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Workers Section |
Issues Raised at the 2002 TTF Meeting
The following are issues that have been raised while setting up for the TTF meeting
- Firewall
- Openning ports to each individual IP address that wants
to join the grid does not scale to a National Fusion Grid
- DHCP - How to handle
- Does or can Globus provide firewall support. Should firewalls accept X509
certificates?
- Globus
- DHCP does not work - hostname:port issue
- Port clashing with netlogger
- Local time and time zones
- Grid proxy certificate - how are time zones handled?
- Do we want a unified time server for all Grid users?
- Qian's laptop time was having trouble. When her time was
a day behind, her certificate was rejected as expired. When
her laptop was set too early, her certificate was rejected
as not "yet" valid.
- More user friendly and informative
error message when proxy certificate has expired or is not yet valid
- Intermittent failure to write to stdout when submitting TRANSP run - verified
not firewall and ports are free (error code 73).
- Monitoring
- Need to get Java client (GridSearcher) working to evaluate
allowing us to comment on our needs
- TRANSP specific items to monitor bogged down at schema definition
- Netlogger
- Using so many ports
- Does not release ports in a timely fashion
- Port range clashed with Globus - Using same range as Globus
and initially with only 10 port range ran out of ports
- MDSplus with Globus
- Seems to hang after a period of time
- MDSplus needs to be restarted to clear
- TRANSP writing to MDSplus
- Very slow to DIII-D (phobus)
- Related to tree editing?
- Akenti/Globus
- Infrastructure error reporting - when Schissel not authorized
error message must be user friendly
- Akenti should be distributed as part of Globus
- Need a system admin manual for Akenti
- Globus/MDSplus
- If not logged into Grid, handle this gracefully to inform user - for
example when trying to run PreTRANSP
- TRANSP/Globus run implementation
- Some questions raised here if implementation method is
what is recommended by Globus group
- How do we issue certificates to non-US scientists?
- MultiGraph has trouble mapping DIII-D data due to MDSplus tree errors
The following are issues that have been raised while discussing
the demonstration with the scientific audience
- Over the course of the meeting we saw approximately half of the 100
attendees
- The concept of Grid computing was new to everyone
- This demo served the beginning of the education process for
the scientific community
- Scientists from DIII-D, NSTX, C-Mod are of course interested in using
this for TRANSP analysis for results to be presented at APS 2002. The
collaboratory can take credit for facilitating science - Very Important.
- Scientist from England are interested in using this system to do physics.
Gave them a 6 month time frame.
Things to remember for Sherwood
- Need to solve intermitent failure
- We do not want PPP - bring hub, figure out how to use DHCP
- How to solve GA/PPPL Firewall issue over the weekend when we
are at Sherwood. We want to run the demo Sunday night at Sherwood
during registration and the reception. Can we get
the range of IP addresses ahead of time?
- Answer run submittal question so we become standard
- Solve Qian's laptop time problem
- Get GridSearcher working and monitoring a few TRANSP quantities
