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With NFS version 4, the IETF has provided the first openly defined filesystem protocol. NFSv4 draws upon previous versions of NFS along with characteristics of other distributed filesystems to provide a useful, flexible framework for today's client and server environments. NFSv4 provides strong security through the use of either Kerberos V5, SPKM-3, or LIPKEY. NFSv4 combines the previously disparate set of protocols surrounding NFS into a single protocol. NFSv4 also allows for adaptation to future needs via minor versioning. The details of these features and the rest of the protocol will be reviewed as well as the performance characteristics of today's NFSv4 environment.

People debate regularly about whether or not open source software is"good for business," and how one makes money on something given away"for free." They raise concerns over the commoditization effects andportray a gloomy future where open source software will "eat its way"up a stack of functionality until software is valueless.

This talk looks at historical open source companies, then steps backto look under the hood at a broader business context for the dynamicsat work to provide a business model for open source software. Part ofthe story behind Microsoft's community projects will be told along theway.

Exponential improvements in networking and the management cost and complexity of PCs are driving the reemergence of thin clients. But this is not a return to the past of dumbed-down terminals interfaces and limited functionality. Modern thin clients can provide rich PC application functionality and enable new application services while simplifying system administration and improving system security. These benefits arise from a model of running all application logic on servers which then simply send display updates to the clients. I will examine how thin clients can address today's IT infrastructure problems and I will then discuss challenges and opportunities.

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Mac OS X "Tiger" contains hundreds of new features, many of them in the open-source UNIX "underpinnings" of the system. This talk will discuss new features in the Kernel, new support for rapid indexing and searching of filesystem data, extended file attribute management, strategies for increased performance and 64 bit application support, various software development tool updates, and Tiger's new subsystems for application logging and daemon/service control.