[Mini-NDN] Not getting HIT scenario on CS for multiple interests with same name.

[Aman Maldar]

Perfect it works.
I added some logs and time calculations in cs.cpp file in cs::find()
function to study cache hit/miss scenario times.

Thanks Ashlesh.

On Mon, Nov 27, 2017 at 11:32 AM, Ashlesh Gawande (agawande) <
agawande at memphis.edu> wrote:

> You need to set the data freshness and interest lifetime in your code.
>
> For ndnpingserver you can set freshness using -x (see ndnpingserver -h).
>
> For ndnping set the timeout for interest lifetime (ndnping -h).
>
>
> Ashlesh
> ------------------------------
> *From:* Mini-NDN <mini-ndn-bounces at lists.cs.ucla.edu> on behalf of Aman
> Maldar <amanmaldar at gmail.com>
> *Sent:* Friday, November 24, 2017 5:09:27 PM
> *To:* Junxiao Shi
> *Cc:* mini-ndn at lists.cs.ucla.edu
> *Subject:* Re: [Mini-NDN] Not getting HIT scenario on CS for multiple
> interests with same name.
>
> Thanks you Junxiao,
> That is correct. Though  I have a really silly question regarding the
> correct syntax.
> I am trying to override default value for freshness. I spent good amount
> of time figuring this out, but no luck.
> I am getting search results for ndnSim, but not for mini-ndn.
> I made changes in /usr/local/etc/ndn/nfd.conf file
>
> Is this the way I write it? Additionally , how do I set interestLifetime
> as well?
>
>
> *; The tables section configures the CS, PIT, FIB, Strategy Choice, and
> Measurements **tables*
> *{*
> *  ; ContentStore size limit in number of packets*
> *  ; default is 65536, about 500MB with 8KB packet size*
> *  cs_max_packets 65000*
> *  //FreshnessPeriod 10000mS     //WHAT is correct syntax?*
> *  //FreshnessPeriod=11000mS*
>
> I am new to mini-ndn. I appreciate your time and help.
>
>
> On Fri, Nov 24, 2017 at 9:35 AM, Junxiao Shi <shijunxiao at email.arizona.edu
> > wrote:
>
> Hi Aman
>
> I am trying to see if I request 2 interest packets with the same name back
> to back, the second interest should be satisfied at the requesting node
> itself.
>
> Yes, but only if the cached Data satisfies the Interest selectors.
>
>
> *Steps followed :*
> > sudo minindn
> mini-ndn> d ndnpingserver /ndn/d-site/d &
> mini-ndn> a ndnping /ndn/d-site/d -c1 -n 55555
>
> ndnpingserver is invoked with default settings: FreshnessPeriod of the
> Data packet is 1000ms.
>
>
> *host A get the contents back . with RTT 45ms apprx.*
> cs::Insert() adds the content to the CS.
>
> According to screenshot, this occurs at 1511480463.948688.
>
>
> Now I immediately execute the same request again, keeping sequence number
> same.
>  mini-ndn> a ndnpin /ndn/d-site/d -c1 -n 55555
>
>  ndnping is invoked with default settings: Interest carries MustBeFresh
> selector.
>
> Now I see in Content store log, the cs::Find() does not finds entry in CS.
> (I believe it should be already there)
>
> The cached Data has become stale at 1511480464.948688. When processing the
> Interest at 1511480467.711965, the Data does not satisfy the Interest
> because it violates MustBeFresh selector. Hence, the CS rightfully returns
> "no-match".
>
>
> The packet goes all the way to host D, and again *when data packet is
> returned to host A, cs::insert() is called on host A*.
>
> *Expected outcome*.
> second interest should be satisfied by cs::Find() at host A itself with
> very small RTT.
>
> Attaching log screenshot.
>
> [image: Inline image 1]
>
> Next time paste the log as text, not screenshot or attachment.
>
>
>
> Any idea if I am doing something wrong? Thank you in advance.
>
>
> Yours, Junxiao
>
>
>
>
> --
> *Regards,*
> * Mr. Maldar Aman M.*
> *University of Massachusetts, Lowell*
>



-- 
*Regards,*
*Mr. Maldar Aman M.*
*University of Massachusetts, Lowell*
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