PERFORMANCE

Type of Work	Item	Explanation	Documentation
Research	Fast writes: log-based I/O	When I/O is write-intensive and/or writes to several different datasets occur at the same time. Two approaches identified: (1) write in to groups to log files, (2) write in background (active buffering). Requires mods to apps and library. Steps: (1) trap I/O calls, (2) log I/O calls, (3) replay in background. Need separate thread, or possibly spawn a separate process.	n/a

Type of Work

Research

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Item

Fast writes: log-based I/O

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Explanation

When I/O is write-intensive and/or writes to several different datasets occur at the same time. Two approaches identified: (1) write in to groups to log files, (2) write in background (active buffering). Requires mods to apps and library. Steps: (1) trap I/O calls, (2) log I/O calls, (3) replay in background. Need separate thread, or possibly spawn a separate process.

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Documentation

n/a