As indicated in a previous post, I am working on Planet [for the] MySQL Community for which I did a RFC on the Requirements.  I am happy to announce the beta release of Planet [for the] MySQL Community using the Planet Pluto Free Feed Reader and (Static) Website Generator.  If you are in a hurry, you can check it out at https://planet-beta-pluto.oursqlcommunity.org/.  This post

This post was remaining in stand-by for a long time, specially that I was expecting that observed issues will be fixed soon. But time is going, and the problems are remaining. And I'm constantly asked "why, Dimitri, you're suggesting now to use XFS, while in the past you always suggested EXT4 ??" -- hope the following article will clarify you the "why" and maybe motivate you to do your own evaluations to see how well the things are working for you on your own systems under your own workloads..

NOTE : this will also clarify why the new Double Write did not appear in MySQL 8.0 in 2018, as it was planned, but only recently (http://dimitrik.free.fr/blog/posts/mysql-80-perf-new-dblwr.html)

Read more... (6 min remaining to read)

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 …

Percona Live Online Agenda Slot: Tue 19 May • New York 11:00 a.m. • London 4:00 p.m. • New Delhi 8:30 p.m.

Abstract

I will talk about the latest improvements in MySQL 8.0.20 and the MySQL Engineering Team’s steady progress with MySQL 8.0. These include solutions like Document Store, InnoDB Cluster, and InnoDB ReplicaSet where MySQL Router and MySQL Shell are playing an important role. All of these Oracle solutions are completely open source.

Why is your talk exciting?

This talk is exciting because we will be looking at all the latest features in MySQL 8.0 Sadly my time will be probably too short to detail them all and cover the open source code contributions we’ve received from users.

Who would benefit the most from your talk?

All MySQL users would benefit, whether newbies or veterans. You would be …

DBA can configure user accounts such that too many consecutive login failures cause temporary account locking.

The post MySQL Security - Failed-Login Tracking and Temporary Account Locking first appeared on dasini.net - Diary of a MySQL expert.

As indicated in a previous post, I am working on a Planet MySQL Community (this name is not final, see below).  In this post, I want to present what I think the requirements should be for this new aggregator.  This is a Request for Comment (RFC): I do not claim completeness nor perfection, this might (will) evolve, and your remarks are welcome.  A tl&dr is available in the

MinervaDB Webinar – Building MySQL Infrastructure for Performance and Reliability

This is a webinar from Shiv Iyer ( Founder and Principal of MinervaDB ). He is a longtime ( 16 years ) Database Infrastructure Operations Architect with core expertise in performance, scalability and Database SRE in Open Source Database Systems. If you are building MySQL for Performance and Reliability, You must attend this webinar. Shiv explains in detail on how he and the team MinervaDB has built several planet-scale database infrastructure operations for high profile internet properties / companies from diversified verticals like CDNs, Mobile Ad. Networks, Social Media Applications, Online Commerce, Social Media Gaming and FinTech. This webinar is about  building best practices and checklist for MySQL performance, capacity planning / sizing, scalability, high availability, fault-tolerance, observability & resilience and database security. You can …

The authentication, the first level of security for each IT system, is the stage to verify the user identity through the basic username and password scheme. It is crucial to have a mechanism to protect and secure password storing and transmitting over network.

In MySQL, there is plenty of different authentication methods available, and last versions improved the security of this concept.

At the beginning, the mechanism, called mysql_old_password, was pretty insecure: it’s based on a broken hashing function and the password is 16 bytes long. It was not so complex for attackers to find a plaintext password from the hash stored in the password column of …

The authentication, the first level of security for each IT system, is the stage to verify the user identity through the basic username and password scheme. It is crucial to have a mechanism to protect and secure password storing and transmitting over network.

In MySQL, there is plenty of different authentication methods available, and last versions improved the security of this concept.

At the beginning, the mechanism, called mysql_old_password, was pretty insecure: it’s based on a broken hashing function and the password is 16 bytes long. It was not so complex for attackers to find a plaintext password from the hash stored in the password column of …