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IFogSim features questions #22
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Hello, I am trying to use IFogSim to simulate fog scenarios. Because I don't find a lot of documentation, I have a few questions about IFogSim's models and how to measure some performance metrics.
tuple.getSubmissionTime()
andtuple.getFinishTime()
. Are these appropriate or should I measure request execution duration with other methods?sendUpFreeLink/sendUp
andsendDownFreeLink/sendDown
ofFogDevice.java
for the start of transmission, and the arrival time inProcessTupleArrival
ofFogDevice.java
. Is this approach appropriate or should I measure request transmission durations with other methods?double schedulingInterval
parameter. I observe its value is 10 in most examples, and a value of 0 leads to an infinite loop. I did not find a reference explaining how to set this value. Can you explain this parameter so that I can use it correctly?FogDevice.java
. Is there an option to send the two messages concurrently so they arrive at the same time (but take twice as long to be sent)?iFogSim2: An extended iFogSim simulator for mobility, clustering, and microservice management in edge and fog computing environments
, case study 2 (Cardiovascular Health Monitoring) mentions the use of Wi-Fi gateways:a physical topology of 7 Fog nodes is used, which consists of 6 Wifi gateways (tier-2 nodes) [...] Also, 25 smartphones with randomly generated locations connect with the Wifi gateways to send ECG sensor data
I did not find information on whether or not Wi-Fi communications differ from Wired communications in IFogSim. Do the Wi-Fi nodes share a common communication link when they communicate (so they cannot communicate two at a time with their gateway) or not? If they are different, how do I define a set of Wi-Fi stations and their access point?Thank you for answering (some) of these questions, I would appreciate it!
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