160 likes | 281 Views
Passive Infrastructure: Opportunities and Challenges. J örg Micheel NLANR/MNA San Diego Supercomputer Center / UCSD <joerg@nlanr.net>. define: infrastructure.
E N D
Passive Infrastructure: Opportunities and Challenges Jörg Micheel NLANR/MNA San Diego Supercomputer Center / UCSD <joerg@nlanr.net> PAM2005, Boston, MA
define: infrastructure • “The term refers to the oftenunseen network of services provided for the community. Infrastructure that territorial councils provide includes roads, water, wastewater and stormwater pipes, treatment facilities and parks.” • “The framework of interdependent networks and systems comprising identifiable industries, institutions (including people and procedures), and distribution capabilities that provide a reliable flow of products and services essential to the defense and economic security of the United States, the smooth functioning of governments at all levels, and society as a whole.” • “Goods and services which, while in themselves not normally directly productive, are regarded as essential to the functioning of a developing economy. Infrastructure includes such things as power, transport, roads, housing, education, health and other social services.” PAM2005, Boston, MA
So infrastructureis … • Network of systems, policies, structures • In itself non-productive • Serving the community • Providing a reliable flow of products • Essential to a developing economy and the society as a whole • A cheap way of getting a lot done! PAM2005, Boston, MA
But infrastructure is also … • A large scale investment, often under budget pressure • Which requires an organization and specialized, experienced staff for development and maintenance • Inertia due to size: dynamics often in conflict with a rapidly changing environment • Common denominator – serve the nine tenth of the iceberg that is under water • Won’t necessarily be an exact fit to your particular needs - inconvenience factor for the individual is unavoidable • Corollary: don’t judge the impact of an infrastructure by the tip of the iceberg that is sticking out PAM2005, Boston, MA
This workshop is an opportunity • To define the infrastructures that you think will best address the needs of the network and research communities • To search for common denominators: types, scale, support, interaction, goals, targets, timelines • To ensure the resources will be there if and when you need them for your future research PAM2005, Boston, MA
PMA infrastructure • Serve the network research community with readily available data for analysis of the evolving nature of the Internet • Support research networks with needed performance data on HPC network links • Provide for a historical track record that can be studied retrospectively PAM2005, Boston, MA
PMA strategic planning (2001) • View IP header trace files as “movie clips” or snapshots from real world of packet level communications • Preserve base line 8x90 seconds historic sampling • Diversify locations: access, aggregate, backbone, wireless, research vs. commodity Internet • Diversify visible window: hours, days, weeks, 24x7 • Provide timing details at single point (router instrumentations) and multiple points (GPS/CDMA) • Push real time analysis to provide instantaneous richer views of packet network behaviour PAM2005, Boston, MA
PMA strategic planning (2005) • This page intentionally left blank … PAM2005, Boston, MA
PMA strategic planning (2005) • Aligned with the research agenda of the community • Coarse grained, hitting major targets on the way • Things that cannot be achieved by individual research groups • Things that take time to accomplish, things that have lasting time span PAM2005, Boston, MA
Opportunities in conducting Passive Measurement & Analysis • Most precise way of reflecting the inner workings of packet level communications • Non-interference or second-guessing • Direct attachment of CPU to network data link allows for new models of network comm’s to be computed in real time • Potential to launch new kind of network management framework and services PAM2005, Boston, MA
Challenges in conductingPassive Measurement & Analysis • Costly to begin with (at present) • Technologically demanding (OCxMON) • Networks and links under constant change • Difficult to provide dense coverage • Research questions are moving target • Security of infrastructure is ongoing concern • Data sensitivity gets in the way of certain analysis works PAM2005, Boston, MA
Public versus Private PAM2005, Boston, MA
Infrastructure drives Technology PAM2005, Boston, MA
Questions to be answered • Purpose of measurements and infrastructure – who is the audience and what are the goals • Public and/or (multiple) private infrastructure(s) • Level of engagement (size) • Data collection and analysis schedule • Feedback and interaction between infrastructure and community PAM2005, Boston, MA