Horst Severini, Chris Franklin, Josh Alexander, Joel Snow University of Oklahoma Implementing Linux-Enabled Condor in Windows Computer Labs.

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Presentation transcript:

Horst Severini, Chris Franklin, Josh Alexander, Joel Snow University of Oklahoma Implementing Linux-Enabled Condor in Windows Computer Labs

What is Condor? Condor® is a program developed by the University of Wisconsin to allow desktop computers to harness idle time to perform computationally intensive operations. Unclipped Condor in Windows via coLinux DOSAR 2008

Why do you need it? Condor® provides free computing cycles for scientific and research use, which increases supercomputing capacity by acquiring additional computing time on otherwise idle desktop PCs in campus PC labs. Unclipped Condor in Windows via coLinux DOSAR 2008

Condor: Linux vs. Windows Condor inside Linux: full featured Condor inside Windows®: “clipped” – No autocheckpointing – No job automigration – No remote system calls – No Standard Universe Unclipped Condor in Windows via coLinux DOSAR 2008

Lots of PCs in IT Labs At many institutions, there are lots of PC labs managed by a central IT organizations. If the head of IT (e.g., CIO) is on board, then all of these PCs can be Condorized. But, these labs tend to be Windows® labs, not Linux. So you can’t take the Windows® desktop experience away from the desktop users, just to get Condor. So, how can we have Linux Condor AND Windows® desktop on the same PC at the same time? Unclipped Condor in Windows via coLinux DOSAR 2008

Solution Attempt #1: VMware Attempted solution: VMware Linux as native host OS Condor inside Linux VMware inside Linux Windows® inside VMware Tested on ~200 PCs in IT PC labs (Union, library, dorms, Physics Dept) In production for over a year Unclipped Condor in Windows via coLinux DOSAR 2008

VMware Disadvantages Attempted solution: VMware Linux as native host OS Condor inside Linux VMware inside Linux Windows® inside VMware Disadvantages VMware costs money! (Less so now than then.) Crashy VMware performance tuning (straight to disk) was unstable Sensitive to hardware heterogeneity Painful to manage CD/DVD burners and USB drives didn’t work in some PCs. Unclipped Condor in Windows via coLinux DOSAR 2008

A Better Solution: coLinux Cooperative Linux (coLinux) FREE! Runs inside native Windows® No sensitivity to hardware type Better performance Easier to customize Smaller disk footprint and lower CPU usage when idle Minimal management required (~10 h/month) Unclipped Condor in Windows via coLinux DOSAR 2008

Network Issues Networking options Bridged: Each PC has to have a second IP address, so the institution has to have plenty of spare IP addresses available. (Oklahoma solution) NAT: The Condor pool requires a Generic Connection Broker (GCB) on a separate, dedicated PC (hardware $), and has some instability. Switched to OpenVPN.(Nebraska solution) – Nebraska experimented with port forwarding in Windows®, but abandoned it for OpenVPN because of security and usability. Unclipped Condor in Windows via coLinux DOSAR 2008

Monitoring Issue Condor inside Linux monitors keyboard and mouse usage to decide when to suspend a job. In coLinux, this is tricky. Working with James Bley at the University of Kansas, we set up a Visual Basic script on the Windows® side to send the keyboard and mouse information to coLinux. Unclipped Condor in Windows via coLinux DOSAR 2008

Current Status Currently, we have approximately 700 computers running Condor inside coLinux. These computers have been running without significant problem for several months. Unclipped Condor in Windows via coLinux DOSAR 2008

Future Goals Make the installation even easier Allow for additional monitoring of keyboard and mouse usage Vista compatibility Unclipped Condor in Windows via coLinux DOSAR 2008

MC Production at OU Unclipped Condor in Windows via coLinux DOSAR 2008

Questions? Unclipped Condor in Windows via coLinux DOSAR 2008