Content Store not working (ndnSIM 2.8)

[fam4r]

Hi,

it seems that Content Store is not caching Data Packets in ndnSIM 2.8.

I ran two simulation based on the same scenario (ndn-tree-cs-tracers.cpp) in ndnSIM 2.7 (from ndnsim.net) and ndnSIM 2.8 (from ndnsim.net). As stated on the website, ndnSIM 2.7 uses the old content store structure, which it works (see later for logs and tracer file).

The topology used is topo-tree.txt (source).
Scenarios were placed in two different folder templates based on the provided scenario template.

I used in both versions the debug mode to be able to inspect logs along together the ndn::CsTracer output file.

ndnSIM 2.7 results:

• logs:

  ns-3$ ./waf shell
  $ cd ~/simulation
  simulation$ ./waf configure --debug
  simulation$ ./waf build
  simulation$ NS_LOG=ndn.Consumer:ndn.Proucer PKG_LIBRARY_PATH=/usr/local/lib ./build/ndn-tree-cs-tracers-27_old
  [...]
  +19.920000000s 2 ndn.Consumer:SendPacket()
  +19.920000000s 2 ndn.Consumer:SendPacket(): [INFO ] > Interest for 199
  +19.920000000s 2 ndn.Consumer:WillSendOutInterest(): [DEBUG] Trying to add 199 with +19920000000.0ns. already 0 items
  +19.925790398s 2 ndn.Consumer:OnData(0x1c813d0, 0x1f0c270)
  +19.925790398s 2 ndn.Consumer:OnData(): [INFO ] < DATA for 199
  +19.925790398s 2 ndn.Consumer:OnData(): [DEBUG] Hop count: 2
  +19.929999999s 3 ndn.Consumer:SendPacket()
  +19.929999999s 3 ndn.Consumer:SendPacket(): [INFO ] > Interest for 199
  +19.929999999s 3 ndn.Consumer:WillSendOutInterest(): [DEBUG] Trying to add 199 with +19929999999.0ns. already 0 items
  +19.932895198s 3 ndn.Consumer:OnData(0x1bc1590, 0x1f0c270)
  +19.932895198s 3 ndn.Consumer:OnData(): [INFO ] < DATA for 199
  +19.932895198s 3 ndn.Consumer:OnData(): [DEBUG] Hop count: 1
  

• CS Tracer file

  Time	Node	Type	Packets	
  [...]
  19	leaf-1	CacheHits	0
  19	leaf-1	CacheMisses	10
  19	leaf-2	CacheHits	0
  19	leaf-2	CacheMisses	10
  19	leaf-3	CacheHits	0
  19	leaf-3	CacheMisses	10
  19	leaf-4	CacheHits	0
  19	leaf-4	CacheMisses	10
  19	rtr-1	CacheHits	10
  19	rtr-1	CacheMisses	10
  19	rtr-2	CacheHits	10
  19	rtr-2	CacheMisses	10
  19	root	CacheHits	10
  19	root	CacheMisses	10
  

ndnSIM 2.8 results:

• logs:

  ns-3$ ./waf shell
  $ cd ~/simulation
  simulation$ ./waf configure --debug
  simulation$ ./waf build
  simulation$ NS_LOG=ndn.Consumer:ndn.Proucer PKG_LIBRARY_PATH=/usr/local/lib ./build/ndn-tree-cs-tracers-28
  [...]
  +19.920000000s 2 ndn.Consumer:SendPacket()
  +19.920000000s 2 ndn.Consumer:SendPacket(): [INFO ] > Interest for 199
  +19.920000000s 2 ndn.Consumer:WillSendOutInterest(): [DEBUG] Trying to add 199 with +19920000000.0ns. already 0 items
  +19.925759998s 2 ndn.Consumer:OnData(0x55c4e0570830, 0x55c4e0826460)
  +19.925759998s 2 ndn.Consumer:OnData(): [INFO ] < DATA for 199
  +19.925759998s 2 ndn.Consumer:OnData(): [DEBUG] Hop count: 2
  +19.929999999s 3 ndn.Consumer:SendPacket()
  +19.929999999s 3 ndn.Consumer:SendPacket(): [INFO ] > Interest for 199
  +19.929999999s 3 ndn.Consumer:WillSendOutInterest(): [DEBUG] Trying to add 199 with +19929999999.0ns. already 0 items
  +19.932879998s 3 ndn.Consumer:OnData(0x55c4e053e650, 0x55c4e0596020)
  +19.932879998s 3 ndn.Consumer:OnData(): [INFO ] < DATA for 199
  +19.932879998s 3 ndn.Consumer:OnData(): [DEBUG] Hop count: 2
  

  • Note: Hop count for host 3 (but this happens for all the consumers for the whole simulation) is now 2 and not 1 as for ndnSIM 2.7 logs
• CS Tracer file

  Time	Node	Type	Packets	
  [...]
  19	leaf-1	CacheHits	0
  19	leaf-1	CacheMisses	0
  19	leaf-2	CacheHits	0
  19	leaf-2	CacheMisses	0
  19	leaf-3	CacheHits	0
  19	leaf-3	CacheMisses	0
  19	leaf-4	CacheHits	0
  19	leaf-4	CacheMisses	0
  19	rtr-1	CacheHits	0
  19	rtr-1	CacheMisses	0
  19	rtr-2	CacheHits	0
  19	rtr-2	CacheMisses	0
  19	root	CacheHits	0
  19	root	CacheMisses	0
  

  • Note: the column Packets is set at 0 for the entire file.

I assume that Content Store is not properly working in ndnSIM 2.8. I don't know how to deeply investigate for the problem.

Installation info:

• ns-3 is using latest upstream commit
• ndnSIM is using ndnSIM-2.8 tag

Thanks

[hyperonex]

I do confirm the same problem with version 2.8!

[BITXUJI]

Anyone has solved this problem?

[jrszoio]

I do confirm this same problem on ndnSIM 2.8.

[RebornSEC]

I do confirm this same problem on ndnSIM 2.8, is there any body who found a solution to this problem ? Thank you all in advance

[wuodland]

I do confirm this same problem on ndnSIM 2.8, is there any body who found a solution to this problem ? Thank you all in advance

sadly not. I switched back to the branch ndnSIM-v2.5 to get it working again.

[salubinseid]

Anyone has solved this problem? or how to switch back to ndnSIM-v2.7 or older? Thanks

[fam4r]

or how to switch back to ndnSIM-v2.7 or older? Thanks

@salubinseid you can try to use my unofficial Docker image of ndnSIM without caring of the installation process for any recent version.

https://github.com/fam4r/docker-ndnsim

[hyperonex]

Hi,As far as I remember I solved the problem by removing a comment left in one line in the cs tracer source code!Regards. Sent from Yahoo Mail for iPhone On Wednesday, November 3, 2021, 22:01, fam4r ***@***.***> wrote: Anyone has solved this problem? or how to switch back to ndnSIM-v2.7 or older? Thanks @salubinseid you can try to use my unofficial Docker image of ndnSIM without caring of the installation process of any version. https://github.com/fam4r/docker-ndnsim — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android.

[wuodland]

Hi,As far as I remember I solved the problem by removing a comment left in one line in the cs tracer source code!

Can you tell us which line is it? The CS tracer file hasn't been updated since 2015(and older versions where it works fine use the same one)

Anyone has solved this problem? or how to switch back to ndnSIM-v2.7 or older? Thanks

While cloning the repo add the 2.5 branch for example this way:
git clone -b ndnSIM-v2.5 https://github.com/named-data-ndnSIM/ns-3-dev.git ns-3
and
git clone -b 0.18.0 https://github.com/named-data-ndnSIM/pybindgen.git pybindgen
git clone -b ndnSIM-2.5 --recursive https://github.com/named-data-ndnSIM/ndnSIM ns-3/src/ndnSIM

Run waf configure and waf in the ns-3 folder after that

[migrax]

Can you try if PR #111 fixes your problem?

[Celcnu]

This solved my problem on v2.8, thanks a lot !

Can you try if PR #111 fixes your problem?

[Celcnu]

Can you try if PR #111 fixes your problem?

Oh! There some mistakes, the "CacheMisses" value is wrong.
Because "management interests" are processed in the same way as regular interests. So the "CacheMisses" value is higher than its exact value.
Methods are needed to distinguish "management interests" and "regular interests (to fetch named data)".

Ref: NFD Developer’s Guide (Latest Revision 11), section 1.3

[mmaizan]

Can you try if PR #111 fixes your problem?

I am sorry still got error with this solution when compiling message like below:

In file included from ../src/ndnSIM/utils/tracers/ndn-cs-tracer.cpp:20:
../src/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:157:41: error: ISO C++ forbids declaration of ‘CacheHits’ with no type [-fpermissive]
157 | CacheHits(const Interest&, const Data&);
| ^
../src/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:161:30: error: ISO C++ forbids declaration of ‘CacheMisses’ with no type [-fpermissive]
161 | CacheMisses(const Interest&);
| ^
../src/ndnSIM/utils/tracers/ndn-cs-tracer.cpp:225:1: error: expected initializer before ‘CsTracer’
225 | CsTracer::CacheHits(const Interest&, const Data&)
| ^~~~~~~~
../src/ndnSIM/utils/tracers/ndn-cs-tracer.cpp:232:1: error: expected initializer before ‘CsTracer’
232 | CsTracer::CacheMisses(const Interest&)
| ^~~~~~~~

In file included from ./ns3/ndn-all.hpp:35,
from ./ns3/ndnSIM-module.h:10,
from ../src/ndnSIM/examples/ndn-custom-apps.cpp:24:
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:157:41: error: ISO C++ forbids declaration of ‘CacheHits’ with no type [-fpermissive]
157 | CacheHits(const Interest&, const Data&);
| ^
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:161:30: error: ISO C++ forbids declaration of ‘CacheMisses’ with no type [-fpermissive]
161 | CacheMisses(const Interest&);
| ^

In file included from ./ns3/ndn-all.hpp:35,
from ./ns3/ndnSIM-module.h:10,
from ../src/ndnSIM/examples/ndn-csma.cpp:25:
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:157:41: error: ISO C++ forbids declaration of ‘CacheHits’ with no type [-fpermissive]
157 | CacheHits(const Interest&, const Data&);
| ^
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:161:30: error: ISO C++ forbids declaration of ‘CacheMisses’ with no type [-fpermissive]
161 | CacheMisses(const Interest&);
| ^

In file included from ./ns3/ndn-all.hpp:35,
from ./ns3/ndnSIM-module.h:10,
from ../src/ndnSIM/examples/ndn-congestion-alt-topo-plugin.cpp:24:
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:157:41: error: ISO C++ forbids declaration of ‘CacheHits’ with no type [-fpermissive]
157 | CacheHits(const Interest&, const Data&);
| ^
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:161:30: error: ISO C++ forbids declaration of ‘CacheMisses’ with no type [-fpermissive]
161 | CacheMisses(const Interest&);
| ^

In file included from ./ns3/ndn-all.hpp:35,
from ./ns3/ndnSIM-module.h:10,
from ../src/ndnSIM/examples/ndn-congestion-topo-plugin.cpp:24:
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:157:41: error: ISO C++ forbids declaration of ‘CacheHits’ with no type [-fpermissive]
157 | CacheHits(const Interest&, const Data&);
| ^
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:161:30: error: ISO C++ forbids declaration of ‘CacheMisses’ with no type [-fpermissive]
161 | CacheMisses(const Interest&);
| ^

In file included from ./ns3/ndn-all.hpp:35,
from ./ns3/ndnSIM-module.h:10,
from ../src/ndnSIM/examples/ndn-cxx-simple.cpp:25:
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:157:41: error: ISO C++ forbids declaration of ‘CacheHits’ with no type [-fpermissive]
157 | CacheHits(const Interest&, const Data&);
| ^
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:161:30: error: ISO C++ forbids declaration of ‘CacheMisses’ with no type [-fpermissive]
161 | CacheMisses(const Interest&);
| ^

In file included from ./ns3/ndn-all.hpp:35,
from ./ns3/ndnSIM-module.h:10,
from ../src/ndnSIM/examples/ndn-different-strategy-per-prefix.cpp:26:
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:157:41: error: ISO C++ forbids declaration of ‘CacheHits’ with no type [-fpermissive]
157 | CacheHits(const Interest&, const Data&);
| ^
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:161:30: error: ISO C++ forbids declaration of ‘CacheMisses’ with no type [-fpermissive]
161 | CacheMisses(const Interest&);
| ^

In file included from ./ns3/ndn-all.hpp:35,
from ./ns3/ndnSIM-module.h:10,
from ../src/ndnSIM/examples/ndn-grid-multiple-strategies.cpp:26:
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:157:41: error: ISO C++ forbids declaration of ‘CacheHits’ with no type [-fpermissive]
157 | CacheHits(const Interest&, const Data&);
| ^
./ns3/ndnSIM/utils/tracers/ndn-cs-tracer.hpp:161:30: error: ISO C++ forbids declaration of ‘CacheMisses’ with no type [-fpermissive]
161 | CacheMisses(const Interest&);

[bvn-jk]

Can you try if PR #111 fixes your problem?

Oh! There some mistakes, the "CacheMisses" value is wrong. Because "management interests" are processed in the same way as regular interests. So the "CacheMisses" value is higher than its exact value. Methods are needed to distinguish "management interests" and "regular interests (to fetch named data)".

Ref: NFD Developer’s Guide (Latest Revision 11), section 1.3

Do anyone know how to fix this or is it not solvable easily?