The latest from the MySQL community

The innodb_io_capacity and innodb_io_capacity_max are often misunderstood InnoDB parameters. As consultants, we see, at least every month, people setting this variable based on the top IO write specifications of their storage. Is this a correct choice? Is it an optimal value for performance? What about the SSD/Flash wear leveling?

Innodb_io_capacity 101

Let’s begin with what the manual has to say about innodb_io_capacity:

“The innodb_io_capacity variable defines the number of I/O operations per second (IOPS) available to InnoDB background tasks, such as flushing pages from the buffer pool and merging data from the change buffer.“

What does this mean exactly? …

Andreas Andreakis, Ioannis Papapanagiotou

Overview

Change-Data-Capture (CDC) allows capturing committed changes from a database in real-time and propagating those changes to downstream consumers [1][2]. CDC is becoming increasingly popular for use cases that require keeping multiple heterogeneous datastores in sync (like MySQL and ElasticSearch) and addresses challenges that exist with traditional techniques like dual-writes and distributed transactions [3][4].

In databases like MySQL and PostgreSQL, transaction logs are the source of CDC events. As transaction logs typically have limited retention, they aren’t guaranteed to contain the full history of changes. Therefore, dumps are needed to capture the full state of a source. There are several open source CDC projects, …

Wow !!! Its easy too restore sensitive data without any fear !!!

Its really tough sometimes , we restored the sensitive data without knowing and test mails triggered to customer as $100 deducted from your account for purchase . Its strange scenario when we missed to cleansing the customer data in DEV Sandbox !!!

Yes MasKING sensitive / Credential is easy now !!! Reference : https://github.com/kibitan/masking

Just tried simple practice for masking the paymentdb table data with masking , Its working as expected

Step 1 : Installed latest Ruby version and masking using below commands . Before doing install , update the server with latest packages

rvm install ruby-2.6.3
gem install masking
…

See some update at the end: 23 Dec 2019

MySQL and PHP is a love story that started long time ago. However the love story with MySQL 8.0 was a bit slower to start… but don’t worry it rules now !

The support of MySQL 8.0’s new default authentication method in PHP took some time and was added in PHP 7.2.8 but removed in PHP 7.2.11.

Now it’s fully supported in PHP 7.4 !

If you have installed PHP 7.4, you can see that the new plugin auth_plugin_caching_sha2_passwordis now available:

# php -i | grep "Loaded plugins\|PHP Version " | tail -n2
PHP Warning:  Module 'mysql_xdevapi' already loaded in Unknown on line 0
PHP Version => 7.4.0
Loaded plugins => mysqlnd,debug_trace,auth_plugin_mysql_native_password, …

Angular 9 is in pre-release! Read about its new features in this article and how to update to the latest Angular version in this article.

You can also get our Angular 8 book for free or pay what you can.

This tutorial is designed for developers that want to use Angular 9 to build front-end apps for their back-end REST APIs. You can either use Python & Django as the backend or use JSON-Server to mock the API if you don't want to deal with Python. We'll be showing both ways in this tutorial.

Check out the other parts of this tutorial:

Adding Routing Building Navigation UI Using Angular Material 8

This tutorial deals with REST APIs and routing but you can also start with basic concepts by following this tutorial (part 1 and part 2) instead which you'll build a simple calculator.

If you would like to consume a third-party REST API instead of building your own API, make to check out this tutorial. …

In this Angular 9 tutorial, we'll learn to build an Angular 9 CRUD example application going through all the required steps from creating/simulating a REST API, scaffolding a new project, setting up the essential APIs, and finally building and deploying your final application to the cloud.

We'll learn by example how to send GET requests with URL query strings and parameters and process HTTP responses from REST API servers in your Angular 9/8 application using Httplient for fetching and consuming JSON data, how to do error handling for HTTP errors using the RxJS throwError() and catchError() operators, how to retry failed HTTP requests in poor network connections and cancel pending requests using the RxJS retry() and takeUntil() operators, and finally how to deploy the application to Firebase hosting using the latest Angular 8.3+ features. We'll also see how to use Angular services and RxJS Observables, and learn how to set up Angular …

Introduction MySQL offers two types of clustering solution for managing Read/Write intensive workloads , ensuring Rock Solid Availability.

1.MySQL InnoDB Cluster
2. MySQL NDB Cluster

Glimpse of MySQL InnoDB Cluster    This Cluster is designed for users that uses MySQL Server with InnoDB storage engine.    It will serve as a natural extension for users currently using MySQL Replication with InnoDB to a       new replication architecture i.e Clustering on top of Group Replication. MySQL InnoDB Cluster = MySQL Server + MySQL Shell + MySQL Router.
MySQL Server

• Group Replication Technology.
• Single-Primary /Multi-Primary Mode.
• Fault Tolerance.
• Conflict detection and resolution.
• Automatic distributed recovery.

MySQL Shell

• Multi-Language(Python , Java script , …

In the first part of this blog, we covered a deployment walkthrough of MySQL InnoDB Cluster with an example on how the applications can connect to the cluster via a dedicated read/write port.

In this operation walkthrough, we are going to show examples on how to monitor, manage and scale the InnoDB Cluster as part of the ongoing cluster maintenance operations. We’ll use the same cluster what we deployed in the first part of the blog. The following diagram shows our architecture:

We have a three-node …

In this post, we will explore one approach to MySQL high availability with ProxySQL, Consul and Orchestrator.

This is a follow up to my previous post about a similar architecture but using HAProxy instead. I’ve re-used some of the content from that post so that you don’t have to go read through that one, and have everything you need in here.

Let’s briefly go over each piece of the puzzle:

– ProxySQL is in charge of connecting the application to the appropriate backend (reader or writer).

It can be installed on each application server directly or we can have an intermediate connection layer with one or more ProxySQL servers. The former probably makes sense if you have a small number of application servers; as the number grows, the latter option becomes more attractive. Another scenario for the …

To illustrate how easy it’s to see who’s trying to access data they have not been granted for, we will first create a schema with two tables:

mysql> create database mydata;
mysql> use mydata
mysql> create table table1 (id int auto_increment primary key, 
              name varchar(20), something varchar(20));
mysql> create table table2 (id int auto_increment primary key, 
              name varchar(20), something varchar(20));

Now, let’s create a user :

mysql> create user myuser identified by 'mypassword';

And as it’s always good to talk about SQL ROLES, let’s define 3 roles for our user:

• myrole1: user has access to both tables in their entirety, reads and writes
• myrole2: user has access only to `table2`, reads and writes
• myrole3: user has only access to the column `name`of `table1` and …