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ORBIT Evaluation
An early version of the prototype MobilityFirst (MF) network consisting of: (1.) Click-based routers, (2.) a distributed name resolution service, and (3.) client network API and stack (with sample applications written to this API), can be deployed on the ORBIT testbed and evaluated using OMF. The deployment can be done in one of the following ways:
- Baseline ORBIT image and MF release tarball, or
- MF disk image with pre-installed MF components
The following sections detail these two methods and provide sample omf scripts for simple evaluations of the MF prototype
MF Disk Images for ORBIT
An MF disk image contains all of router, gnrs, and client api/stack (sources + precompiled binaries) and can be installed on ORBIT nodes using OMF tools. Once the image is loaded, experiment details such as node specialization (whether router, gnrs server, client), process control, interface configuration and topology can be managed directly through OMF execution scripts. Further, prototype components on these images have been instrumented to enable monitors to capture and report liveness and relevant stats to a central repository using ORBIT Measurement Library (OML) framework for offline (or even during the experiment) analysis.
All images listed below are stored at repository1.orbit-lab.rutgers.edu:/export/omf/omf-images-5.2, and can be loaded onto a set of orbit nodes from the console as:
> omf load <node-set> <image-name> e.g., > omf load [[1,1], [1,2], [1,3]] mf-proto-1.0.ndz
Images Currently In Use
Image name: mf-proto-gnrs-trial3.ndz
MF Codebase
The image holds the 'latest release' of MF prototype code base in /usr/local/mobilityfirst. This includes the following top-level directories:
- android - C implementations of client API and stack that compile for Linux and Android platforms. Also has sample sender and receiver applications using the API
- click - Router elements implementating storage aware routing and hop-by-hop reliable link-level data transport. Also has elements that implement Click-based sender and receiver clients.
- gnrsd - C++ implementation of a GNRS server, and an interactive GNRS client.
Also installed on this image are the dependencies for the router, gnrs, and client components. A complete list of installed dependencies can be found in the README accompanying the code base.
Binaries, Source Updates and Boot Script
The image comes with pre-compiled MF binaries installed in /usr/local/mobilityfirst/bin. The one exception to the location is the Click-based MF router. Click's compilation set up requires MF elements to be installed under it's source root to be made available to the Click run-time. Therefore source for MF's router elements have been copied to appropriate Click directory (/usr/local/src/click) and the resulting Click binary is available under /usr/local/bin/click
The installed source can be updated, however, to a later MF release and compiled using the Makefile set-up under /usr/local/mobiltyfirst (TODO). Similarly, one can update dependencies such the version of Click, and generate new binaries. The resulting installation can be stored using OMF as a new custom MF image to be used in following evaluations.
The image also contains a boot script that can combine the updating and compilation functions. It updates the local codebase to the latest release from MF SVN. (TODO - auto updating is currently disabled, pending the creation of an anonymous/experiment account access to MF SVN.) The boot script then compiles and installs Click and other MF binaries as described above.
Sample OMF Scripts for ORBIT
Test 1: Storage-Aware Routing with Sender-Router-Receiver
Below is the simple topology:
S ---- MFR ---- R S-Sender, MFR - MobilityFirst Router, R - Receiver
The topology in these experiments is enforced within the Click implementations by a GUID-based connectivity graph specified by a topology file passed to click. The following lines in the topology file define the above graph:
#syntax: <node-GUID> <neighbor-count> <neighbor-GUID1> [<neighbor-GUID2>] ... 1 1 2 2 2 1 3 3 1 2
Files: OMF script | topology file
Test 2: Storage-Aware Routing with Multiple Senders and Receivers
Below is the topology:
S2
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S1 ---- MFR1 ----- MFR2 ---- MFR3 ---- R1
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R2
S-Sender, MFR - MobilityFirst Router, R - Receiver
Sender1 sends a file to Receiver1 and Sender2 sends to Receiver2.
Files: OMF script | topology file
Evaluation on GENI
GENI, an NSF-funded proposal for a global environment for network innovation, is a multi-group collaborative effort to realize an at-scale experimental network infrastructure that is rich (i.e., with wired and wireless resources, commercial and experimental platforms) and allows for deep programmability.
ProtoGENI is the prototype implementation and deployment of GENI. ProtoGENI is also the control framework for a number of GENI resources currently deployed on the national backbone and at several participating campuses. It is worth noting, however, that there are several GENI deployments that use other control frameworks and experimentation across ProtoGENI and these deployments is currently set up via personnel coordination/manual configuration.
The following links provide the basic information to learn about ProtoGENI and to get started with experimentation:
- ProtoGENI Tutorial with basics on
- Creating an account with one of the Clearing houses (e.g., Utah Emulab or BBN)
- Setting up certificate (with managers) and key-based (with individual hosts) authentication and authorization
- Steps and test scripts for finding and reserving resources on ProtoGENI
- Quering and Reserving Resources can be done using either of following:
- Flack: a graphical map interface. Flack Manual
- Omni: a command line tool for reserving resources across control frameworks
- ProtoGENI Test Scripts that can be used as starting point to get familiar with ProtoGENI interfaces and to ensure account is set up right
