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Benchmark.bonnie in 'raw' format


= Description =
Bonnie++ is a filesystem benchmark that measures basic speed of several
operations, including data read and write speed, the number of seeks per second, and the number of file metadata operations per second.

= Resources =
 * [[https://www.linux.com/news/using-bonnie-filesystem-performance-benchmarking|Using Bonnie++ for filesystem performance benchmarking]], by Ben Martin, Linux.com, July 2008 (accessed Oct. 2017)
 * [[https://en.wikipedia.org/wiki/Bonnie%2B%2B|Bonnie++ wikipedia entry]]
 * [[https://www.coker.com.au/bonnie++/|Bonnie++ home page]]

= Results =

= Tags =
 * filesystem

= Dependencies =
Bonnie has no build dependencies.

There is a separate command line option for running it as the 'root' user.

Bonnie uses the following test variables at runtime:
 * BENCHMARK_BONNIE_MOUNT_BLOCKDEV - name of block device where filesystem to be tested in located, or "ROOT"
 * BENCHMARK_BONNIE_MOUNT_POINT - directory name where the filesystem should be mounted (if needed), and the tests run.
 * BENCHMARK_BONNIE_SIZE - specifies the size, in megabytes, of the files used for IO performance measurements
   * this is the parameter to the -s command line option
 * BENCHMARK_BONNIE_RAM - specifies the size of the board's RAM in megabytes, or "0" if ram size sanity checks should be disabled
   * this is the parameter to the -r command line option
 * BENCHMARK_BONNIE_NUM_FILES - is a colon-separate 4-tuple indicating the number of files, the file max size, the file min size, and the number of directories to spread the files into, for metadata tests
   * the default value, if not specified is: "16:0:0:1".  This results in 16K files with maximum and minimum size 0, in 1 directory.
 * BENCHMARK_BONNIE_ROOT - should be set to "true" if the bonnie should try to execute as the root user on the board.

= Status =
 * OK

= Notes =
Notes: If a test executes too quickly, bonnie does not report the result, and instead produces '+++++'s in the entries for those tests. Specifically, bonnie will emit this if a test result was less than .5 (MinTime in the source code).
If this happens for you, consider using or writing a spec that increases the size of the files, or the number of files used for tests.


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