Native streaming replication in PostgreSQL works only between servers running the same major version. We discussed about logical replication in our previous blog post. In that post, we saw how logical replication could help us set up migration between two different PostgreSQL versions. However, logical replication works only for the currently supported versions of […]Read more
When you need to upgrade PostgreSQL, there are a variety of approaches that you can use. To avoid application downtime, then not all of the options to upgrade postgres are suitable. When avoiding downtime is essential, then you might consider using replication as a means of upgrade, and depending on your scenario, you can […]Read more
Recently, we had an edge case where a MySQL slave went out-of-sync but it couldn’t be rebuilt from scratch. The slave was acting as a master server to some applications and it had data was being written to it. It was a design error, and this is not recommended, but it happened. So how do […]Read more
Parallel replication has been around for a few years now but is still not that commonly used. I had a customer where the master had a very large write workload. The slave could not keep up so I recommended to use parallel slave threads. But how can I measure if it really helps and […]Read more
GTID replication has made it convenient to setup and maintain MySQL replication. You need not worry about binary log file and position thanks to GTID and auto-positioning. However, things can go wrong when pointing a slave to a different master. Consider a situation where the new master has executed transactions that haven’t been executed […]Read more
Please join Percona’s Chief Evangelist Colin Charles on Thursday, June 28th, 2018, as he presents Securing Database Servers From External attacks at 7:00 AM PDT (UTC-7) / 10:00 AM EDT (UTC-4).
A critical piece of your infrastructure is the database tier, yet people don’t pay enough attention to it judging by how many are […]
In this blog post, we’ll look at how to turn on binlog encryption in Percona Server for MySQL.
Why do I need this?
As you probably know, Percona Server for MySQL’s binlog contains sensitive information. Replication uses the binlog to copy events between servers. They contain all the information from one server so that it can be […]
In this blog post, we’ll discuss migrating data from encrypted Amazon MySQL RDS to encrypted Amazon Aurora.
One of my customers wanted to migrate from an encrypted MySQL RDS instance to an encrypted Aurora instance. They have a pretty large database, therefore using mysqldump or a similar tool was not suitable for them. They also wanted to setup […]
In this blog post, we’ll look at some of the MySQL high availability solution options.
In the previous post of this series, we looked at the MySQL high availability (HA) solutions that have been around for a long time. I called these solutions “the elders.” Some of these solutions (like replication) are heavily used today […]
In this blog post, I’ll talk about multi-threaded slave statistics printed in MySQL error log file.
MySQL version 5.6 and later allows you to execute replicated events using parallel threads. This feature is called Multi-Threaded Slave (MTS), and to enable it you need to modify the
slave_parallel_workers variable to a value greater than 1.
Recently, a few […]