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10 Newer Entries Showing entries 91 to 100 of 33492 10 Older Entries
Dynamic compound statements in MariaDB
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A long-ago-discussed and much-requested feature, "dynamic compound statements", is working at last.

It's been eleven years since the original discussion of dynamic compound statements for MySQL, as you can see by looking at the worklog task on the wayback machine. (As usual, you have to click the "high level architecture" box to see the meat of the specification.) The essential idea is that one can directly enter compound statements like BEGIN ... END and conditional statements like "IF ... END IF" and looping statements …

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Disabling InnoDB in MySQL 5.6 and MariaDB 10.0
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There are a few circumstances where one will not want to run with only MyISAM tables. In this case, it can be beneficial to completely disable InnoDB.

As InnoDB has become more prevalent, disabling it in MySQL requires a little more effort than before.

In MariaDB 10.0, you can still completely disable it as you have done in the past (just add the –skip-innodb option, specify default-storage-engine=MyISAM, and comment out other InnoDB options):

[mysqld]
skip-innodb
default-storage-engine=MyISAM

Alternatively, instead of –skip-innodb, you can instead use “innodb=OFF”:

[mysqld]
skip-innodb …
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Resolving “Unknown storage engine ‘InnoDB’” Error when Running MyISAM-only and Upgrading to MySQL 5.6 or MariaDB 10.0
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I know, what, MyISAM-only? Yes, it’s true, and it occurs more than you might think.

If you do run MyISAM-only, it’s common to have disabled InnoDB altogether (–skip-innodb) to avoid allocating any RAM to it, and to avoid unnecessary files required for backups, and so forth. (See this post if interested in disabling InnoDB in MySQL 5.6 and/or MariaDB 10.0.)

One improvement in MySQL 5.6 and MariaDB 10.0 is the addition of some system tables. The 2 that are in …

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#DBHangOps 11/13/14 -- More Orchestrator, Dealing with logical corruption, and more!
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#DBHangOps 11/13/14 -- More Orchestrator, Dealing with logical corruption, and more!

Hello everybody!

Join in #DBHangOps this Thursday, November, 13, 2014 at 11:00am pacific (18:00 GMT), to participate in the discussion about:

  • More uses of Orchestrator for MySQL
  • Dealing with logical corruptions (a.k.a. a bug in my application changed data it shouldn't have...)
  • Mixing data and metadata

You can check out the event page at …

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Active-Active Replication, Performance Improvements & Operational Enhancements – some of what’s available in the new MySQL Cluster 7.4.2 DMR
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Oracle have just made availble the new MySQL Cluster 7.4.2 Development Milestone Release – it can be downloaded from the development release tab here. Note that this is not a GA release and so we wouldn’t recommend using it in production.

This is the second DMR for MySQL 7.4; the delta between this DMR and 7.4.1 can be viewed in the …

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The Perfect Server - Ubuntu 14.10 (nginx, BIND, Dovecot, ISPConfig 3)
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The Perfect Server - Ubuntu 14.10 (nginx, BIND, Dovecot, ISPConfig 3)

This tutorial shows how to prepare an Ubuntu 14.10 (Utopic Unicorn) server (with nginx, BIND, Dovecot) for the installation of ISPConfig 3, and how to install ISPConfig 3. ISPConfig 3 is a webhosting control panel that allows you to configure the following services through a web browser: Apache or nginx web server, Postfix mail server, Courier or Dovecot IMAP/POP3 server, MySQL, BIND or MyDNS nameserver, PureFTPd, SpamAssassin, ClamAV, and many more. This setup covers nginx (instead of Apache), BIND (instead of MyDNS), and Dovecot (instead of Courier).

Log Buffer #396, A Carnival of the Vanities for DBAs
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This Log Buffer Edition lists down some of valuable blog posts from across the arenas of Oracle, SQL Server, and MySQL.

Oracle:

OOW Recap: Industrial Innovation with IoT, enabled by Oracle Fusion Middleware and JD Edwards.

PeopleSoft HCM 9.2 Update Image 9 is Now Available! – Simple and Intuitive User Interface on Multiple Devices.

API Catalog ( …

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How to setup High Availability PrestaShop on multiple servers with MariaDB Galera Cluster
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November 7, 2014 By Severalnines

PrestaShop is a popular open source e-commerce software powering over 200,000 online stores, according to the company. We’ve seen a bit of interest into high availability PrestaShop setups, so this post will show you how to achieve that on multiple servers. Note that this setup not only caters for failures, but by load balancing traffic across multiple servers, it also allows the system to scale and handle more users.

This post is similar to our previous posts on web application scalability and high availability:

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Undelete rows with the binary log
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Can you use the binary logs to undo a DELETE? Maybe, if you're using ROW format logging. The difference between a delete and an insert event could be just one byte - the one that maps it as a DELETE_ROWS_EVENT or a WRITE_ROWS_EVENT. Let's try it.

I've already populated this table with a few rows:

CREATE TABLE `undo_test` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`t` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`v` varchar(20) DEFAULT NULL,
`b` blob,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;

Save a hash so we can see if the undo really works later:

mysql -e "SELECT …







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Ubuntu 14.10 LAMP server tutorial with Apache 2, PHP 5 and MySQL (MariaDB)
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Ubuntu 14.10 LAMP server tutorial with Apache 2, PHP 5 and MySQL (MariaDB)

LAMP is short for Linux, Apache, MySQL, PHP. This tutorial shows how you can install an Apache 2 webserver on an Ubuntu 14.10 server with PHP5 support (mod_php) and MySQL support. Additionally, I will install phpmyadmin to make MySQL administration easier. A LAMP setup is the perfect basis for CMS systems like Joomla, Wordpress or Drupal.

10 Newer Entries Showing entries 91 to 100 of 33492 10 Older Entries

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