[Mini-NDN] topology result

sepehr abdous sepehrabdous1375 at gmail.com
Thu Nov 24 12:27:18 PST 2016 

about (2) you mean that I should write the following experiment with
different faces?
from ndn.experiments.experiment import Experiment
from ndn.nlsr import Nlsr

import time

class fail(Experiment):

    def __init__(self, args):
        args["nPings"] = 140000
        Experiment.__init__(self, args)

        self.PING_COLLECTION_TIME_BEFORE_FAILURE = 60
        self.PING_COLLECTION_TIME_AFTER_RECOVERY = 20

    def run(self):
        self.startPctPings()

        # After the pings are scheduled, collect pings for 1 minute
        time.sleep(self.PING_COLLECTION_TIME_BEFORE_FAILURE)

        # Bring down CSU
        for host in self.net.hosts:
            if host.name == "node4":
                self.failNode(host)
                break

        # CSU is down for 2 minutes
        time.sleep(120)

        # Bring CSU back up
        for host in self.net.hosts:
            if host.name == "node4":
                self.recoverNode(host)

                for other in self.net.hosts:
                    if host.name != other.name:
                        self.ping(host, other, self.PING_COLLECTION_TIME_
AFTER_RECOVERY)

        # Collect pings for more seconds after CSU is up
        time.sleep(self.PING_COLLECTION_TIME_AFTER_RECOVERY)

Experiment.register("failone", fail)


On Thu, Nov 24, 2016 at 10:32 AM, Ashlesh Gawande (agawande) <
agawande at memphis.edu> wrote:

> 1) I think the experiment from paper was run on real testbed which would
> explain the outliers in the RTT.
>
>
> 2) The experiment for blue line is not correct as it also a failure
> experiment. The difference is the number of faces.
>
> For blue line the experiment would be the same as the red line except you
> would run mini-NDN with option --faces 0 (i.e. multipath). For the red line
> you would run with --faces 1 (i.e. single path).
>
>
> Blue line:
>
> sudo minindn --experiment=failureExp --faces 0
>
>
> Red line:
>
> sudo minindn --experiment=failureExp --faces 1
>
>
> 3) I am not sure about the density but the figure on the paper should not
> have more than 200 pings. Maybe the small size of the figure and different
> point size is leading to more observed density.
>
> Another case could be that there are some timeouts in your experiment that
> are not represented on the graphs?
>
>
> Ashlesh
> ------------------------------
> *From:* Mini-NDN <mini-ndn-bounces at lists.cs.ucla.edu> on behalf of sepehr
> abdous <sepehrabdous1375 at gmail.com>
> *Sent:* Wednesday, November 23, 2016 4:06:01 PM
> *To:* mini-ndn at lists.cs.ucla.edu
> *Subject:* Re: [Mini-NDN] topology result
>
> also my experiments codes are:
> for blue points:
>
>
> from ndn.experiments.experiment import Experiment
> from ndn.nlsr import Nlsr
>
> import time
>
> class pingallreg(Experiment):
>
>     def __init__(self, args):
>         args["nPings"] = 200000
>         Experiment.__init__(self, args)
>
>     def run(self):
>         self.startPctPings()
>         time.sleep(200)
>
> Experiment.register("wofail", pingallreg)
>
> and for red points which involve failure:
>
> from ndn.experiments.experiment import Experiment
> from ndn.nlsr import Nlsr
>
> import time
>
> class fail(Experiment):
>
>     def __init__(self, args):
>         args["nPings"] = 140000
>         Experiment.__init__(self, args)
>
>         self.PING_COLLECTION_TIME_BEFORE_FAILURE = 60
>         self.PING_COLLECTION_TIME_AFTER_RECOVERY = 20
>
>     def run(self):
>         self.startPctPings()
>
>         # After the pings are scheduled, collect pings for 1 minute
>         time.sleep(self.PING_COLLECTION_TIME_BEFORE_FAILURE)
>
>         # Bring down CSU
>         for host in self.net.hosts:
>             if host.name == "node4":
>                 self.failNode(host)
>                 break
>
>         # CSU is down for 2 minutes
>         time.sleep(120)
>
>         # Bring CSU back up
>         for host in self.net.hosts:
>             if host.name == "node4":
>                 self.recoverNode(host)
>
>                 for other in self.net.hosts:
>                     if host.name != other.name:
>                         self.ping(host, other, self.PING_COLLECTION_TIME_
> AFTER_RECOVERY)
>
>         # Collect pings for more seconds after CSU is up
>         time.sleep(self.PING_COLLECTION_TIME_AFTER_RECOVERY)
>
> Experiment.register("failone", fail)
>
>
>
> On Thu, Nov 24, 2016 at 1:31 AM, sepehr abdous <sepehrabdous1375 at gmail.com
> > wrote:
>
>> Hello all,
>> I'm new to mini-ndn and I'm trying to implement the following topology
>>
>> [image: Inline image 2]
>> I implemented it with the following information:
>> [image: Inline image 3]
>> and based on the paper the expected results on ping is :
>> [image: Inline image 4]
>> but when I implement it I get the following image
>>
>> [image: Inline image 5]
>> and as you can see there are some problems:
>> (1) the values on the y-axis is much higher than in the paper, I figured
>> out that It's caused by the delay, I set the delay for every link to 20ms
>> so the values are around 80ms but when I set the delay to 0ms the values
>> are around 10ms but the swing of values become more and values are not
>> united like when the delay is 20ms
>> (2) as you can see when node4 fails we have some values that shows
>> something happened:
>> [image: Inline image 6]
>> but this values doesn't exist in my figure.
>> (3) the density of red points in my figure isn't the same in all aspects.
>> can you please help me with this problems.
>> Thank you
>>
>
>
>
> --
> Sepehr Abdous
> Faculty: abdous at ce.sharif.edu
> Yahoo mail: sepehrabdous at yahoo.com
> Cellphone:+989194030591
> School of computer engineering
> Sharif University of Technology
> Tehran, Iran
>



-- 
Sepehr Abdous
Faculty: abdous at ce.sharif.edu
Yahoo mail: sepehrabdous at yahoo.com
Cellphone:+989194030591
School of computer engineering
Sharif University of Technology
Tehran, Iran
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