InfoWorld: No one is permitted to take ZFS and port it to Linux?

Murdock: Well, today the licenses are not compatible with each other, so that can't be done.

InfoWorld: What are the differences in the licensing?

Murdock: Linux is governed by the GNU Public License, or GPL, and open source is governed by the CDDL, the Common Development and Distribution License.

InfoWorld: Why CDDL and not GPL like you did for Java?

Murdock: Well, OpenSolaris was open sourced, what, a year and a half before Java? There's a desire in some of our customer base to have a license that allows you to build value-added products on top of OpenSolaris. And so the ability to easily drive commercial versions based on Solaris technology was one of the drivers behind the CDDL. And basically, the CDDL is just a slightly modified version of the Mozilla Public License, so it is an OSI-approved open-source license. It's no more or less open source than a GPL is. But it turns out that the GPL is very restrictive, and so you can't combine some of the things that the CDDL says with some of the things that the GPL says.

InfoWorld: What are you expecting developers to do with Open Solaris?

Murdock: I think first of all, there's going to be a lot of experimentation now that the barriers are gone for a Linux developer, a Linux user to take a look at what OpenSolaris has to offer. We are spending a lot of time understanding what those developers are doing; namely, how they are moving up the stack and working in environments like PHP and Ruby on Rails. So how do we describe the capabilities of Solaris, such as DTrace, in a way that's relevant to them? For example, OpenSolaris is going to be an ideal environment for Web-facing applications because we've moved the DTrace functionality up into somebody's Web application frameworks. And if you think about it, the basic problem behind a Web application is, particularly if you are successful, how do you scale? If you build an application, you put it out there, you gain a large user base, people start hitting your servers, you have to figure out where in your code you need to optimize so that you can scale along with it. DTrace offers those kinds of developer's capabilities that are not available on any other operating system.

InfoWorld: What do you see happening with the Amazon-based hosted version of OpenSolaris?

Murdock: That represents yet another barrier to entry being removed. Now you can take advantage of these same capabilities without necessarily having to provision your own infrastructure. And it's all a part of the same trends that you've seen coming out of Sun over the last several years. The embrace of AMD and Intel, Linux, Windows. I mean, it's all about how do we get Sun technology as broadly adopted as possible, no matter what the vehicle?