The loader python program will generate a continuous sequence of lines
using the specified output method, either to stdout (default), a file,
or via syslog APIs.
Periodically, it will report statistics about the rate at which it has generated the output. It offers an ability to adjust how often it reports, and where to issue the reports. One can ask for reports to stdout, to stderr, another file, or via syslog.
The size of the log lines is an optional parameter to the program, as well as whether to generate them all of a fixed size, or using a Gaussian distribution, with the size being the mean, optionally providing the standard deviation.
One can provide a unique ID for the instance of the loader to embed in the generated output. Without one provided the loader will generate a 32 character UUID by default.
The verify-loader program in turn accepts a sequence of lines as
emitted by one or more the loader programs, and verifies the emitted
lines are receives in order, without any duplicates or skipped lines.
Emit logging load to /dev/null:
$ ./loader --output=/dev/null --report=stderr
loader stat: 0000010000 1894.830 1894.830
loader stat: 0000020000 1903.279 1899.045
loader stat: 0000030000 1896.060 1898.049
loader stat: 0000040000 1900.117 1898.565
loader stat: 0000050000 1880.544 1894.934
Rate-limit to 10 per second, reporting every 40 logs entries:
$ ./loader --output=/dev/null --report=stderr --msgpersec=10 --report-interval=40
loader stat: 0000000040 10.242 10.242
loader stat: 0000000080 10.000 10.119
loader stat: 0000000120 9.998 10.079
loader stat: 0000000160 10.003 10.060
loader stat: 0000000200 10.006 10.049
Simple emission of lines to stdout and have the sequence verified:
$ ./loader | ./verify-loader
8f8f2882e66643d08c205804f7f5540a : 100 0 0
8f8f2882e66643d08c205804f7f5540a : 200 0 0
8f8f2882e66643d08c205804f7f5540a : 300 0 0
8f8f2882e66643d08c205804f7f5540a : 400 0 0
8f8f2882e66643d08c205804f7f5540a : 500 0 0
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