[Nfd-dev] Getting onContentStoreMiss even if the data is in ContentStore

Tue Sep 19 19:59:09 PDT 2017

Hi Obaid,

What's the data freshness period (if not set, it is set to 0 ms by default after this issue was implemented: https://redmine.named-data.net/issues/3944)?

(Assuming must be fresh is set on the interest, content store will not answer).

Ashlesh

________________________________
From: Nfd-dev <nfd-dev-bounces at lists.cs.ucla.edu> on behalf of S. Obaid <obaidasyed at gmail.com>
Sent: Tuesday, September 19, 2017 8:51:35 PM
To: <nfd-dev at lists.cs.ucla.edu>
Subject: [Nfd-dev] Getting onContentStoreMiss even if the data is in ContentStore

Hello all,

I am observing some strange forwarding behaviour of NFD. I am working on a star topology of 4 nodes (1 middle and three leaf nodes) where each node is running NFD and the routing is setup in a way that the leaf nodes talk to each other via middle node.
In this particular scenario two nodes (attached to face 333 and 273) requesting the same data from the third node.
Here is what I am observing at the middle node.

At 1 the middle node got the interest from node 1 and as there was no matching Content in CS, it was forwarded to the Producer.
At 4 the middle node got the data back, which is forwarded towards the consumer in step 6.
At 8, the middle node got the same interest from node 2. However, instead of serving it from the CS; the interest was forwarded to the Producer again.
Shouldn't it be served from the CS as we have already got the data in step 4. Any idea what's going wrong here?

  1.  1505869006.866421 DEBUG: [Forwarder] onIncomingInterest face=333 interest=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  2.  1505869006.866489 DEBUG: [Forwarder] onContentStoreMiss interest=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  3.  1505869006.866537 DEBUG: [Forwarder] onOutgoingInterest face=303 interest=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  4.  1505869007.849591 DEBUG: [Forwarder] onIncomingData face=303 data=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  5.  1505869007.849650 DEBUG: [Forwarder] onIncomingData matching=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  6.  1505869007.849687 DEBUG: [Forwarder] onOutgoingData face=333 data=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  7.  1505869007.949745 DEBUG: [Forwarder] onInterestFinalize interest=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042 satisfied
  8.  1505869008.050235 DEBUG: [Forwarder] onIncomingInterest face=273 interest=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  9.  1505869008.050316 DEBUG: [Forwarder] onContentStoreMiss interest=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  10. 1505869008.050363 DEBUG: [Forwarder] onOutgoingInterest face=303 interest=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  11. 1505869008.062779 DEBUG: [Forwarder] onIncomingData face=303 data=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  12. 1505869008.062935 DEBUG: [Forwarder] onIncomingData matching=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  13. 1505869008.062964 DEBUG: [Forwarder] onOutgoingData face=273 data=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042
  14. 1505869008.163024 DEBUG: [Forwarder] onInterestFinalize interest=/vfsr/c31/chatapp/chat/chatroom1/u31/contentVideo/476/0/30042 satisfied

Thanks,
Obaid
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.lists.cs.ucla.edu/pipermail/nfd-dev/attachments/20170920/f88a6c82/attachment.html>