replication topologies, whether master-slave or group replication setups, may be composed of servers using different MySQL versions. In MySQL 8.0.14, each transaction’s immediate and original server versions are now visible in the binary log as session variables. These two new variables, fully managed by the replication infrastructure, are used to Continue Reading

Group Replication now interacts with the Group Communication Engine more efficiently

MySQL 8.0.14 comes with a plethora of new features. Some of the new Group Replication features have user–facing options, some impact user-facing options, and others stay completely under the hood. This post will present one of the under-the-hood changes in MySQL 8.0.14: the way the Group Replication layer interacts with Continue Reading

Group Replication – Consistency Levels

The MySQL Group Replication (GR) feature is a multi-primary update anywhere or single-primary replication plugin for MySQL with built-in conflict detection and resolution, automatic distributed recovery, and group membership. Its goal it is to make high-availability (HA) simple with off-the-shelf hardware, not only to new applications but also existing ones Continue Reading

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