[Nfd-dev] beforeExpirePendingInterest for forwarding strategy

[Navdeep Uniyal]

Hello Steve,

I think there are some implications of the PIT entry timer as we are doing:

if (!pitEntry->hasUnexpiredOutRecords()) 
    this->rejectPendingInterest(pitEntry);

In afterReceiveInterest.
If it is removed then only I can see the "beforeExpirePendingInterest" getting triggered. 




Best Regards,
Navdeep Uniyal


-----Original Message-----
From: steven.dibenedetto at gmail.com [mailto:steven.dibenedetto at gmail.com] On Behalf Of Steve DiBenedetto
Sent: Donnerstag, 20. August 2015 18:00
To: Navdeep Uniyal
Cc: Steve DiBenedetto; Junxiao Shi; nfd-dev at lists.cs.ucla.edu
Subject: Re: [Nfd-dev] beforeExpirePendingInterest for forwarding strategy

Junxiao, is there some sort of delay in the expired Interest cleanup?
I'm having the same problem with the following steps:

* Modify base Strategy's trigger to log WARN (just in case)
* Use Navdeep's overridden trigger (also WARN, different message)
* start NFD, set appropriate strategy for /, confirm with nfd-status
* run simple client that requests non-existent data, interest lifetime 1000ms, client sees timeout
* no WARN messages from NFD strategies, but NFD DEBUG logs for interest exist (onIncomingInterest, CS find/no-match,
onContentStoreMiss)


On Thu, Aug 20, 2015 at 8:26 AM, Navdeep Uniyal <navdeep.uniyal at neclab.eu> wrote:
> Hi Steve,
>
> I cross checked both the areas. Seems to be pretty fine as you suggested.  Please suggest if there are other ways so this method is triggered. And does on every timeout this should be called or it depends on some other factors. I my case I have switched off the CS caching just to experiment.
>
>
> Best Regards,
> Navdeep Uniyal
>
> -----Original Message-----
> From: steven.dibenedetto at gmail.com 
> [mailto:steven.dibenedetto at gmail.com] On Behalf Of Steve DiBenedetto
> Sent: Donnerstag, 20. August 2015 15:53
> To: Navdeep Uniyal
> Cc: Junxiao Shi; Steve DiBenedetto; nfd-dev at lists.cs.ucla.edu
> Subject: Re: [Nfd-dev] beforeExpirePendingInterest for forwarding 
> strategy
>
> Please make sure the header file's method prototype is:
>
> virtual void
>
> beforeExpirePendingInterest(shared_ptr<pit::Entry> pitEntry) 
> DECL_OVERRIDE;
>
>
> Also, (sorry, have to ask), did you enable TRACE logging for the specific strategy module/all modules in the nfd config?
>
>
> On Thu, Aug 20, 2015 at 6:44 AM, Navdeep Uniyal <navdeep.uniyal at neclab.eu> wrote:
>> Hi Junxiao,
>>
>>
>>
>> Below are the client and server configuration which I am using. As 
>> none of the files held by server matches with interest, all requests 
>> are getting timed out. While overriding the method, currently I am 
>> just trying to check if it works, may be later I will include more code as per the requirement.
>>
>>
>>
>>
>>
>>
>>
>> Client conf:
>>
>>
>>
>> ##########
>>
>> TrafficPercentage=100
>>
>> Name=/ndn/nle/file
>>
>> ExpectedContent=AAAAAAAA
>>
>> ##########
>>
>>
>>
>>
>>
>> Server Conf:
>>
>>
>>
>> ##########
>>
>> Name=/ndn/nle/file1
>>
>> Content=AAAAAAAA
>>
>> ContentBytes=5000
>>
>> ##########
>>
>> Name=/ndn/nle/file2
>>
>> Content=AAAAAAAB
>>
>> ContentBytes=5000
>>
>> ##########
>>
>> Name=/ndn/nle/file3
>>
>> Content=AAAAAAAC
>>
>> ContentBytes=5000
>>
>> ##########
>>
>> Name=/ndn/nle/file6
>>
>> Content=AAAAAAAF
>>
>> ContentBytes=5000
>>
>> ##########
>>
>>
>>
>>
>>
>> Method:
>>
>>
>>
>> void
>>
>> WeightedLoadBalancerStrategy::beforeExpirePendingInterest(shared_ptr<
>> p
>> it::Entry>
>> pitEntry)
>>
>>    {
>>
>>           NFD_LOG_TRACE("Entering
>> beforeExpirePendingInterest"<<pitEntry->getName());
>>
>>    }
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Best Regards,
>>
>> Navdeep Uniyal
>>
>>
>>
>> From: Junxiao Shi [mailto:shijunxiao at email.arizona.edu]
>> Sent: Donnerstag, 20. August 2015 14:36
>> To: Navdeep Uniyal; Steve DiBenedetto
>> Cc: nfd-dev at lists.cs.ucla.edu
>> Subject: RE: [Nfd-dev] beforeExpirePendingInterest for forwarding 
>> strategy
>>
>>
>>
>> Hi Navdeep
>>
>>
>>
>> beforeExpirePendingInterest should be triggered when PIT entry is 
>> unsatisfied after InterestLifetime.
>>
>> If you find it’s not triggered, give more details of your setup 
>> including the topology and the configuration files of traffic 
>> generator server and client.
>>
>>
>>
>> Yours, Junxiao
>>
>>
>>
>>
>> From: Navdeep Uniyal
>> Sent: Thursday, August 20, 2015 05:15
>> To: Steve DiBenedetto
>> Cc: nfd-dev at lists.cs.ucla.edu
>> Subject: Re: [Nfd-dev] beforeExpirePendingInterest for forwarding 
>> strategy
>>
>>
>>
>>
>>
>> Hi Steve,
>>
>>
>>
>> Thank you for your reply. I have a doubt regarding the triggering of 
>> this event. I am using Ndn Traffic Generator for testing my strategy.
>> I am overriding this method “beforeExpirePendingInterest” just to get 
>> some log trace. But I am unable to see anything in the logs. As per 
>> my understanding, for all the timed out interests this method should 
>> be triggered. Please if you can suggest what could be the potential 
>> issue for the method to be not logging anything for the timed out  interest messages.
>>
>>
>>
>>
>>
>> Best Regards,
>>
>> Navdeep Uniyal