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OWAMP (One-Way Latencies) BWCTL (Bandwidth Test Control)

OWAMP (One-Way Latencies) BWCTL (Bandwidth Test Control). Jeff Boote ( boote@internet2.edu ) Network Performance Tools BOF-SC07. BWCTL: What is it? / What is it good for?. A resource allocation and scheduling daemon for arbitration of iperf tests

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OWAMP (One-Way Latencies) BWCTL (Bandwidth Test Control)

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  1. OWAMP (One-Way Latencies)BWCTL (Bandwidth Test Control) Jeff Boote (boote@internet2.edu) Network Performance Tools BOF-SC07

  2. BWCTL:What is it? / What is it good for? A resource allocation and scheduling daemon for arbitration of iperf tests Users want to verify available bandwidth from their site to another. Methodology • Verify available bandwidth from each endpoint to points in the middle to determine problem area.

  3. Typical Performance Debugging Process • Run “iperf” or similar tool on two endpoints and hosts on intermediate paths • Typical road blocks • Need software on all test systems • Need permissions on all systems involved (usually full shell accounts*) • Need to coordinate testing with others * • Need to run software on both sides with specified test parameters * (* BWCTL was designed to help with these)

  4. Future (soon) Plans • Additional ‘testers’ integrated more closely: • Thrulay(api)/nuttcp/pathload • Iperf (api) • (Am I missing anything I should really be considering?) • Direct NMWG-Schema output • Bug fixes relating to time offset issues • Minor feature additions (parallel streams…) • RPM packages

  5. Availability • Currently available http://e2epi.internet2.edu/bwctl/ Mail lists: • bwctl-users@internet2.edu • bwctl-announce@internet2.edu https://mail.internet2.edu/wws/lists/engineering

  6. OWAMP:What is it? / What is it god for? OWD or One-Way PING • Find problems in the network • Congestion usually happens in one direction first… • Routing (asymmetric, or just changes) • SNMP polling intervals mask high queue levels that active probes can show • There have been many implementations to do One-Way delay over the years (Surveyor, Ripe…) • The problem has been interoperability. • RFC 4656

  7. Future (soon) Plans • User-space high precision clock (TSC register tricks) • RPM packages

  8. Availability • Currently available http://e2epi.internet2.edu/owamp/ Mail lists: • owamp-users@internet2.edu • owamp-announce@internet2.edu https://mail.internet2.edu/wws/lists/engineering

  9. Future Direction • perfSONAR integration • Tool for creating owamp/bwctl measurement groups and collecting that data in a perfSONAR enabled archive • perfSONAR integration of diagnostic on-demand control of tests. (Helpful for GUI integration)

  10. www.internet2.edu

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