This page (revision-37) was last changed on 23-Apr-2022 17:06 by Harry Metske

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Page References

Incoming links Outgoing links
Apache Brooklyn...nobody
Apache Brooklyn

Version management

Difference between version and

At line 175 changed one line
Eventually this comes down to the following yaml (that you can submit to brooklyn):
Eventually this comes down to the following yaml (that you can submit to brooklyn), after fiddling a bit with the settings and looking at brooklyn's behaviour :
%%collapsebox
__yaml for AutoScalingPolicy__
At line 196 changed 2 lines
metricLowerBound: 10
metricUpperBound: 100
metricLowerBound: 3
metricUpperBound: 5
At line 200 changed 2 lines
resizeUpStabilizationDelay: 10000
resizeDownStabilizationDelay: 20000
resizeDownIterationIncrement: 1
resizeUpIterationIncrement: 1
resizeUpStabilizationDelay: 50000
resizeDownStabilizationDelay: 70000
At line 207 changed one line
creationScriptUrl: https://bit.ly/brooklyn-visitors-creation-script
creationScriptUrl: https://bit.ly/brooklyn-visitors-creation-script}}}
/%
Testng was done by throwing this simple script at the nginx endpoint :
%%prettify
{{{
while true;
do
curl --silent --show-error http://172.17.0.226:8000/db.jsp >/dev/null && echo -n "." ;
sleep 0.15s;
done
At line 225 added 19 lines
%%
In short the behaviour:
* we fire up the whole thing
* we start one instance of this loadrunner script driving the "webapp.reqs.perSec.windowed.perNode" to about 3
* start more instances of the loadrunner script
* the "webapp.reqs.perSec.windowed.perNode" goes up to 7
* after 50 seconds an additional Tomcat instance is fired up
* the "webapp.reqs.perSec.windowed.perNode" drops below 5 now, and we keep running 3 Tomcat instances
* we start more instances of the loadrunner script, the "webapp.reqs.perSec.windowed.perNode" goes up to above 5 again
* after 50 seconds again an additional Tomcat is started
* throwing more load at it does not make more Tomcat's since we set the maxPoolSize to 4
* we kill a couple of loadrunner scripts until the "webapp.reqs.perSec.windowed.perNode" drops below 3
* then one Tomcat is killed and we are back to 3 instances
* "webapp.reqs.perSec.windowed.perNode" goes to between 3-5 and we remain at 3 instances
* we kill more loadrunner scripts until "webapp.reqs.perSec.windowed.perNode" drops below 3
* an additional Tomcat is killed
* we stop the load completely, driving "webapp.reqs.perSec.windowed.perNode" to 0
* we keep running 2 Tomcat instances, since minPoolSize is 2
This page (revision-37) was last changed on 23-Apr-2022 17:06 by Harry MetskeTop