TweetFollow Us on Twitter

Jun 00 Online

Volume Number: 16 (2000)
Issue Number: 6
Column Tag: MacTech Online

Relational Databases for Mac OS X Server

by Jeff Clites <online@mactech.com>

Earlier this year we covered WebObjects, but we didn't go into detail about the database solutions available to use with it. This month we are going to cover relational databases which run under Mac OS X Server. I should mention up front, though, that it's perfectly possible, and quite common, to run your application server and database on different machines, under different platforms. There can be convenience and speed advantages to running everything on one machine, but as your website scales up to higher capacities, you're certain to reach a point where you need to run multiple copies of your application server, on multiple machines, and modern databases are designed with the expectation that they will be accessed simultaneously from multiple locations. Of course, backing a WebObjects application is only one use for a database, and you may have other reasons for wanting a solution that you can run locally.

Database Adaptors

I should also explain a little bit about the way that WebObjects interfaces with databases. They communicate through an EOAdaptor, which usually takes the form of a shared library. The adaptor and the rest of the Enterprise Objects Framework (EOF) take care of most of the details of this communication, so that the developer doesn't have to worry about differences between the databases or between the dialects of SQL that they support. (It's even possible to develop adaptors to interface to non-relational databases, and Apple supplies an example Flat File Adaptor which lets you access formatted text files as though they were database tables.) Apple supplies EOAdaptors for Oracle, Sybase, Informix, and ODBC, although not for all platforms on which WebObjects runs. There are third-party adaptors available for many others—all of the databases we'll cover below have adaptors available. Note that there is currently no ODBC EOAdaptor available for Mac OS X Server, because the ODBC libraries aren't available for the platform, and neither are drivers for any of the databases you may wish to access by ODBC. (ODBC, or Open Database Connectivity, is a technology invented by Microsoft, and attempts to allow you to access different databases via a common API, with support for different databases being supplied by ODBC drivers. Its goal is analogous to that of the EOF, although it is functionally quite different.) Third parties have announced that they plan to bring ODBC support to Mac OS X, but it hasn't arrived yet.

SQL-based Databases

You have three main choices if you do want an SQL-based database which runs on Mac OS X Server itself: FrontBase, OpenBase, and MySQL. Each has its advantages and disadvantages, and the best choice will depend on your situation.

OpenBase has had a long history on the OpenStep platform, and was written specifically to run there. It comes with graphical administration tools, and has a few features, such as the ability to notify applications when data changes and integration with REALbasic, which are not commonly found in other databases. Mac OS X Server ships with OpenBase Lite, a free version which allows you to work with the included sample databases, but this version lacks administration tools and isn't really appropriate for development work. There is also a fully functional, time-limited demonstration version which you can download from the OpenBase website. This gives you ample opportunity to try out OpenBase for yourself, but for actual development or deployment you need to obtain a commercial license. Also note that OpenBase is available for Windows NT and Solaris, in addition to Mac OS X Server, so it is a good match for heterogeneous environments in which multiple operating systems are used, or migration from one to another is likely.

FrontBase, produced by Frontline Software of Denmark, is a cross-platform database written in C. It runs on a variety of platforms, including Mac OS X Server, Windows NT, Solaris, and Linux. Like OpenBase, it includes graphical administration tools, allowing you to create and manage databases easily. (Of course, you can also do this using SQL directly.) One key attraction of FrontBase is its flexible licensing terms. There are a number of different levels, based on different degrees of support and different features, such as bulk import tools and the ability to lock tables in memory. The lowest level is free, and is fully functional but lacks security features. This basic version is more than adequate for development work, and can even be used for deployment if you keep it safely behind a firewall.

The third choice is the open source database MySQL. (It's open source, but there is a fee for some types of commercial usage.) MySQL is very popular in the Linux community, and Anjo Krank has created a set of patches which allows it to run under Mac OS X Server. Actually, recent versions of MySQL will compile and run without patching, although you need a pthreads compatibility library which he provides. (He has also developed an EOAdaptor for MySQL, and a Perl DBI driver for FrontBase.) MySQL's claim to fame, other than being open source, is that it is extremely fast. The reason for its speed is, in part, that it lacks certain key database features, such as transactionality and rollback. These are major capabilities to do without, and in fact technically disqualify it from being a relational database, but if you can live with its limitations then it can be an excellent choice for many applications. Due to its heritage, you'll have to survive without built-in graphical management tools, but in the database arena it is often convenient to manage your database directly via SQL, because it allows you to easily save and reuse scripts for common tasks.

Oracle

As I mentioned before, you can certainly run your database on another platform, even if you are developing for Mac OS X Server. One setup you may want to consider is running Oracle8i under Linux. (This would unfortunately mean running it on an Intel box—Oracle runs neither on Mac OS X Server, nor on LinuxPPC. Given that Larry Ellison sits on Apple's board of directors, there is some hope that this situation may improve in the future. A Darwin version could do amazing things for the platform.) Neither Oracle nor Linux is trivial to administer, but I've heard it argued pretty convincingly that you should use Oracle from the beginning, even if you thing it's more database than you need. The argument goes that if you are running a database-backed website, you will eventually need Oracle, and your life will be easier if you don't have to deal with migrating to, and learning to administer, a new database just when your business is taking off and you're exceeding your capacity. (It's also true that both Linux and Oracle experience looks good on a resume these days.) Oracle is by far the most widely used database on the planet, and it has an excellent reputation for performance and reliability, although it's almost impossible to get hard numbers to quantify this. Personal experience has led me to believe that commercial databases all perform similarly when it comes to raw retrieval speed, although Oracle's unique approach to concurrency control and locking should give it an advantage when many processes are writing to the database at the same time. (In a nutshell, readers and writers rarely interfere with one another.) Oracle also has a very well thought out approach to backup management, and if your database fails you can often recover all the way up to the very last transaction committed. While making your decision, you should be aware that Oracle is extremely expensive, and although its licensing scheme is difficult to decipher, it does appear to be free for development use. If you plan on running a business which will depend on your database, you should give Oracle serious consideration. For extremely high-capacity deployments you will probably want to run Oracle on Solaris, and migrating from Linux to Solaris will be much easier than migrating from a different database architecture. (Oracle has been very good about making its database operate almost identically on all supported platforms.)

Once you've committed to a database, check out the MacTech Online web pages at <www.mactech.com/online/>.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Latest Forum Discussions

See All

Soft Drummer (Music)
Soft Drummer 1.0 Device: iOS Universal Category: Music Price: $14.99, Version: 1.0 (iTunes) Description: Soft Drummer is the closest thing to a pro session subtle drummer in your pocket. Easy to use and fast, it's much more than a... | Read more »
Is GO Gear the Pokemon GO map app you...
Now that we've settled into something of a Pokemon GO status quo, the number one desire of most players can best be summed out by modifying a quote from Rod Tidwell of Jerry Maguire: "Show me the Pokemon!" [Read more] | Read more »
Rodeo Stampede update: Mountains, new an...
The Savannah and Jungle were just the beginning in Rodeo Stampede. Get ready to head for the Mountains. I think I heard that in a beer ad once. [Read more] | Read more »
COSMOS RINGS (Games)
COSMOS RINGS 1.0.0 Device: iOS iPhone Category: Games Price: $5.99, Version: 1.0.0 (iTunes) Description: This game cannot be played without the Apple Watch.Released anniversary sale until August 31,2016 PST! A tragic tale of time's... | Read more »
How to get started selling on Mercari
As far as ecommerce has come over the last decade or so, there's still a tremendous opportunity to make it easier for people to buy and sell goods. That's especially true when it comes to shopping apps, which should only continue to increase in... | Read more »
Human Anatomy Atlas 2017 Edition - Compl...
Human Anatomy Atlas 2017 Edition - Complete 3D Human Body 1.0.24 Device: iOS iPhone Category: Medical Price: $24.99, Version: 1.0.24 (iTunes) Description: | Read more »
Heroes of Normandie (Games)
Heroes of Normandie 1.5 Device: iOS Universal Category: Games Price: $14.99, Version: 1.5 (iTunes) Description: The game does not support iPhone 4s and below | Read more »
Why you should never power up Pokemon in...
There's no question that candy is dandy in Pokemon GO. You need big quantities of it to evolve your Pokemon, and when combined with stardust, it can be used to power up your favorite pocket monsters as well, making them more formidable for the gym... | Read more »
Webzen launches 3D MMORPG MU Origin on i...
Mu Origin is featured time and time again at the very top of App Stores in China, and within the top five worldwide top-grossing charts on Google Play.Its popularity in Korea and China, featuring more than 120 registered players in China and 6... | Read more »
Severed (Games)
Severed 1.0 Device: iOS Universal Category: Games Price: $5.99, Version: 1.0 (iTunes) Description: LAUNCH DISCOUNT ON NOW!! ENDS AUGUST 4! ==== Take control of a one-armed warrior named Sasha, wielding a living sword on her journey... | Read more »

Price Scanner via MacPrices.net

Second-Quarter Tablet Shipments Fell 4.8% –...
The latest report from the global market research firm TrendForce finds that worldwide tablet shipments for this second quarter totaled 33.54 million units, representing a quarterly drop of 4.8% and... Read more
Global Smartphone Sales Volumes Mark Second S...
According to preliminary results from the International Data Corporation (IDC) Worldwide Quarterly Mobile Phone Tracker, vendors shipped a total of 343.3 million smartphones worldwide in the second... Read more
Apple TVs on sale for $20-$40 off MSRP
Best Buy has 32GB and 64GB Apple TVs on sale for $20-$40 off MSRP on their online store. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-store... Read more
Mac minis on sale for $50-$100 off MSRP
B&H Photo has Mac minis on sale for $50 off MSRP including free shipping plus NY sales tax only: - 1.4GHz Mac mini: $449 $50 off MSRP - 2.6GHz Mac mini: $649 $50 off MSRP - 2.8GHz Mac mini: $949... Read more
Clearance 2015 13-inch MacBook Airs available...
B&H Photo has clearance 2015 13″ MacBook Airs available for $300 off original MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 1.6GHz/4GB/128GB MacBook Air (MJVE2LL/A): $799... Read more
Apple certified refurbished iPad mini 4s avai...
Apple has certified refurbished iPad mini 4s now available for up to $120 off the cost of new models. An Apple one-year warranty is included with each iPad, and shipping is free. The following models... Read more
Notebook Makers In No Rush To Adopt USB-C – R...
Digitimes’ Cage Chao and Joseph Tsai note that while the USB Type-C interface is enjoying growing popularity among smartphones and tablet makers, notebook and all-in-one (AIO) PC vendors (other than... Read more
iMacs on sale for up to $250 off MSRP
B&H Photo has 21″ and 27″ Apple iMacs on sale for up to $250 off MSRP including free shipping plus NY sales tax only: - 27″ 3.3GHz iMac 5K: $2049 $250 off MSRP - 27″ 3.2GHz/1TB Fusion iMac 5K: $... Read more
12-inch 1.1GHz Retina MacBooks on sale for up...
Amazon has 2016 12″ 1.1GHz/256GB Retina MacBooks on sale for up to $100 off MSRP including free shipping: - 12″ 1.1GHz Space Gray Retina MacBook: $1199 $100 off MSRP - 12″ 1.1GHz Silver Retina... Read more
Bare Bones Software Releases Free TextWrangle...
Bare Bones Software has announced the release and immediate availability of TextWrangler 5.5, a significant update to its powerful, free, general purpose text editor for Mac OS X. TextWrangler is a... Read more

Jobs Board

*Apple* Solutions Consultant - APPLE (United...
Job Summary As an Apple Solutions Consultant, you'll be the link between our future customers and our products. You'll showcase your entrepreneurial spirit as you Read more
Lead *Apple* Solutions Consultant - APPLE (...
Job Summary The Lead ASC is an Apple employee who serves as the Apple business manager and influencer across a number of Reseller locations. The Lead ASC's role Read more
*Apple* Retail - Multiple Positions, Charles...
Job Description:SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
*Apple* Retail - Multiple Positions, Willow...
Job Description:SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
*Apple* Evangelist - JAMF Software (United S...
The Apple Evangelist is responsible for building and cultivating strategic relationships with Apple 's small and mid-market business development field teams. This Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.