Capturing and analyzing I/O data
A short overview of how to capture and to analyze the I/O trace data.
About this task
Capturing and analyzing the I/O data involves different tools:
- blktrace
- captures the data from the running kernel, optionally sends it over the network to minimize the impact on the running system and stores the data in a binary format.
- blkparse
- parses the data captured by blktrace, displays it in a readable format, adds a summary and creates data usable by btt.
- btt
- does further analysis and can create histogram data for plotting with Grace4 or other plotting tools.
See the blktrace documentation for more examples of what data is available.