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"It All Depends on What the Meaning of 'Open' Is," Says Sun's COO

"Only a customer can define the word "open," - that's Schwartz's view.

Sun's president and COO has done it again. He's bitten off, and publicly chewed, another of technology's thorniest questions - the very meaning of the word "open" as in source.

"Granted, I seem to spend a disproportionate amount of my time defining things," Schwartz writes in his latest blog at blogs.sun.com, "but it seems like a lot of industry rhetoric right now depends upon redefining history and vocabulary."

Schwartz points out how much discussion of terms like "open systems," "open source," and "open standards," there has been over the past 30 years, and says he'd like to add "some refinements" to the current debate.

This he promptly does by saying that "the definition of 'open' that matters most is the one experienced by a customer or end user - 'openness' is defined by the ease with which a customer can substitute one product for another."

He continues:

"Only a customer can define the word 'open.' That's my view. . . .If you love a product, but the vendor providing it triples its prices, how easily can you move from that product to a competitive product? If it's an open product, the customer will say it took no work. If it's not open, the customer's choices will be impeded - their options will be closed (and they'll find themselves paying big bucks for products).

This discussion, of enabling substitution, "is largely orthogonal to whether the source code to a product is available," Schwartz maintains. 

Say what? Aha, here comes the explanation:

"In the sense that by the definition above, if the barrier to entry in providing a substitute is complicated by issues other than access to source code, then the product cannot be considered open."

Schwartz then offers two examples of how the concept of "open" is made operational at Sun: one involving Unix, the other involving J2EE.

Starting with his Unix example, Sun's own Solaris OS, Scwartz launches into his pitch of just why he believes "open" needs redefining:

"Let's start with a little known fact: the source code to Solaris is available. The odds are good, somewhere in your enterprise or academic institution, you have a complete copy of the source tree (especially if you're reading this from Wall Street). And I'd like to start off by completely dismissing the relevance of that fact to the determination of whether Solaris or Unix is open."

"How easy is the move?" Schwartz asks rhetorically. 

"It's not particularly easy," he answers himself. "There are features in Solaris, like the Java Enterprise System Directory Service, N1 Grid Containers, dTrace or ZFS that don't show up in AIX. Nor is there an industry agreed upon definition of Unix to enable a neutral test, or a certification, of what you're using. There was, it was called POSIX, but then all the vendors (Sun among them), went well beyond POSIX in delivering operating system distributions - we added app servers and directory engines and web services infrastructure, innovations that saved customers millions of dollars, and tons of effort. But using those features made it difficult (but by no means impossible) for customers to substitute Unix vendors - and as IBM slows AIX investment, Solaris is bound to leapforg even further. So is AIX open? Does it promote choice? Well, by that sword, is Solaris? Or moreover, Red Hat?"

"Ask a customer," Schwartz continues. "'Open' describes the level of effort it takes to enable substitution. If it's tough, it ain't open." He then continues:

"So what if a customer wants to move today? It takes work. Is it doable? Sure, but depending upon the sophistication of your application, or the extent to which you've taken advantage of Solaris's innovation, it's far harder to move from Solaris to AIX, or Red Hat to SuSe, than from IBM's WebSphere to BEA's WebLogic. Run the same analysis on moving a reasonably complete .net application (eg, not IIS) from Windows to a substitute. You have to rewrite it (which, of course, many people do - but that's beside the point.)

To make matters worse, if you're running your Solaris app on industry standard x86 servers, and you want to move to AIX - well, you can't, because IBM doesn't make its operating system available on even its own x86 servers. Of the Unix suppliers, only Sun makes Solaris available on x86. Even IBM's x86 servers.

Open as in door, is different than open as in source. Unix, linux, Windows - none are open, I'd argue. There is no agreed upon specification, no neutral test to determine validity, and no guarantee made by vendors other than rhetoric."

Schwartz then moves onto J2EE.

"As you're well aware, there are several great application servers in the world, all adhering to a publicly available specification - BEA swept the market early on, and continues to drive some extraordinary innovation; IBM has made great fanfare of WebSphere; Sun has made its application server the backbone of JES, and free as the J2EE Reference Implementation; and of late, a few open source entrants have entered the field.

There are probably 20 others I've missed - from Oracle, Borland, Sybase, JBoss, Pramati, many many others. And for any of these vendors to fly the J2EE flag, to use that brand as an assurance to customers, they must pass a common compliance test, contained in a Test Compatibility Kit (TCK). Fail the test, you can't fly the flag. That's how we preserve compatibility, and portability (which as you probably know, we're a bit touchy about)."

"So imagine you elect to move off Sun's app server, to move to IBM's WebSphere," Schwartz writes. "To check to see if you've written to an instruction that isn't in the J2EE standard, you could have your development staff run our Application Verification Kit. The AVK tests to see if you've inadvertently defeated portability in your application. You'll soon realize there's nothing stopping you from moving off of Sun's app server to WebSphere - so you move the application over, and resume running your business. "

In theJ2EE world, industry participants are incented to enable substitution, Schwartz argues. "If they impede it, they can't fly the J2EE flag."

In this instance, he concludes the measurement of "open" is therefore ultimately made by a customer swapping out one app server for another.

For those who want proof of his viewpoint, he continues:

"Imagine you come to your senses next quarter when IBM asks for a big license fee (did I mention Sun's app server is free on all platforms?); you run the AVK again to see if you're gotten hung up on any IBM "enhancements" that go beyond J2EE; and if the answer is no, you move back. Substitution is enabled.

Is the source code available? It doesn't matter - what matters is adherence to a standard to enable substitution. An open standard, publicly available, for which a neutral test can be supplied (the TCK/AVK). If I failed the AVK, and had source to WebSphere, would it matter? No. I'd have to invest time and resources in moving, far more than if I'd stay faithful to J2EE. Open standards promote substitution, and thus competition. They are the standardized rails of the network - and the customer's best friend."

Schwartz's final point is that the true cost of substitution is seldom defined simply by the technical effort to port. "It is as much, or moreso defined by the economic cost of qualifying or requalifying applications running on one production stack to another production stack," he adds. 

"For example, as we continue porting Solaris onto IBM's Power architecture (demo coming soon!), the real issue we have to grapple with isn't the expense of moving our software over - it's the expense of requalifying all our, and all our ISV's infrastructure once the port is done.

We're hopeful IBM will support us (there are certainly enough of their employees reading these blogs to suggest they're paying attention) - and not close off choice and substitution to its customers."

"Were I a CIO facing these issues," Schwartz finishes, "I'd stay focused on the one thing definitively under my control - keeping the cost of substitution, of at least application portability, as close to zero as possible."

How?  "You guessed it, I'd write to Java. And I'd keep my options...open."

Only the true cynic will be reminded of the words in Alice in Wonderland, uttered not by a technology COO but by the Queen of Hearts:

"Words mean exactly what I want them to mean, neither more nor less."

One has the feeling that, as they say in journalistic circles, this one will run and run. Look for a response from IBM, among others, sometime soon!

More Stories By Linux News Desk

SYS-CON's Linux News Desk gathers stories, analysis, and information from around the Linux world and synthesizes them into an easy to digest format for IT/IS managers and other business decision-makers.

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Most Recent Comments
sporter 08/12/04 03:50:26 PM EDT

"Linux - the kernel" is open in every sense of the word. "Linux - the platform" is undefined... it doesn't exist. Linux is not an OS as we would traditionally define one... it is just the kernel. Even calling it GNU/BSD/X/Linux isn't correct if we're trying to describe an OS. The operating systems are the distributions. You might run a Linux kernel, but your OS is Red Hat or Debian or whatever. Each of these OS' are "open"... I could roll my own Red Hat-based distribution (see White Box Linux, for example)... but "Linux the platform" doesn't exist as a defined thing so it can't be open. (From what I can tell, LSB is trying to take us in the direction of having "Linux the platform", but it does't go far enough.) So, while Red Hat Linux may be an open platform, it is a different open platform from Debian Linux. Either way, when it comes to operating systems, the OSS-based ones are far more open than the non-OSS-based ones.

gopherman 08/10/04 01:59:47 PM EDT

This definition of "open" is certainly a valid point. By this definition Java is more open than Linux because Java promises and promotes substitution and choice and requires all who want to use the Java/J2EE brand to adhere to the same open standards and specifications, whether it be BEA, IBM, Oracle, Sun, JBoss, Borland, etc. While Linux is open source, it does not guarantee substitution. On the contrary. Red Hat, Suse, and other Linux vendors are actively moving their Linux distributions away from being commodities by adding their "value add," that by the way makes it harder for customers to substitute Red Hat for SuSE and vice versa. Open source as it is being implemented by the Linux community does not promote open platforms - that is if "open" means the ability to substitute and move from one product to the other. If the Linux brand would have been guarded as carefully as the Java brand, and all who wanted to use the brand would need to meet the basic criteria of adhering to the same reference implementation as J2EE app server vendors, then maybe Linux would be open too. Being able to move a Java application from the JVM from Sun to the JVM from IBM without any additional porting work means customer choice and openness. If I can't move an app from Red Hat to SuSE without hiring someone to mess with the code, then maybe Linux isn't as open as one might have thought.

sporter 08/10/04 10:30:20 AM EDT

It seems to me like he is describing open platforms, not open source. He's not even claiming to describe (or redefine) open source. He is pointing out that, to end users, open platforms are more important than open source. IMHO he's ignoring the fact that open source leads to open platforms... but that is another story.

John Robertson 08/10/04 08:53:16 AM EDT

Mr. Shwartz assumes that his customers are stupid. That's probably a good assumption in the long term, because any Sun customer with brains will be migrating to another platform while Sun publicly and spectacularly commits corporate suicide!

SUNstroke 08/09/04 06:52:42 PM EDT

Linux aficionados are soon going to know the name of Mr J Schwartz, at this rate, as well as they know that of Mr D McBride. Seems that 'open' is now to become a relative term - open as in door - thus leaving the way clear for some code to be regarded as having the door sufficiently ajar to warrant being 'open' in Schwartz's "Revised Dictionary of Computer Terms"

The expression "moving the goalposts" comes to mind...

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