Ultra Mobile PCs present a new class of challenges for system designers since they are perceived to be versatile, low power devices and yet with the full functionality of larger handhelds/laptops. User experience of being ubiquitously connected and access to data anytime and anywhere is a fundamental requirement for this class of devices. However, access to data across wireless interfaces has a direct impact on battery life of such handheld devices. This paper presents detailed analysis of some of Linux file systems and data access across wireless. Based on our observations and analysis, we make some key design recommendations for file systems for Linuxbased Ultra-Mobile PCs.

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