I am finalizing my Percona Live talk MySQL and Vitess (and Kubernetes) at HubSpot. In this talk, I mentioned that I like that Percona is providing better MySQL with Percona Server. This comes with a little inconvenience though: with improvements, sometimes comes regression. This post is about such regression and a workaround I implemented some time ago (I should have shared it
May
22
2023
May
22
2023
Welcome to the OpenLampTech developer newsletter. Thank you so much for reading each week. I am bringing you the media source for PHP, MySQL, and the LAMP stack you can depend on.
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The Newsletter for PHP and MySQL Developers
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I am sharing so many good articles this week in OpenLampTech issue #79. Visit those …
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May
18
2023
Explore the powerful features of Aurora Serverless V2 for MySQL in this informative blog series. Learn about read-only scaling, parameter support, and cost performance. Compare costs between Provisioned Aurora and Aurora Serverless V2. Discover key takeaways for optimizing your MySQL deployment on the cloud. Read now!
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May
17
2023
The SQL language provides a lot of effective operators for retrieving and presenting data from databases. One popular tool is the UNION clause. In this article, we will delve into what the UNION clause is, its benefits, and how to use it effectively in MySQL.
The post MySQL UNION Explained: A Tutorial with Practical Examples for All Skill Levels appeared first on Devart Blog.
May
16
2023
As a database administrator, have you ever been in a situation when your database confronted a brute force attack? A brute force attack can be launched against a user account in MySQL. MySQL replies with success or error based on supplied credentials, and the time required for the verification is almost the same in either case. Hence, an attacker can launch a brute force attack against a MySQL user account at a rapid rate and can try many different passwords.
According to cryptography, a brute-force attack consists of an attacker trying many passwords or passphrases with the hope of eventually guessing correctly. The attacker systematically checks all possible passwords and passphrases until the correct one is found.
It’s not just brute force attacks going on; the IT industry has recently seen a steady increase in distributed denial of service (DDoS) attacks. Have you also been targeted in such a type of connection flow on port …
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May
16
2023
At the end of 2021, I pushed the first Docker image to hub.docker.com. This was the first official image and since then, we have been improving our testing and packaging procedures based on Docker, CircleCI, and GitHub Actions. However, when I’m coding, I’m not testing in Docker. But a couple of weeks ago, when I was reviewing an issue, I realized some interesting Docker use cases that I want to share.
Common use case
First, we are going to review how to take a simple backup with MyDumper to warm you up:
docker run --name mydumper
--rm
-v ${backups}:/backups
mydumper/mydumper:v0.14.4-7
sh -c "rm -rf /backups/data;
mydumper -h 172.17.0.5
-o /backups/data
-B test
-v 3
-r 1000
-L /backups/mydumper.log"
You will find the backup …
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May
15
2023
Historically MySQL is great in horizontal READ scale. The scaling, in that case, is offered by the different number of Replica nodes, no matter if using standard asynchronous replication or synchronous replication.
However, those solutions do not offer the same level of scaling for writes operation.
Why? Because the solutions still rely on writing in one single node that works as Primary. Also, in the case of multi-Primary, the writes will be distributed by transaction. In both cases, when using virtually-synchronous replication, the process will require certification from each node and local (by node) write; as such, the number of writes is NOT distributed across multiple nodes but duplicated.
The main reason behind this is that MySQL is a relational database system (RDBMS), and any data that is going to be written in it must respect the RDBMS …
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May
15
2023
I can’t express how grateful I am that you are here reading OpenLampTech each week. But, I’ll try anyway. Thank you! On to this week’s excellent content
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The Newsletter for PHP and MySQL Developers
Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.
OpenLampTech issue #78 has content featuring:
- MySQL backup tools you might not have heard of …
May
15
2023
Discover how to troubleshoot a MySQL replica IO thread stuck in a connecting state. Learn about the replication architecture, security group rules for AWS EC2 instances, and how to address common issues like network restrictions and bind address configuration.
MySQL is a powerful database management and a widely used cloud database service. One of its key features is the ability to create replicas of a master database to improve its availability and scalability. However, at times the IO thread in a MySQL replica may get stuck in a connecting state, which can cause replication issues and affect the overall data consistency …
[Read more]
May
12
2023
Amazon claims that Aurora has “Up to 5X the throughput of MySQL”. Is it true? It wasn’t easy to find the truth, but I kept digging until I found it. This is a long read; let’s chase the rabbit all the way down the hole.