As one of the early participants in the collaborative programming movement, Tiemann has watched open-source software outgrow its renegade origins to become an integral part of that most establishment of computing companies, IBM.
Winning respect is now the least of the open-source movement's concerns. Future struggles may involve political and political challenges in copyright law or digital rights management or intellectual property issues, according to Tiemann, nowadays chief technology officer at Linux seller Red Hat.
Is the Linux community going to become more, or less dependent on the skills of Linus Torvalds?I think it will be as dependent. It's hard to imagine it being more dependent. It's also not really clear that it needs to be less dependent. What Linus does is maintain the ever-unpopular position of rejecting stuff that doesn't belong in the kernel (the core of an operating system). The skills the Linux community will ultimately depend on are more his ability to reject than his ability to write any new code.
Will there come a point when the code becomes so unmanageable that it prevents the community from making major improvements without breaking too many other things?
A year ago, when Linux was streaking upwards, when it was just beginning to have the varsity-level characteristics of the proprietary Unix world, the question people asked me was, "How do you know you'll be able to stay on this track, or are you going to plateau the same way the rest of the Unix kernels did?" At that time, I did not have an answer to that question. I now do.
The key discriminating function of the main Linux maintainers--which include Linus Torvalds--is their absolute no-compromise position on clean interfaces and forcing people who want to go two steps forward to not go one step back. What this means is, in many kernel mailing-list discussions I've seen over the last 12 months, when somebody proposes a solution that solves some problems but brings with it other problems, generally that solution is rejected until the other problems are addressed.
A great example of this is two years ago when a number of groups approached Linus, each trying to be the approved security mechanism for Linux. The NSA (National Security Administration) was showing their solution, HP (Hewlett-Packard) was showing their solution and Immunix/Wirex was showing theirs--and he told them all, "The fact that each of you is trying to get me to adopt your approach is proof that none of these approaches is correct. The only possible correct approach is one single approach that supports each of the different things you're trying to do. Come back when you've defined a set of interfaces that supports each of your systems, and I'll support that."
How does the open-source business model look when you compare 1989 to the present and future?
In 1989, it was 100 percent vision. Today, it's getting close to 100 percent reality. When we started in 1989, our sales pitch was much more evangelical. Nobody in the enterprise market buys until everybody else does. In 1989, I can tell you, nobody was buying. Today the reports from Wall Street, from manufacturing companies, from various governments around the world...all point to the fact that the open-source model is working.
Then is the battle over open-source won?
I wouldn't say that. We have managed to secure our spot in the Olympics.
What political challenges will open-source face in copyright law or digital rights management or intellectual property issues?
Open source is just one of many categories that brings into focus the public versus private debate. Today, libraries are fighting for rights to provide the same access to information being released, only in a digital media form compared with information released in traditional forms. Fifty years ago, certain court cases established that yes, by golly, a library has the right to purchase a book and make it available for lending because of its public service.
But there were certainly points in time when booksellers didn't want libraries to exist, because they wanted to sell books to every person in the U.S. A doctrine was established that there was a balance between public and private interests, and that libraries served the public interest. Of course, they also respected the private interests by acquiring the materials that they lend in a legal fashion.
With new digital rights management and the DMCA (Digital Millennium Copyright Act), these companies are using technology to prevent libraries from fulfilling a role they have always fulfilled using more traditional technologies. The question of open-source and IP (intellectual property) and digital rights management is in no way limited to Linux or Red Hat or open source.
What's the biggest problem in Linux that will be fixed in the next three years?
There had been some outstanding technical challenges around threading (in which a program has several programming tasks, or threads, running simultaneously), around SMP (the ability for Linux to run on mammoth systems with numerous processors and lots of memory), around kernel scheduling (how the operating system juggles between different tasks), around network stack performance (how fast network traffic is processed).
Almost all of those problems have been solved so well it's almost mind-boggling.
In three years, will Linux run well on 32-processor servers?
I think it'll run well in less time than that.
How about 64-processor servers?
If (Oracle CEO) Larry Ellison's right about 9i RAC (the Oracle 9i Database with Real Application Clusters)--and some benchmarks suggest that if he's not right, he's not far wrong--then people are going to have the ability to deploy 64-way Oracle databases by buying two 32-way systems or by buying 32 two-way systems.
Do you think Linux will ever displace Microsoft on the desktop?
That's not a technology question. The big bugaboo there is related to the (antitrust) testimony I gave in February.
Which do you think will prevail, Berkeley Software Distribution (BSD)-style licenses or General Public Licenses (GPL)-style?
The Berkeley license permits privatization of technology, which means it permits a company to exclude others from their own development project; whereas the GPL prevents people from being excluded from a development project. Generally important software will be under GPL, and specifically important software will wind up under BSD.
Which will be more relatively popular?
I think GPL will remain the most popular. I think it is going to be the generally important software that continues to be covered by it.
What part will you play in the future development of an open platform?
I've talked to a lot of CIOs still suffering from the hangover of the so-called Unix open-systems wars. The fact is, the fragmentation of Unix was a disaster both for Unix as a platform and for customers who purchased a lot of expensive proprietary systems. One (our) roles is keeping the platform truly open, keeping the integrity of what it means to be an open standard really solid.
Politics aside, what challenges will pragmatists face in the next three years?
The industry right now is clearly out of balance. Many people would argue now that there is an oversupply of technology and an undersupply of quality. There's undersupply of competition, there's oversupply of incompatibility.
We're definitely on the cutting edge with respect to security. The fact is, companies aren't spending as much on security as they know they should. My supposition is that the reason people are spending so little on security is because the existing proprietary platforms offer such poor security alternatives, meaning they're either not very secure or not easy to implement, or not easy to maintain, or not flexible or not compatible. The community that has had experience in making technology ubiquitous through open models is the community that's going to find and deliver security solutions that warrant responsible spending by IT organizations.
So (Sun Microsystems') Solaris is less secure than Linux?
People have reported on numerous occasions the cost differential between a proprietary system and a Linux-based system. People don't want to spend money on things that are considered too expensive. Even if Sun does have adequate security in one dimension, the overall commercial offering is just not very attractive compared to what the IT departments are demanding.
How will the open-source community push security forward?
There's a lot of work going on surrounding a development called Security-enhanced Linux. This has been adopted by the community. People are using Debian (a free operating system that uses the Linux kernel) as a base, then feeding that through and into and back from the community.
Where else will the open-source community be coming up with new ideas?
Manageability. I think there was little incentive for the open-source community to worry about building large-scale management platforms when Linux was only running on individual machines clandestinely. Now that people are deploying Linux by the thousands in their organizations, there is an incentive to work on manageability, and I think the Linux approach is going to be very different from the old approach.
How?
In the old approach, the manageability tools had to necessarily treat the operating system as a hostile platform. You've got all these proprietary Unix platforms evolving independently. Plus, each of these different operating systems was trying to build its own independent manageability framework for that one operating system. Because of the high degree of fragmentation of Unix, this meant a lot of resources were being spent very duplicatively, the result being that multiplatform, proprietary management platforms were very expensive.
Because of the open-source model, a lot of people can collaborate on a common way of building things. Because the source code for Linux is completely in the open, it is not necessary to treat the operating system as a complete black box. I think we can have cooperative manageability as opposed to adversarial manageability.
