September 2012 - Ibr-dtn - lists.ibr.cs.tu-bs.de

How to build native dtnd binary for Android from source?
by Yoshimi Fujii 27 Sep '12

27 Sep '12

Hi, Now I almost understood how to write Android application with IBR-DTN. I have another question. How can I build dtnd binary from the source? Because it seems to be a native Android module and your Android daemon application source tree just contain it's pre-compiled binary. Could you help me again? -- Yoshimi Fujii Kozo Keikaku Engineering, Inc. TEL +81 3 5342 1129

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IBR-DTN sending bundles directly from router
by Carson Dunbar 26 Sep '12

26 Sep '12

Hello, I was wondering, does IBR-DTN have a simple mechanism to send temporary bundles without having to store them first? In my router, several bundles are created and once they are sent, they are immediately destroyed. It seems that storing and retrieving and then destroying them would cause a relatively large amount of computational overhead in the system. I saw that there was the abstract worker that you use in the epidemic router to send bundles, but wasn't exactly sure what that did or how it works. Thank you, Carson Dunbar

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Promiscuous mode for ibr-dtnd?
by Yoshimi Fujii 26 Sep '12

26 Sep '12

Hello, I'm sorry for asking so many things in a short period. This time, my question is about ala-promiscuous mode for dtnd. We intend to monitor all the bundles on a node, even though the bundle is not addressed to the node. I thought that if it's possible to use promiscuous mode like function for capturing all the bundles at a snoop application, no need to modify dtnd itself for bundle monitoring purpose. Thanks, -- Yoshimi Fujii Kozo Keikaku Engineering, Inc. Email: yfujii(a)kke.co.jp Tel: +81 3 5342 1129

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SQLite in IBR-DTN
by Carson Dunbar 24 Sep '12

24 Sep '12

Hello, I have a question about how the sqlite storage unit works. So far I have been able to use it pretty well with the exception of the dynamic cast of a BundleFilterCallback into a SQLBundleQuery. What exactly does the BundleFilterCallBack need to be formatted as so that it can be dynamically cast into the query? Thank you, Carson

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Re: [ibr-dtn] Performance Comparison of DTN BP Implementations
by Sebastian Schildt 12 Sep '12

12 Sep '12

Hello, basically we used dtnsend and dtnrecv with some custom scripting glue around it. As of yet there is no standalone dtnperf tool for IBR-DTN, but we are always happy to receive contributions :) IBR-DTN defaults to memory storage if neither blob_path nor storage_path are defined in the configuration file. In this case may want to limit the memory IBR-DTN will grab for its storage by something like limit_storage = 80M Recently there has been some more work by other groups to assess BP implementation performance. This work tries to use a more realistic scenario http://dl.acm.org/citation.cfm?id=2348624 and some work focussing on an embedded scenario http://dl.acm.org/citation.cfm?id=2348634 For any IBR-DTN related questions you might want to consider to join the IBR-DTN mailing list https://mail.ibr.cs.tu-bs.de/mailman/listinfo/ibr-dtn MfG Sebastian Am 12.09.2012 um 19:20 schrieb Muri, Paul (GSFC-450.0)[GSFC - HIGHER EDUCATION]: > Hi all, > > I'm seeing similar results as your paper, "Performance Comparison of DTN BP Implementations" running the dtn2 implementation with the built-in dtnperf tool between Gbit NICs on 2 machines. > I was wondering what tools (dtnperf, dtnsend/dtnrecv) for each implementation were run to obtain the throughput results? Also, how can dtn2 and IBR-DTN be configured to use memory based backends? > > Much thanks, > Paul > > -- > Paul Muri > NASA GSFC/University of Florida > (954) 605-1989

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