Author - Przemysław Malkowski

Flashback: Another Take on Point-In-Time Recovery (PITR) in MySQL/MariaDB/Percona Server

Point-In-Time Recovery

In this blog post, I’ll look at point-in-time recovery (PITR) options for MySQL, MariaDB and Percona Server for MySQL.
It is a common good practice to extend data safety by having additional measures apart from regular data backups, such as delayed slaves and binary log backups. These two options provide the ability to restore the data […]

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How to Handle pt-table-checksum Errors

pt-table-checksum Errors

In this blog post, we’ll look at how to approach pt-table-checksum errors.
pt-table-checksum is one of the most popular tools in Percona Toolkit, and it is widely used to identify data differences between masters and slaves. Therefore, as Percona Support Engineers we have customers often asking questions related to the pt-table-checksum errors and warnings produced. […]

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Synchronous Replication in MySQL: Galera vs. Group Replication

Group Replication

UPDATE: Some of the language in the original post was considered overly-critical of Oracle by some community members. This was not my intent, and I’ve modified the language to be less so. I’ve also changed the term “synchronous” (which the use of is inaccurate and misleading) to “virtually synchronous.” This term is more accurate […]

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WAN Synchronous Clusters: Dealing with Latency Using Concurrency

WAN Latency

In this blog, we’ll discuss how to use concurrency to help with WAN latency when using synchronous clusters.
WAN Latency Problem
Our customers often ask us for help or advice with WAN clustering problems. Historically, the usual solution for MySQL WAN deployments is having the primary site in one data center, and stand-by backup site in another […]

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Don’t Let a Leap Second Leap on Your Database!

Leap Second

This blog discusses how to prepare your database for the new leap second coming in the new year.
At the end of this year, on December 31, 2016, a new leap second gets added. Many of us remember the huge problems this caused back in 2012. Some of our customers asked how they should prepare for this year’s event […]

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