by Marco Tusa | May 4, 2021 | Insight for DBAs, MySQL, Percona Software
AKA Cluster Error Voting… What is Cluster Error Voting (CEV)? “Cluster Error Voting is a new feature implemented by Alexey Yurchenko, and it is a protocol for nodes to decide how the cluster will react to problems in replication. When one or several nodes have...
by Yves Trudeau | May 4, 2021 | Insight for DBAs, MySQL, Storage Engine
There is a common pattern in life, you often discover or understand things by accident. Many scientific discoveries fit such a description. In our database world, I was looking to see how BLOB/TEXT columns are allocated using overlay pages and I stumbled upon...
by Vinicius Grippa | Apr 28, 2021 | Insight for DBAs, MySQL, Percona Software
This blog post will show how to compile the Percona XtraBackup (PXB) tool for ARM. For this, we are going to use an AWS EC2 ARM instance with Ubuntu 20.04(Focal Fossa). The motivation for this was born in my interest in the new generation of ARM processors and if this...
by Przemysław Malkowski | Apr 28, 2021 | Insight for DBAs, Insight for Developers, MySQL, Percona Software
Multi-writer replication has been a challenge in the MySQL ecosystem for years before truly dedicated solutions were introduced – first Galera (and so Percona XtradDB Cluster (PXC)) replication (around 2011), and then Group Replication (first GA in 2016). Now,...
by Francisco Bordenave | Apr 27, 2021 | Insight for DBAs, MySQL
DBAs are important cogs in the availability, performance, and security of your data. Getting a great DBA is one of the most important things any company can do to ensure their database operations continue working without a problem. So how do you find great DBAs? In...
by Fernando Laudares Camargos | Apr 23, 2021 | Insight for DBAs, Insight for Developers, MySQL, Percona Software
Apologies for the silly title, but the issue is a real one, even though it is not a new thing. Schema upgrades are not an ordinary operation in Galera. For the subject at hand, the bottom line is: under the default Total Order Isolation (TOI) method, “the cluster...
by David Ducos | Apr 21, 2021 | Insight for DBAs, MySQL, Open Source
MySQL databases keep getting larger and larger. And the larger the databases get, the harder it is to backup and restore them. MyDumper has changed the way that we perform logical backups to enable you to restore tables or objects from large databases. Over the years...
by Sergey Pronin | Apr 20, 2021 | Cloud, MySQL, Percona Software
Percona Kubernetes Operators support various options for storage: Persistent Volume (PV), hostPath, ephemeral storage, etc. In most of the cases, PVs are used, which are provisioned by the Operator through Storage Classes and Persistent Volume Claims. Storage Classes...
by Sri Sakthivel | Apr 19, 2021 | Insight for DBAs, Insight for Developers, MySQL
MySQL Group Replication is a plugin that helps to implement highly available fault-tolerant replication topologies. In this blog, I am going to explain the complete steps involved in the below two topics. How to convert the group replication member to an asynchronous...
by Marco Tusa | Apr 15, 2021 | Insight for DBAs, MySQL, Percona Software
While I was working on my grFailOver POC, I have also done some additional parallel testing. One of them was to see how online DDL is executed inside a Group Replication cluster. The online DDL feature provides support for instant and in-place table alterations and...
by Marco Tusa | Apr 14, 2021 | Insight for DBAs, MySQL, Open Source, Percona Software
Where x is >= 22 😉 The Problem There are few things your data does not like. One is water and another is fire. Well, guess what: If you think that everything will be fine after all, take a look: Given my ISP had part of its management infrastructure on OVH, they...
by Marco Tusa | Apr 14, 2021 | Insight for DBAs, MySQL, Open Source, Percona Software
This blog provides high availability (HA) guidelines using group replication architecture and deployment recommendations in MySQL, based on our best practices. Every architecture and deployment depends on the customer requirements and application demands for high...
by Marcelo Altmann | Apr 12, 2021 | Insight for DBAs, Insight for Developers, MySQL, Percona Software
Chasing bugs can be a tedious task, and multi-threaded software doesn’t make it any easier. Threads will be scheduled at different times, instructions will not have deterministic results, and in order for one to reproduce a particular issue, it might require the...
by Michael Patrick | Apr 7, 2021 | MySQL, Open Source, Percona Services, Percona Software
So your MySQL server has crashed. What do you do now? When a server is down, in my opinion, there are two steps that are essential and both are extremely important and neither should be neglected: Save diagnostic information for determining the root cause analysis...
by Sergey Pronin | Apr 7, 2021 | Cloud, MongoDB, MySQL, Percona Software
Percona Kubernetes Operators allow users to simplify deployment and management of MongoDB and MySQL databases on Kubernetes. Both operators allow users to store backups on S3-compatible storage and leverage Percona XtraBackup and Percona Backup for MongoDB to deliver...
by Mike Benshoof | Apr 6, 2021 | MySQL, Percona Software, Storage Engine
As database footprints continue to explode, many companies are looking for ways to deal with such rapid growth. One approach is to refactor traditional relational databases to fit into a NoSQL engine, where horizontal scalability is easier. However, in many cases,...
by Sveta Smirnova | Apr 2, 2021 | Insight for DBAs, MySQL, Percona Software
Recovering to a particular time in the past is called Point-In-Time Recovery (PITR). With PITR you can rollback unwanted DELETE without WHERE clause or any other harmful command. PITR with Percona XtraBackup is pretty straightforward and perfectly described in the...
by Mike Benshoof | Apr 2, 2021 | Insight for DBAs, MySQL, Percona Services
Nobody likes change, especially when that change may be challenging. When faced with a technical challenge, I try to remember this comment from Theodore Roosevelt: “Nothing in the world is worth having or worth doing unless it means effort, pain, difficulty.” While...
by Mike Benshoof | Apr 1, 2021 | MySQL, Percona Software, Storage Engine
Percona Technical Account Managers get the privilege of working with some of our largest enterprise clients day in and day out. As such, we get to really focus on how to best leverage our technology to generate measurable benefits for our users. While it is fun to...
by Sergey Pronin | Apr 1, 2021 | Cloud, MySQL, Open Source, Percona Software
It is no secret that compute and storage costs are the main drivers of cloud bills. Migration of data from the legacy data center to the cloud looks appealing at first as it significantly reduces capital expense (CapEx) and keeps operational expenses (OpEx) under...
