Background:

Prior to version 3.10, MySQL Enterprise Backup (MEB) used zlib compression for in-memory compression of datafiles. The compression worked by splitting the innodb datafiles into fixed size blocks and compressing each block independently.After searching on the web we found there are many compression algorithms available which can be used for compression. This triggered the idea of testing the performance of available compression algorithms. If the benchmark shows improved performance we can make backup and/or restore faster by adding the new compression algorithm to MEB.

Implementation :

The idea to implement the algorithms procceded as follows .

1. Select a "long list" of algorithms based on literature and what Google and other databases are using.
2. Create a prototype of MEB supporting the algorithms in the long list.
3. Run comparison tests of algorithms with the MEB …

So I’ve submitted my talks for the Tech14 UK Oracle User Group conference which is in Liverpool this year. I’m not going to give away the topics, but you can imagine they are going to be about data translation and movement and how to get your various databases talking together.

I can also say, after having seen other submissions for talks this year (as I’m helping to judge), that the conference is shaping up to be very interesting. There’s a good spread of different topics this year, but I know from having talked to the organisers that they are looking for more submissions in the areas of Operating Systems, Engineered Systems and Development (mobile and cloud).

If you’ve got a paper, presentation, or idea for one that you think would be useful, …

New Continuent Tungsten Replicator 2.2.1 is now available for download at www.continuent.com/software and https://code.google.com/p/tungsten-replicator/wiki/Downloads?tm=2.Tungsten Replicator is a high performance, open source, data replication engine for MySQL and Oracle, released under a GPL V2 license. Tungsten Replicator has all the features you expect from enterprise-class data replication

The Oracle Database 12c documentation says you can set the maximum size of a VARCHAR2 to 32,767 bytes. That’s true except when you’re trying to map a large Java string to a VARCHAR2. It fails when the physical size of the Java string is greater than 4,000 bytes with an ORA-01002 or fetch out of sequence error.

SELECT read_text_file('C:\Data\loader\Hobbit1.txt')
*
ERROR at line 1:
ORA-24345: A Truncation or null fetch error occurred
 
ERROR:
ORA-01002: fetch out of sequence

You need to grant privileges before you can test this code. You can grant privileges by connecting as the SYS user of a CDB (or non-multitenant database) or as the ADMIN user of a PDB with the AS SYSDBA clause. Then, you run the following command to grant external file access to the JVM inside Oracle Database 12c:

SAN JOSE, CA– May 6, 2014 – Continuent, Inc., a leading provider of open source database clustering and replication solutions, today announced that their recently announced Tungsten Replicator 3.0 solution has been certified by Cloudera, the leader in enterprise analytic data management powered by Apache Hadoop™. Continuent Tungsten Replicator 3.0 enables organizations to quickly and easily 

Yesterday I learnt an important lesson about an important difference between NoSQL and MySQL, at least when it comes to the marketing and hype.

I saw a tweet from around marketing of one of NoSQL leaders:

Most people apparently would just conclude from the tweet's text, however I actually clicked the link, and couldn't believe eyes:

I guess that in NoSQL, when it comes to the integrity of data as well as hype - it is eventually consistent...

Don't miss your opportunity to learn about Continuent Tungsten via our free "Setup & Operate" webcast series. These free webcasts include live presentations and interactive Q&A.Webcast OverviewsSetup & Operate Tungsten ReplicatorMay 15th, 10:00 am PDTTungsten Replicator is an innovative and reliable tool that can solve your most complex replication problems. We will introduce Replicator

Dear MySQL users,

MySQL Connector/Net 6.9.0 a new version of the all-managed .NET driver for MySQL has been released. This is an alpha release for 6.9.x and is not recommended for production environments.

The 6.9 version of MySQL Connector/NET brings the following new features:

     * MySQL Personalization Provider.
     * SiteMap Web Provider.
     * Simple Membership Web Provider.

Enjoy and thanks for the support!
On behalf of the MySQL Connector/NET and the MySQL/ORACLE RE Team.

While I posted how to install Toad for MySQL Freeware five years ago, I’m always surprised how few people know about it there and consistently updated and improved. You can download Toad for MySQL Freeware or Toad Freeware for Oracle, SQL Server, Sybase, or IBM DB2 at this web site.

You can also download Toad Data Modeler Freeware Edition. Just two notes, while Toad for Oracle Freeware is an MSI file, Toad for MySQL Freeware is a zip file and limited to only a Windows …

MySQL SystemQA: MySQL Fabric server farm Setup and Testing overview

MySQL Fabric is an open-source solution released by the MySQL Engineering team at Oracle. 
It is an extensible and easy to use system for managing a MySQL deployment for Sharding  
and High-availability.

High availability is generally used to describe the ability of a system to continue operating 
and provide resources to the application when a failure occurs in one or more of the 
following categories in a fault domain: hardware, software, or application.

With high availability feature, MySQL fabric manages several servers in different groups
using replication topology. At any point of failure it creates servers available to do the regular 
activities.

To test similar functionalities, we have designed a setup in JET framework which will handle multiple 
servers in multiple machines.

What we did?

We have started with a fabric setup class in JET framework, which …