In this series of blogs I will do my best to demonstrate how to set up and run Cluster in Cloud environment by hand and by utilizing MCC. For detailed configuration, I will use MCC (Auto-installer). Some of the information regarding this setup is provided in post by Mikael. Information regarding Auto-installer is available in our documentation, HTML help files in share/MCC distribution directory and in my blog post.

Cloud setup It might come as surprise but for initial testing any instance should do. I started with 1CPU/1GB RAM ones. The target topology was:

• Host #1: Management node and Cluster client tools.
• Host #2: Multi-threaded DATA node. …

We are are an vendor neutral and independent open source database technologies consulting, support and remote DBA services provider with several customers using MySQL GA, MySQL Enterprise, InnoDB/XtraDB, Percona Server, MariaDB, MyRocks and ClickHouse. The customers continue doing business with us for being an technology / vendor agnostic company. We spend considerable amount of time doing research on open source database technologies, Often customers ask us about the performance comparison between InnoDB and MyRocks so we decided to write this post to compare performance between InnoDB (MySQL 8.0) and MyRocks (MariaDB 10.3.7) using Sysbench 1.0.14:

Software Infrastructure we have used for this benchmarking : 

MySQL 8.0 / InnoDB  (no custom tuning done for performance)

[root@localhost sysbench]# cat /etc/redhat-release 
CentOS Linux release 7.3.1611 (Core) …

MySQL Cluster 7.6 is now released as GA. 7.6 contains a lot of interesting changes.
Here is a list of changes in numbers in the recent MySQL Cluster versions.

1) With the new changes of our checkpointing scheme the restart times in MySQL
Cluster are 3-4x faster for a database size of around 60 GByte.

2) The changes we have done in our parallel query execution parts have improved
some benchmark queries we have tested with up to a factor of 2.

3) A new wakeup threads in the NDB API means that each API node can deliver 10%
more throughput.

4) 7.6.6 introduces a new shared memory transporter to communicate between
colocated MySQL Server and NDB data nodes. This improves throughput by 10% and
can improve throughput on low thread counts as much as 60%.

5) Benchmarks using the Read Backup feature (released in 7.5) shows that
…

MySQL 8.0.11 comes with a catalog of 5108 spatial reference systems (SRSs). 4628 projections (flat maps), 479 geographic (ellipsoidal) representations of Earth, and one Cartesian all-purpose abstract plane (SRID 0). And if for some reason that isn’t enough, we can create our own.…

You may have heard about the term “split brain”. What it is? How does it affect your clusters? In this blog post we will discuss what exactly it is, what danger it may pose to your database, how we can prevent it, and if everything goes wrong, how to recover from it.

Long gone are the days of single instances, nowadays almost all databases run in replication groups or clusters. This is great for high availability and scalability, but a distributed database introduces new dangers and limitations. One case which can be deadly is a network split. Imagine a cluster of multiple nodes which, due to network issues, was split in two parts. For obvious reasons (data consistency), both parts shouldn’t handle traffic at the same time as they are isolated from each other and data cannot be transferred between them. It is also wrong from the application point of view - even if, eventually, there would be a way to sync the data (although …

It gives us great pleasure to announce that the 7.6 release of MySQL Cluster is now ready for prime time.

MySQL Cluster is the distributed database combining linear scalability and high availability. It provides in-memory real-time access with transactional consistency across partitioned and distributed datasets designed for mission critical applications.…

Percona announces the GA release of Percona Server for MySQL 5.7.22-22 on on May 31, 2018. Download the latest version from the Percona web site or the Percona Software Repositories. You can also run Docker containers from the images in the Docker Hub repository.

Based on MySQL 5.7.22, including all the bug fixes in it, Percona Server for MySQL 5.7.22-22 is the current GA release in the Percona Server for MySQL 5.7 series. Percona …

A data lake is “…a method of storing data within a system or repository, in its natural format, that facilitates the collocation of data in various schemata and structural forms…”1. Many companies find value in using a data lake but aren’t clear that they need to properly plan for it and maintain it in order to prevent issues.

The idea of a data lake rose from the need to store data in a raw format that is accessible to a variety of applications and authorized users. Hadoop is often used to query the data, and the necessary structures for querying are created through the query tool (schema on read) rather than as part of the data design (schema on write). There are other tools available for analysis, and many cloud providers are actively developing additional options for creating …

The schema changes in production can cause lock at time and makes the slave to lag. It is more tedious and troublesome with PXC ( Galera ) cluster which can be made smoother with Percona online schema change.

Image Courtesy : Photo by Andrew Ruiz on Unsplash

Let us show you how to install MySQL on your CentOS 7 server. MySQL is a relational database management system ...

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