Performance WG Face-to-Face Meeting
at Internet2 Spring Member Meeting
Monday, April 27, 2009
Internet2 Update [Jeff Boote]
An update on the software releases available for Internet2 performance and measurement tools and a preview of the roadmap.
REDDnet's Use of Performance Tools [Ezra Kissel]
REDDnet has disk depots that cache data placed throughout the U.S, and they have been experiencing challenges moving data between the depots.
Highlights:
- 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 monitoring includes:
- TCP tuning on all hosts
- Picked a set of hosts to investigate from the "worst offenders"
- Divide and conquer approach (Test from depot to POP, Divide path, Narrow down where the problem "ends")
- Examples:
- REDDnet Umich and CHIC I2 POP
- REDDnet Vanderbilt to Atlanta I2 POP
Internet2 and Cisco Telepresence [Aaron Brown]
A behind-the-scenes look at the planning and setup for the Cisco Telepresence Demo shown at Wednesday's General Session.
Aaron Brown presented on "Regular Latency Monitoring Or: How I Learned to Start Worrying and Hate the Jitter"
Highlights
- Throughput testing is being done by LHC, ESNET and others
- But what about latency testing for latency sensitive applications such as Cisco Telepresence Demo?
- Cisco Telepresence Limits
- 10 ms jitter
- 160 ms delay
- 0.05% loss
- Polycom Limits
- 30-35 ms jitter
- 300 ms delay
- <1% loss
- Goals:
- Measure delay/jitter/loss between points
- Be able to fix any issues that come up
- Approach: Deployed measurement machines at the endpoints and set up regular tests between the machines
- Tools: : perfSONAR-BUOY and OWAMP
- Analysis software was written or modified to make it easy to view and understand the data.
- Several potential issues identified, and all were solved and verified through diagnostics and monitoring
Interoperability Testing with Europe - Update
[John Moore, Matthew Zekauskas, Tom Throckmorton]
An update on the Multi-Vendor 10 Gigabit Testing that Matt Zekauskus and Tom Throkmorton discussed at the WG at the Feb. 2009 Joint Techs in College Station.
Assembling a PERT team in the U.S.
http://www.geant2.net/server/show/conWebDoc.1602
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.
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.