Welcome!

Linux Authors: Yeshim Deniz, Elizabeth White, Carmen Gonzalez, Trevor Parsons, Pat Romanski

Related Topics: Linux

Linux: Article

Migrating to Open Source Databases Running on Linux

Databases Like MySQL, Ingres r3, PostgreSQL, and Firebird Have Aroused a Lot of Interest

Open source databases running on Linux like MySQL, Ingres r3, PostgreSQL, and Firebird have aroused a lot of interest.

Database developers and corporate users are heralding the anticipated the release of MySQL 5.0, which includes enterprise-level features such as stored procedures, triggers, and views.

Last August Computer Associates made Ingres r3 available under the CA Trusted Open Source License and followed up with a Million-Dollar Challenge, an unprecedented offer to the open source community to develop migration toolkits for the system.

Tony Gaughan, senior VP at Computer Associates, says, "The relational database world is evolving. Enterprise customers are demanding rich, functional products that scale, while lowering the total cost of ownership. Ingres has the pedigree of one of the most seasoned and functional products in the market that can be flexible enough to meet the demands of even the largest organizations."

The publicly traded data infrastructure software company Pervasive Software now services and supports PostgreSQL. Marten Mickos, CEO of MySQL AB, as quoted in SearchEnterpriseLinux.com, is optimistic about open source databases this year betting that "We will see increased growth, faster growth than before, in the adoption of open source in the enterprise, not just for MySQL, but across the board."

Though surely not breaking news, there are many compelling business and technical reasons for migrating to an open source database running on Linux. IT organizations are becoming more focused on business value and are asking questions like "Are we overspending on software? Are there more cost-effective alternatives that meet our specific needs and don't lock us into a long-term relationship with a vendor?"

Besides, unlike the desktop, a database isn't a user-facing technology. A change or modification to a database is less likely to "stir a hornet's nest" among a company's transactional or knowledge workers.

From a technical perspective, security and flexibility are being given serious consideration. For example, since Microsoft SQL Server is tightly integrated into the Windows platform, it's exposed to Windows virus attacks and, as a result, is vulnerable. There have been numerous documented virus attacks on Microsoft Windows, the worst attacks targeted at SQL Server. The Sapphire/Slammer worm (www.cs.berkeley.edu/~nweaver/sapphire/) exploited a buffer overflow vulnerability in Microsoft SQL Server. It infected at least 75,000 hosts and caused network outages and unforeseen consequences such as canceled airline flights, interference with elections, and ATM failures.

Companies are valuing more and more the need to assume greater control of their development processes. With open source, not only can a company view and modify the source code to fix bugs and add needed features, they can control the code's future development. After a consultant or vendor has developed a specific open source application for a customer, that customer is free to use a different consultant or vendor for future development, maintenance, and enhancements if it likes.

Since it's unlikely that Microsoft will open source SQL Server anytime soon, I thought LinuxWorld readers might find an overview of how to migrate the data structure and data from SQL Server to open source databases running on Linux valuable. A word of caution - tread carefully! A manual migration is extremely tedious. Each step takes many man-hours to complete. And, due to space limitations, I won't address the manual migration of stored procedures, views, and triggers that, admittedly, are important components of the enterprise-level database.

That being said, if considering a migration from Microsoft SQL Sever to MySQL, I would recommend waiting for MySQL 5.0 since the current versions don't have stored procedures, views, and triggers. PostreSQL, Ingres r3, and Firebird support stored procedures, views, and triggers so those databases are ready for migration and implementation today. For additional instructions on migrating stored procedures, views, and triggers please see (www.versora.com/__files/documentation/database_migrationsec.pdf)

Migrating Data Structure
First, you'll need to export the table structure using SQL Server Enterprise Manager:

  • At the SQL server, launch Enterprise Manager and connect to the database you intend to migrate.
  • Select all the tables that are being migrated, right-click, and choose Generate SQL Scripts.
  • In the dialog that appears, switch to the ‘Formatting' tab. Uncheck Generate the DROP <object > Command for each Object box. Check Generate Scripts for All Dependent Objects.
  • To make things more manageable, you'll probably want to choose Create One File Per Object. Click OK and indicate where to save the script files. This procedure will create a data structure that works only with SQL Server.
Tweaking will be required for the new database. Consider removing the brackets around names and types. Change types to corollary types. Remove the permissions and index statements from the end of each of these files and store them in a temporary "holding" file that will be applied after data is applied (for speed reasons). If statements aren't revised as indicated, migrating the data will be significantly slower.

When completed, copy these files to the new machine (via file sharing, by burning a CD, or any other way you want), and apply them to the new database. Each database has its own way of running SQL script files though most will let you execute scripts via command-line redirection. For example, PostgreSQL has a command-line tool called psql used to import SQL script files. An example command line for PostgreSQL might look something like this:

psql <dbname> -U <username> < sqlscript.sql

The total time needed to move the data structure manually varies depending on which database you're migrating to, how complicated existing tables are, and how many tables there are. Though this isn't a difficult phase, it can be tedious.

More Stories By Jon Walker

Jon Walker serves as CTO of Versora, an ISV providing Microsoft to Linux migration software. Mr. Walker recently has co-authored 2 whitepapers with Novell titled Migrating from IS Web Servers to Apache SUSE LINUX Enterprise Server 9.0 and Migrating File and Print Servers from Windows to SUSE LINUX Enterprise Server 9. Prior to Versora, Mr. Walker was CTO/VP of Engineering for Miramar Systems. Software developed under his direction at Miramar has been deployed to over 20 million computers worldwide. Mr. Walker has also served as senior technologist for Nortel and Xing Technology (now Real Networks).

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@ThingsExpo Stories
The definition of IoT is not new, in fact it’s been around for over a decade. What has changed is the public's awareness that the technology we use on a daily basis has caught up on the vision of an always on, always connected world. If you look into the details of what comprises the IoT, you’ll see that it includes everything from cloud computing, Big Data analytics, “Things,” Web communication, applications, network, storage, etc. It is essentially including everything connected online from hardware to software, or as we like to say, it’s an Internet of many different things. The difference ...
Cloud Expo 2014 TV commercials will feature @ThingsExpo, which was launched in June, 2014 at New York City's Javits Center as the largest 'Internet of Things' event in the world.
An entirely new security model is needed for the Internet of Things, or is it? Can we save some old and tested controls for this new and different environment? In his session at @ThingsExpo, New York's at the Javits Center, Davi Ottenheimer, EMC Senior Director of Trust, reviewed hands-on lessons with IoT devices and reveal a new risk balance you might not expect. Davi Ottenheimer, EMC Senior Director of Trust, has more than nineteen years' experience managing global security operations and assessments, including a decade of leading incident response and digital forensics. He is co-author of t...

ARMONK, N.Y., Nov. 20, 2014 /PRNewswire/ --  IBM (NYSE: IBM) today announced that it is bringing a greater level of control, security and flexibility to cloud-based application development and delivery with a single-tenant version of Bluemix, IBM's platform-as-a-service. The new platform enables developers to build ap...

The major cloud platforms defy a simple, side-by-side analysis. Each of the major IaaS public-cloud platforms offers their own unique strengths and functionality. Options for on-site private cloud are diverse as well, and must be designed and deployed while taking existing legacy architecture and infrastructure into account. Then the reality is that most enterprises are embarking on a hybrid cloud strategy and programs. In this Power Panel at 15th Cloud Expo (http://www.CloudComputingExpo.com), moderated by Ashar Baig, Research Director, Cloud, at Gigaom Research, Nate Gordon, Director of T...
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In his session at Internet of @ThingsExpo, James Kirkland, Chief Architect for the Internet of Things and Intelligent Systems at Red Hat, described how to revolutioniz...
Technology is enabling a new approach to collecting and using data. This approach, commonly referred to as the "Internet of Things" (IoT), enables businesses to use real-time data from all sorts of things including machines, devices and sensors to make better decisions, improve customer service, and lower the risk in the creation of new revenue opportunities. In his General Session at Internet of @ThingsExpo, Dave Wagstaff, Vice President and Chief Architect at BSQUARE Corporation, discuss the real benefits to focus on, how to understand the requirements of a successful solution, the flow of ...
The security devil is always in the details of the attack: the ones you've endured, the ones you prepare yourself to fend off, and the ones that, you fear, will catch you completely unaware and defenseless. The Internet of Things (IoT) is nothing if not an endless proliferation of details. It's the vision of a world in which continuous Internet connectivity and addressability is embedded into a growing range of human artifacts, into the natural world, and even into our smartphones, appliances, and physical persons. In the IoT vision, every new "thing" - sensor, actuator, data source, data con...
"BSQUARE is in the business of selling software solutions for smart connected devices. It's obvious that IoT has moved from being a technology to being a fundamental part of business, and in the last 18 months people have said let's figure out how to do it and let's put some focus on it, " explained Dave Wagstaff, VP & Chief Architect, at BSQUARE Corporation, in this SYS-CON.tv interview at @ThingsExpo, held Nov 4-6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Focused on this fast-growing market’s needs, Vitesse Semiconductor Corporation (Nasdaq: VTSS), a leading provider of IC solutions to advance "Ethernet Everywhere" in Carrier, Enterprise and Internet of Things (IoT) networks, introduced its IStaX™ software (VSC6815SDK), a robust protocol stack to simplify deployment and management of Industrial-IoT network applications such as Industrial Ethernet switching, surveillance, video distribution, LCD signage, intelligent sensors, and metering equipment. Leveraging technologies proven in the Carrier and Enterprise markets, IStaX is designed to work ac...
"There is a natural synchronization between the business models, the IoT is there to support ,” explained Brendan O'Brien, Co-founder and Chief Architect of Aria Systems, in this SYS-CON.tv interview at the 15th International Cloud Expo®, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
C-Labs LLC, a leading provider of remote and mobile access for the Internet of Things (IoT), announced the appointment of John Traynor to the position of chief operating officer. Previously a strategic advisor to the firm, Mr. Traynor will now oversee sales, marketing, finance, and operations. Mr. Traynor is based out of the C-Labs office in Redmond, Washington. He reports to Chris Muench, Chief Executive Officer. Mr. Traynor brings valuable business leadership and technology industry expertise to C-Labs. With over 30 years' experience in the high-tech sector, John Traynor has held numerous...
Bit6 today issued a challenge to the technology community implementing Web Real Time Communication (WebRTC). To leap beyond WebRTC’s significant limitations and fully leverage its underlying value to accelerate innovation, application developers need to consider the entire communications ecosystem.
The 3rd International @ThingsExpo, co-located with the 16th International Cloud Expo - to be held June 9-11, 2015, at the Javits Center in New York City, NY - announces that it is now accepting Keynote Proposals. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devices - computers, smartphones, tablets, and sensors - connected to the Internet by 2020. This number will continue to grow at a rapid pace for the next several decades.
The Internet of Things is not new. Historically, smart businesses have used its basic concept of leveraging data to drive better decision making and have capitalized on those insights to realize additional revenue opportunities. So, what has changed to make the Internet of Things one of the hottest topics in tech? In his session at @ThingsExpo, Chris Gray, Director, Embedded and Internet of Things, discussed the underlying factors that are driving the economics of intelligent systems. Discover how hardware commoditization, the ubiquitous nature of connectivity, and the emergence of Big Data a...
Almost everyone sees the potential of Internet of Things but how can businesses truly unlock that potential. The key will be in the ability to discover business insight in the midst of an ocean of Big Data generated from billions of embedded devices via Systems of Discover. Businesses will also need to ensure that they can sustain that insight by leveraging the cloud for global reach, scale and elasticity.
SYS-CON Events announced today that Windstream, a leading provider of advanced network and cloud communications, has been named “Silver Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9–11, 2015, at the Javits Center in New York, NY. Windstream (Nasdaq: WIN), a FORTUNE 500 and S&P 500 company, is a leading provider of advanced network communications, including cloud computing and managed services, to businesses nationwide. The company also offers broadband, phone and digital TV services to consumers primarily in rural areas.
SYS-CON Events announced today that IDenticard will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. IDenticard™ is the security division of Brady Corp (NYSE: BRC), a $1.5 billion manufacturer of identification products. We have small-company values with the strength and stability of a major corporation. IDenticard offers local sales, support and service to our customers across the United States and Canada. Our partner network encompasses some 300 of the world's leading systems integrators and security s...
IoT is still a vague buzzword for many people. In his session at @ThingsExpo, Mike Kavis, Vice President & Principal Cloud Architect at Cloud Technology Partners, discussed the business value of IoT that goes far beyond the general public's perception that IoT is all about wearables and home consumer services. He also discussed how IoT is perceived by investors and how venture capitalist access this space. Other topics discussed were barriers to success, what is new, what is old, and what the future may hold. Mike Kavis is Vice President & Principal Cloud Architect at Cloud Technology Pa...
Cloud Expo 2014 TV commercials will feature @ThingsExpo, which was launched in June, 2014 at New York City's Javits Center as the largest 'Internet of Things' event in the world. The next @ThingsExpo will take place November 4-6, 2014, at the Santa Clara Convention Center, in Santa Clara, California. Since its launch in 2008, Cloud Expo TV commercials have been aired and CNBC, Fox News Network, and Bloomberg TV. Please enjoy our 2014 commercial.