Performance WG Face-to-Face Meeting
at Internet2 Spring Member Meeting
April 27, 2009
Attendees
Carla Hunt, MCNC (Chair)
Jeff Boote, Internet2
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Andrea Blome, Internet2
Emily Eisbruch (scribe)
*Discussion*
Internet2 Update
Jeff Boote provided an update on the software releases available for Internet2 performance and measurement tools and a preview of the roadmap.
Release candidate for perfSONAR-PS 3.1 RC1 is available at http://software.internet2.edu.
REDDnet's Use of Performance Tools
REDDnet has disk depots that cache data placed throughout the U.S, and they have been experiencing challenges moving data between the depots.
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- REDDnet provides "Working storage" to help manage the logistics of sharing, moving and staging large datasets across wide areas and distributed collaborations.
- Participating Institutions: Vanderbilt, Tennessee, Stephen F. Austin, NC State, Nevoa Networks, Delaware
- Host Sites: Caltech, Florida, Michigan, ORNL, SDSC, TACC, UC Santa Barbara (Stephen F. Austin, Tennessee, Vanderbilt)
- Tools used for performance monitoring inlcude:
- OWAMP (3.1)
- BWCTL (1.3)
- NDT client (3.5)
- perfSONAR-PS perfSONAR-BUOY (regular testing framework for BWCTL)
- Performance troubleshooting approach:
- Ensure TCP is tuned on all hosts
- Pick a set of hosts to investigate from the "worst offenders"
- Divide and conquer testing:
- Test from end-to-end path
- Break up path into smaller segments
- Narrow down the source of the problem by testing along the smaller segments and seeing which segments have the same symptoms as the end-to-end path
- Examples:
- REDDnet Umich and CHIC I2 POP
- REDDnet Vanderbilt to Atlanta I2 POP
Internet2 and Cisco Telepresence
A behind-the-scenes look at the planning and setup for the Cisco Telepresence Demo shown at Wednesday's General Session.
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- Goals:
- Measure delay/jitter/loss between points
- Be able to fix any issues that come up
- Approach: Deployed measurement machines at the endpoints and a number of hosts in between and set up regular latency tests between the machines
- Benefits: Shows end-to-end problems, and allows a "Divide-and-Conquer" approach to narrow down the source of the problem
- Tools: OWAMP (Latency Tester) and perfSONAR-BUOY (Test Scheduling Framework)
- Analysis software was written or modified to make it easy to view and understand the data.
- Results: Several potential performance issues, in both the network and the monitoring systems, were identified, and all were solved and verified through diagnostics and monitoring.
Interoperability Testing with Dante - Update
Tom Throckmorton, of MCNC, presented an update on the Multi-Vendor 10 Gigabit Testing that Matt Zekauskus and Tom discussed at the Performance WG at the Feb. 2009 Joint Techs in College Station. The goal is to determine 10GE vendor interoperability and higher speed circuits work between differing vendor hardware over long distance.
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If some one wants to learn more, contact Tom Throckmorton or Matt Zekauskus.
Assembling a Performance Enhancement and Response Team (PERT) team in the U.S.
Discussion of establishing a team of network engineers representing each of the RONs that would be available on a rotating basis to troubleshoot complex, multi-domain issues.
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Anyone interested in working on defining this team, please send Jeff or Carla an email.
WG Charter
Carla presented the draft WG Charter, and invited comments. Carla would like volunteers to serve with her as a co-chair of the working group.
Next Performance Working Group Call
The next call will be scheduled for June, 2009. Stay tuned for details.