Abstract

Split execution is a common model for providing a friendly environment on a foreign machine. In this model, a remotely executing process sends some or all of its system calls back to a home environment for execution. Unfortunately, hand-coding split execution systems for experimentation and research is difficult and error-prone. We have built a tool, Bypass, for quickly producing portable and correct split execution systems for unmodified legacy applications. We demonstrate Bypass by using it to transparently connect a POSIX application to a simple data staging system based on the Globus toolkit. 1. Introduction The split execution model allows a process running on a foreign machine to behave as if it were running on its home machine. Split execution generally involves three software components: an application, an agent, and a shadow. Figure 1 shows these components. Kernel Agent Application Local System Calls Calls System Trapped Kernel Shadow Local System Calls Other...

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