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author | 2015-09-11 15:59:04 -0400 | |
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committer | 2015-09-16 12:41:10 +0000 | |
commit | a042da193676747320ca7cac75d1c70ade9a3c04 (patch) | |
tree | d5a9f0f9cfbe36f1f346d7082fe7c56fef538c05 /docs/to-be-reorganized/Yardstick_task_templates.rst | |
parent | 2aa1cd3922f26b9d8c9bdad310463caa5eeb8136 (diff) |
Move documentation to new sphinx build
TODO: Reorganize documentation into properly named subfolders
TODO: Add logos to documentation (see index.rst for example)
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JIRA:RELENG-15
Change-Id: I8fd519393416e2ac2b3ada6fe0670aa4d038fc87
Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>
Diffstat (limited to 'docs/to-be-reorganized/Yardstick_task_templates.rst')
-rwxr-xr-x | docs/to-be-reorganized/Yardstick_task_templates.rst | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/docs/to-be-reorganized/Yardstick_task_templates.rst b/docs/to-be-reorganized/Yardstick_task_templates.rst new file mode 100755 index 000000000..538937fd7 --- /dev/null +++ b/docs/to-be-reorganized/Yardstick_task_templates.rst @@ -0,0 +1,141 @@ +Task Template Syntax +==================== + +Basic template syntax +--------------------- +A nice feature of the input task format used in Yardstick is that it supports the template syntax based on Jinja2. +This turns out to be extremely useful when, say, you have a fixed structure of your task but you want to +parameterize this task in some way. +For example, imagine your input task file (task.yaml) runs a set of Ping scenarios: + +:: + + # Sample benchmark task config file + # measure network latency using ping + schema: "yardstick:task:0.1" + + scenarios: + - + type: Ping + options: + packetsize: 200 + host: athena.demo + target: ares.demo + + runner: + type: Duration + duration: 60 + interval: 1 + + sla: + max_rtt: 10 + action: monitor + + context: + ... + +Let's say you want to run the same set of scenarios with the same runner/context/sla, +but you want to try another packetsize to compare the performance. +The most elegant solution is then to turn the packetsize name into a template variable: + +:: + + # Sample benchmark task config file + # measure network latency using ping + + schema: "yardstick:task:0.1" + scenarios: + - + type: Ping + options: + packetsize: {{packetsize}} + host: athena.demo + target: ares.demo + + runner: + type: Duration + duration: 60 + interval: 1 + + sla: + max_rtt: 10 + action: monitor + + context: + ... + +and then pass the argument value for {{packetsize}} when starting a task with this configuration file. +Yardstick provides you with different ways to do that: + +1.Pass the argument values directly in the command-line interface (with either a JSON or YAML dictionary): + +:: + + yardstick task start samples/ping-template.yaml --task-args '{"packetsize": "200"}' + +2.Refer to a file that specifies the argument values (JSON/YAML): + +:: + + yardstick task start samples/ping-template.yaml --task-args-file args.yaml + +Using the default values +------------------------ +Note that the Jinja2 template syntax allows you to set the default values for your parameters. +With default values set, your task file will work even if you don't parameterize it explicitly while starting a task. +The default values should be set using the {% set ... %} clause (task.yaml).For example: + +:: + + # Sample benchmark task config file + # measure network latency using ping + schema: "yardstick:task:0.1" + {% set packetsize = packetsize or "100" %} + scenarios: + - + type: Ping + options: + packetsize: {{packetsize}} + host: athena.demo + target: ares.demo + + runner: + type: Duration + duration: 60 + interval: 1 + ... + +If you don't pass the value for {{packetsize}} while starting a task, the default one will be used. + +Advanced templates +------------------ +Yardstick makes it possible to use all the power of Jinja2 template syntax, including the mechanism of built-in functions. +As an example, let us make up a task file that will do a block storage performance test. +The input task file (fio-template.yaml) below uses the Jinja2 for-endfor construct to accomplish that: + +:: + + #Test block sizes of 4KB, 8KB, 64KB, 1MB + #Test 5 workloads: read, write, randwrite, randread, rw + schema: "yardstick:task:0.1" + + scenarios: + {% for bs in ['4k', '8k', '64k', '1024k' ] %} + {% for rw in ['read', 'write', 'randwrite', 'randread', 'rw' ] %} + - + type: Fio + options: + filename: /home/ec2-user/data.raw + bs: {{bs}} + rw: {{rw}} + ramp_time: 10 + host: fio.demo + runner: + type: Duration + duration: 60 + interval: 60 + + {% endfor %} + {% endfor %} + context + ... |