DNS is one of the most fundamental parts of a website. No website can run without a proper configuration on DNS. For beginners, it might be a bit difficult for them to understand and resolve DNS-related issues. This post aims to provide a bit more help for those who are still struggling to configure the DNS for their websites.

In short, what is DNS and why we need it?

DNS stands for Domain Name Service. You can think of it as a computer responsible for converting the domain name to an IP address. For example, if I type facebook.com into my browser, the DNS will look into its database and return the IP address of this domain, which is 66.220.158.68. Because of this, most of the issues about the domain name of your websites are related to DNS.

We need DNS because our human memory is limited and we cannot remember all complex and meaningless IP addresses of all websites in the world. It is just like …

Overview

DDL (Data Definition Language) statements create, alter, and remove database objects. These types of changes can be a very dangerous action to take on such a critical piece of your infrastructure. You want to make sure that the command that you are executing has been given proper thought and testing.

In this post I go through multiple version of MySQL and verify the best course of action to take in regards to executing DDL statements.  There are many things that you have to consider when making these types of changes, such as disk space, load on the database server, slave replication, the type of DDL statement you are executing, and if it will lock the table. 

Because of these risks, there are tools that can be used to help mitigate some of the dangers. But unless you have tested and verified their functionality, these tools in themselves can cause trouble. Whenever in doubt, take the time to test …

Maintaining partitioned tables in MySQL can be tedious. In a reporting database that uses monthly date partitions, I've found that I can simplify many frequent partition operations using the common_schema QueryScript language. Below I will describe two specific examples.

Removing old data

I like to keep a 2-3 month window of data in some of my reporting tables. In order to maintain that window I periodically purge data more than 3 months old using the TRUNCATE PARTITION command. Since I want to apply the same purge logic to all tables matching a consistent naming pattern, I can use the common_schema …

This blog examines MySQL 5.7’s primary key lookup results, and determines if MySQL 5.7 is really faster than its early versions.

MySQL 5.7 was released some time ago, and now that the dust has settled it’s a good time to review its performance improvements.

I’m not doing this just to satisfy my own curiosity! Many customers still running MySQL 5.6 (or even MySQL 5.5) often ask “How much performance gain we can expect by switching to 5.7? Or will it actually be a performance hit, especially after Peter’s report here: https://www.percona.com/blog/2013/02/18/is-mysql-5-6-slower-than-mysql-5-5/?”

To determine the answer, we’ll look at some …

This Log Buffer Edition covers weekly round up of blog posts from Oracle, SQL Server and MySQL.

Oracle:

The Universal Theme introduced with APEX 5 is immensely good looking and comes with a powerful Theme Roller to customize it.

The implementation of Ksplice has been greatly simplified. Now you just need to register your system(s) with Unbreakable Linux Network (ULN), subscribe to the appropriate Ksplice channel, use the yum command to install the uptrack package, and perform any custom configuration. Your systems will be automatically updated with the latest kernel and user space patches.

Every …

In this post i want to show you how to take database backup using Laravel backup package this package will provide command to take backup from your live server and that command you can use in crontab file on server that way you can get backup daily on every hourly etc as you want Database backup

In a previous post, we looked into load balancing for PHP apps and how to configure read-write splitting on MySQL Replication setups. The native PHP MySQL driver (php-mysqlnd_ms) would perform read/write splits, and the MySQL connections would be made on one of the two listeners of HAProxy.

In this post, we’ll play around with Java, Connector/J, MySQL Replication and HAProxy. One important thing to note is that, unlike php-mysqlnd_ms, Connector/J is aware of MySQL Replication but it does not automatically perform read-write splitting. We have to instruct the query statement in the code of our Java application to establish a so-called read operation, using a JDBC connection object as read-only. Then, the driver will redirect the query to one of the healthy slaves as defined in the JDBC connection …

When your database undergoes a restart, whether it's a clean reboot or a crash, it will typically create two negative effects your application will have to face: blackout (downtime) and brownout (period of degraded performance after startup).

In my previous post, I described how Aurora makes downtime less stressful for you, now it's time to investigate yet another feature that should come in handy in mission-critical environments: the survivable page cache.

Introduction As usual, let's throw in a tiny bit of theory before looking at the demonstrations.
The InnoDB Buffer Pool is an in-memory area for caching data and index pages. That said, buffer pool can also be called a "page cache". Both terms mean …

Sometimes we have apis implemented in our application and there are different levels at which these can be tested.

1. Unit tested at model level to check the logic is working fine
2. Tested at API call level to ascertain whether all the apis as expected are working and are returning data as expected.


Today, we will be learning how to test APIs in CodeIgniter 2.x version using phpunit and Guzzle Http client.

Basically Guzzle Http client is a client used to make http client requests.

Ref: https://github.com/guzzle/guzzle

"Guzzle is a PHP HTTP client that makes it easy to send HTTP …

nowdays sublime is a very popular text edir in the developing field sublime text editor is provide lots of packages like code formatter php syntax etc sublime is also provide snippet snippet is very intrsting point because if you need to write same code lots of time than you can create shortcut