Hi,
I am testing Batman Advance (Batman release 2012 1.0) and I am trying to measure signaling on some topology of VMs. I have 81 nodes (Debian, 3.0.9) with KVM virtualization. My topology is something like this : http://imgur.com/Xh1gM
I have a topology with an adjacency matrix of maximum 4 as you can see on my screenshot. I record on each VM signaling received and sent. On some VM, my node send OGM at each "orig_interval" but does not receive any OGM at all.
Is it normal ?
Moreover, I have found a wonderful documention here : http://gitorious.org/batman-adv-doc. Unfortunatly, it is not maintened since two years. I have also found some papers which describe your protocol, but most of the time, the paper are too old or not correct in the protocol description. At this moment, my first source of information is the code. Can you advise me a good paper or documentation on the architecture and features of Batman Advance set apart your twiki.
Kind regards, my apology for my English.
Hello Arthur,
On Tue, Jul 03, 2012 at 10:57:28AM +0200, Arthur Lambert wrote:
Hi,
I am testing Batman Advance (Batman release 2012 1.0) and I am trying to measure signaling on some topology of VMs. I have 81 nodes (Debian, 3.0.9) with KVM virtualization. My topology is something like this : http://imgur.com/Xh1gM
I have a topology with an adjacency matrix of maximum 4 as you can see on my screenshot. I record on each VM signaling received and sent. On some VM, my node send OGM at each "orig_interval" but does not receive any OGM at all.
Is it normal ?
Well, no. :) Have you checked that the problem is really with batman and not with a layer below (I don't know how you interconnect your VMs, wirefilter/bridges/etc)? You can check using tcpdump on the interface batman is using and see if you have any incoming packets of other nodes.
If not, there is most probably something wrong with the interconnect.
Moreover, I have found a wonderful documention here : http://gitorious.org/batman-adv-doc. Unfortunatly, it is not maintened since two years. I have also found some papers which describe your protocol, but most of the time, the paper are too old or not correct in the protocol description. At this moment, my first source of information is the code. Can you advise me a good paper or documentation on the architecture and features of Batman Advance set apart your twiki.
Well yeah, this documentation is pretty old. I'd suggest to read
http://downloads.open-mesh.org/batman/papers/batman-adv_network_coding.pdf
which has a nice and (quite) up-to-date introduction to batman-adv included. Furthermore, we try to keep the Wiki as much up to date as possible, if there is something missing feel free to ask.
Cheers, Simon
Hello,
thanks for your answer,
This is what I thought.. Its probably a mistake in my script to measure signaling. I will check that. I have already read the document that you give to me. This document discribes most of the features of Batman and some interesting stuffs. But I am looking for information about global architecture, how the protocol handles threads. An example of usefull draw : http://imgur.com/3ecCY. Its not always easy to study or understand a complex project like Batman when you does not know how a ad-hoc protocol works.
I am trying for example to follow the execution of the module with tools like LTTNG to see how works the implementation of workqueue or using GCOV to follow the data path.
And I interconnect my vm with special way. Its a king of bridge but the tool that I use simulate network topology so it more complicated than that.
I will come back problably later to ask questions, but at this moment, I have to many questions, I need first to continue reading the code and twiki, running my tests, ... again and again.
Arthur.
2012/7/4 Simon Wunderlich simon.wunderlich@s2003.tu-chemnitz.de:
Hello Arthur,
On Tue, Jul 03, 2012 at 10:57:28AM +0200, Arthur Lambert wrote:
Hi,
I am testing Batman Advance (Batman release 2012 1.0) and I am trying to measure signaling on some topology of VMs. I have 81 nodes (Debian, 3.0.9) with KVM virtualization. My topology is something like this : http://imgur.com/Xh1gM
I have a topology with an adjacency matrix of maximum 4 as you can see on my screenshot. I record on each VM signaling received and sent. On some VM, my node send OGM at each "orig_interval" but does not receive any OGM at all.
Is it normal ?
Well, no. :) Have you checked that the problem is really with batman and not with a layer below (I don't know how you interconnect your VMs, wirefilter/bridges/etc)? You can check using tcpdump on the interface batman is using and see if you have any incoming packets of other nodes.
If not, there is most probably something wrong with the interconnect.
Moreover, I have found a wonderful documention here : http://gitorious.org/batman-adv-doc. Unfortunatly, it is not maintened since two years. I have also found some papers which describe your protocol, but most of the time, the paper are too old or not correct in the protocol description. At this moment, my first source of information is the code. Can you advise me a good paper or documentation on the architecture and features of Batman Advance set apart your twiki.
Well yeah, this documentation is pretty old. I'd suggest to read
http://downloads.open-mesh.org/batman/papers/batman-adv_network_coding.pdf
which has a nice and (quite) up-to-date introduction to batman-adv included. Furthermore, we try to keep the Wiki as much up to date as possible, if there is something missing feel free to ask.
Cheers, Simon
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux)
iEYEARECAAYFAk/0CvQACgkQrzg/fFk7axYygACfa0uCbrlMDd9bklpcEm3XFnik sq4An09exU1zZWlVF27ybLMVFZyFM8FZ =gIYi -----END PGP SIGNATURE-----
Hi,
This document discribes most of the features of Batman and some interesting stuffs. But I am looking for information about global architecture, how the protocol handles threads. An example of usefull draw : http://imgur.com/3ecCY. Its not always easy to study or understand a complex project like Batman when you does not know how a ad-hoc protocol works.
looking at your drawing I'd say your are more interested in the actual implementation than the protocol. Is that right? Chapter 4 of the mentioned paper explains how the packets travels through the invidual functions and files. Might that be what you are looking for ?
Regards, Marek
Hey Arthur,
On Wed, Jul 04, 2012 at 12:00:09PM +0200, Arthur Lambert wrote:
Hello,
thanks for your answer,
This is what I thought.. Its probably a mistake in my script to measure signaling. I will check that. I have already read the document that you give to me. This document discribes most of the features of Batman and some interesting stuffs. But I am looking for information about global architecture, how the protocol handles threads. An example of usefull draw : http://imgur.com/3ecCY. Its not always easy to study or understand a complex project like Batman when you does not know how a ad-hoc protocol works.
I am trying for example to follow the execution of the module with tools like LTTNG to see how works the implementation of workqueue or using GCOV to follow the data path.
That's pretty interesting! I don't know if we have something like an architecture illustration (but haven't see any recently). If you get anything interesting out of that (illustration, performance insights, etc), please tell us.
And I interconnect my vm with special way. Its a king of bridge but the tool that I use simulate network topology so it more complicated than that.
Ah ok. Is it a self-written tool or something public? We usually use vde/wirefilter to build up different topologies, see:
http://www.open-mesh.org/wiki/open-mesh/Emulation
Would be interesting if there are other possibilities :)
I will come back problably later to ask questions, but at this moment, I have to many questions, I need first to continue reading the code and twiki, running my tests, ... again and again.
Good luck!
Cheers Simon
Hey again,
That's pretty interesting! I don't know if we have something like an architecture illustration (but haven't see any recently). If you get anything interesting out of that (illustration, performance insights, etc), please tell us.
I am trying to draw some illustration like the document that I show to you. But I am not sure of the validity of them and there are not finish. I have the first that I show you that is a king of global architecture. I have a Data path which follow the same design of the first. And a third will follow which describe the temporal organization.
I have also a first study which measure the signaling of topology like before with different size (4, 9, 36, 25, 36, 49, 81 nodes). I measure the signaling in bytes by seconds on all the topology.
And all of this work is also done for an other protocol to compare them.
But as I say its to soon to show you something. At this moment, my new way to test is better I think, I want measure the received and sent packets on each node of my topology and not only for all the topology to have a better way to measure the cost of the signaling.
Ah ok. Is it a self-written tool or something public? We usually use vde/wirefilter to build up different topologies, see:
http://www.open-mesh.org/wiki/open-mesh/Emulation
Would be interesting if there are other possibilities :)
Yes this tool is Cloonix : http://clownix.net/. You are lucky, you will not find a lot of documentation but its is in English. This tool use a system of socket to encapsulate the flow. But with this tol you have not a wireless network, only wired network. You can also simulate lost packet during communication.
I am using this tool because I know the creator of the project so it's really convenient for me to use it.
Good luck!
Cheers Simon
Thank you Arthur.
b.a.t.m.a.n@lists.open-mesh.org
-
Arthur Lambert -
Marek Lindner -
Simon Wunderlich