Percona has enforced stronger security in Percona XtraDB Cluster (PXC) 8, but this requires some attention during the rollout of the new server version, so let see the why and what.

In PXC there are two different kinds of traffic: client-server exchange (ie: application traffic), and replication traffic. The latter refers to any SST/IST, write-set, and other service messages the nodes exchange.

In PXC 5.7 it is possible to activate SSL encryption by enabling the variable pxc-encrypt-cluster-traffic by following the instructions.

In PXC 8, we choose to enable encryption by default on all replication traffic, to have the highest out-of-box security enforcement.

While this is an obvious …

During this webinar, Tyler Duzan, Product Manager for MySQL and Cloud at Percona, will discuss Percona’s decision to delay Percona XtraDB Cluster 8.0 to ship it with Galera 4 instead of Galera 3, and why that matters. In addition, he’ll talk about the work done to integrate MySQL 8.0 features with Galera as well as how Percona is treating Kubernetes as one of its primary target platforms with this release. This webinar will provide an overall view of the current state of best-in-breed MySQL clustering as well as the Percona roadmap for the future.

Please join Tyler Duzan of Percona, on Tuesday, May 26 at 11 am EDT for his webinar “What’s New in Percona XtraDB Cluster (PXC) 8.0?”.

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Percona XtraDB Cluster 8.0 comes with an upgraded Galera 4.0 library, which provides a new feature – streaming replication. Let’s review what it is and when it might be helpful.

Previous versions of Percona XtraDB Cluster with Galera 3.x had a limitation in how big transactions are handled.

Let’s review the performance under sysbench-tpcc workload when in parallel we update a big update on a table that is even non-related to the tables in the primary workload.

Without Streaming Replication

Let’s run two workloads.

1. sysbench-tpcc workload with 1 sec resolution
2. In parallel run UPDATE oltp.sbtest SET k=k+1 LIMIT 1000000

Running update:

mysql> update sbtest1 set k=k+1 limit 1000000;
Query OK, 1000000 rows affected (34.48 sec)
Rows matched: 1000000  Changed: …

I was testing the latest Percona XtraDB Cluster 8.0 (PXC) release which has the Galera 4 plugin, and I would like to share my experiences and thoughts on the Streaming Replication feature so far.

What Is Streaming Replication, in One Sentence?

In Galera 4, the large transaction could split into smaller fragments, and even before it got committed these fragments have been replicated to the other nodes and have already started the certification and apply process.

The manual describes all the pros and cons, but let’s see how it works. I have created a table with 10M rows and I am going to run some large updates on that.

First I have run the updates without Streaming Replication, and because it is disabled by …

pt-online-schema-change emulates the way that MySQL alters tables internally, but it works on a copy of the table you wish to alter. It executes INSERT statements to import the data, that runs in a single connection to fill the new table. In this repository, there is a script called myloader_pt-osc.sh that uses myloader to execute parallel INSERTs, instead of using pt-online-schema-change internal tooling, but it also uses a patched version of pt-online-schema-change.

Patch pt-online-schema-change

There are 2 changes that we needed to perform on pt-online-schema-change:

1- Be able to stop the execution after the copy of the table is created
2- Tell pt-online-schema-change that no data needs to be imported

We are …

As a Solutions Engineer at Percona, one of my responsibilities is to support our customers as they investigate new and emerging technologies. This affords me the opportunity to speak to many current and new customers who partner with Percona.

The topic of Kubernetes is becoming more popular as companies are investigating and adopting this technology. The issue most companies are encountering is having a stateful database that doesn’t fall victim to an environment tuned for ephemeral workloads. This obviously introduces a level of complexity as to how to run a stateful database in an inherently stateless world, as databases are not natively designed for that.

To make your life easier, as a part of the Percona Cloud-Native Autonomous Database Initiative, our engineering teams have built a …

As Alkin and Ramesh have shown us in their Testing Percona XtraDB Cluster 8.0 with DBdeployer post, it is now possible to easily deploy an environment to test the features provided by the brand new release of Percona XtraDB Cluster 8.0.

We have also worked on creating a testing environment available for those that use Vagrant instead. Be it that it’s what you are used to working with, or that you want a proper VM for each instance, in particular, you can use the following commands to easily deploy a three-node cluster.

Requirements

Vagrant runs in Linux, Mac OS, and Windows, you just need to have the packages installed. Visit …

In this day and age, large enterprise companies make use of Ansible, Puppet, or Chef to provision MySQL servers, be it replica sets or clusters. This eases the burden of deployment and workflow management.

However, for some smaller companies, the learning curve hampers the immediate adoption of automation software. This is where the MySQL Shell helps, by allowing you to deploy an N-node InnoDB Cluster or ReplicaSet in less than 60 lines of code.

The Requirements

• Percona Server for MySQL version 8.0.17 or later, preferable version 8.0.19, each node started as standalone servers
• Percona MySQL Shell 8.0 or equivalent upstream version
• MySQL root user and password or equivalent user with grant option
• Hostname configured on each node, can be done with …

In the light of support for Percona XtraDB Cluster (PXC), the DBdeployer anniversary, and the newly released Percona XtraDB Cluster 8.0, I’m happy to announce that Giuseppe Maxia has recently updated DBdeployer to support Percona XtraDB Cluster 8.0.

We at Percona, with my colleague Ramesh Sivaraman, have tested and deployed Percona XtraDB Cluster (PXC) 8.0.18  successfully using DBdeployer.

What is DBdeployer and How Do You …

April 29, 2020 – Percona is pleased to announce the release of Percona XtraDB Cluster 8.0. This release, based on Percona Server for MySQL 8.0 and Galera 4, brings together the best features of these and other products to deliver an open-source high availability MySQL solution that helps enterprises minimize unexpected downtime and data loss, improve data security, and ensure data integrity of your database environments supporting your critical business applications in the most demanding public, private, and hybrid cloud environments.

Percona XtraDB Cluster 8.0 enables enterprises to improve data security and ensure data integrity with new encryption and streaming replication features. …