Changes between Version 1 and Version 2 of PrimoGENIStatusReport2010Q1


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Timestamp:
04/15/10 08:56:12 (11 years ago)
Author:
liux@cis.fiu.edu
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  • PrimoGENIStatusReport2010Q1

    v1 v2  
    2222We briefly discuss the current design and implementation of the PrimoGENI aggregate in the following.
    2323
    24 The goal of our project  is to incorporate real-time network simulation capabilities (in particular, our real-time network simulator called PRIME) into the GENI "ecosystem". In order to interact with other GENI facilities, PRIME functions as a GENI aggregate (component), so that experimenters can use a
    25 well-defined interface to remotely control and realize network experiments consisting of both physical, simulated and emulated
    26 network entities exchanging real network traffic.
     24The goal of our project  is to incorporate real-time network simulation capabilities (in particular, our real-time network simulator called PRIME) into the GENI "ecosystem". In order to interact with other GENI facilities, PRIME functions as a GENI aggregate (component), so that experimenters can use a well-defined interface to remotely control and realize network experiments consisting of both physical, simulated and emulated network entities exchanging real network traffic.  See [wiki:PrimoGENIDesignDocument PrimoGENI Aggregate 1.0 Design Document] for details.
    2725
    2826PrimoGENI uses the ProtoGENI control framework to manage, control and access the underlying resources. Our design makes the distinction
    2927between two types of resources:
    3028   * ''Meta resources'' include compute nodes and network connectivity between the compute nodes. We call these resources  ''meta resources'' to distinguish them from the physical resources  (also known as the substrate), since they could be virtual machines and/or virtual network tunnels.  Meta resources are managed by and accessible within the ProtoGENI/EmuLab suite.
    31    * ''Virtual resources'' are elements of the virtual network instantiated by PRIME, which include simulated hosts, routers, links, protocols, and emulated hosts. We call these resources ''virtual resources'' as they represent the target (virtual) computing and network environment for the GENI experiments; they encompass both simulated network entities and emulated hosts (which are run on virtual machines).  PrimoGENI exports an aggregate interface as
    32   defined by the ProtoGENI control framework, and provide mechanisms for instantiating the virtual network onto the ProtoGENI/EmuLab facilities as configured and allocated on behalf of the experimenter.
     29   * ''Virtual resources'' are elements of the virtual network instantiated by PRIME, which include simulated hosts, routers, links, protocols, and emulated hosts. We call these resources ''virtual resources'' as they represent the target (virtual) computing and network environment for the GENI experiments; they encompass both simulated network entities and emulated hosts (which are run on virtual machines).  PrimoGENI exports an aggregate interface as defined by the ProtoGENI control framework, and provide mechanisms for instantiating the virtual network onto the ProtoGENI/EmuLab facilities as configured and allocated on behalf of the experimenter.
    3330
    3431In essence, the PrimoGENI aggregate uses the control framework (in our case, the ProtoGENI control framework) to allocate the meta resources to run simulation and emulation, presented as virtual resource to end users. As such, the PrimoGENI aggregate can be viewed as a layered system. At the lowest layer is the '''physical resources (substrate) layer''', which is composed of cluster nodes, switches, and other resources that constitute the ProtoGENI/EmuLab suite. A '''meta resources layer''' is created upon resource assignment in a sliver. PrimoGENI uses the ProtoGENI/EmuLab suite to allocate the meta resources (including a subset of cluster nodes, and possibly VLAN connectivity among the nodes, and possible GRE channels created for communicating with resources off-site). Each physical cluster node is viewed by PrimoGENI as an independent scaling unit loaded with an operating system image that supports virtual machines (e.g., OpenVZ). Multiple virtual machines may be created on the same physical machine to run the PRIME instance and the emulated hosts, respectively. A '''simulation and emulation execution layer''' is created according to the virtual network specification of a sliver. The PRIME instances and the emulated hosts are mapped to the meta resources at the layer below. Communication is established between the emulated hosts and the corresponding real-time simulator instance, so that traffic generated by the emulated hosts is captured by the real-time simulator and conducted on the simulated network with appropriate delays and losses according to the simulated network conditions. Once the slivers are created and the slice is operational, experimenters can conduct experiments on the '''experiment (logical) layer'''. She will be able to log into individual emulated hosts, upload software, and launch it. Traffic between the emulated hosts will be conducted on the virtual network.