Slide 1: .
Introduction to CLASSE-IT
- CLASSE-IT team and computing environment
- General philosophy
- User services
Slide 2: Who We Are
Our team: 10 full time staff + many who contribute at the 10-50% level.
| Devin Bougie
|| Assistant IT Director, Linux
|| Dan Riley
|| Linux, networking
| Bill Brangan
|| Help Desk, facilities, printing
|| Mike Roman
|| Mac, A/V
| John Dobbins
|| Control systems
|| Mike Ryan
| Attilio De Falco
|| Software librarian, Compute Farm, Linux
|| Phil Sorensen
|| CHESS, Linux
| Marlin Guest
|| Windows, networking
|| Charlie Strohman
|| Control systems
| Tim O'Connell
|| Werner Sun
|| IT Director
| James Pulver
|| IT Security Liaison, networking, Windows
|| Shijie Yang
|| CHESS, A/V, networking
Slide 3: What We Do
| Lab functions that we support
| Facility operations (on call 24/7)
- Control systems & monitoring for CESR, CHESS, ERL, CBETA
- Data collection for CHESS and CesrTA
- Power outage recovery
| Basic research
- Instrument control/readout for SRF, CMS, g-2, photocathodes, cosmology
- Data analysis & simulation for CesrTA, theorists, CHESS users
| R&D for accelerators and instrumentation
- Engineering for CHESS-U and CBETA
- Development of beam-size monitors for CESR
| Multi-institute centers/collaborations
- Accounts and collaboration tools for CBB, CLEO, CBETA
| Business and administration
- HR, accounting, purchasing, project scheduling
| Seminars, workshops, communications
- A/V equipment, event recording, visitor support, websites
Many different uses of computing supported with one unified environment.
Slide 4: CLASSE-IT Infrastructure
Slide 5: Our Philosophy
- We have a large and complex computing environment, limited resources, security and audit concerns, Cornell and funding agency requirements.
- All CLASSE computers/software/networks are centrally managed.
- Ensures compliance with Cornell policies, makes overall support manageable.
- We provide full support only for CLASSE computers and services.
- Not personal computers or third-party services (e.g. email, calendar, wi-fi).
- We centralize services wherever possible:
- File storage, software, networked Linux systems, wiki.
- Similar model to other large facilities (Fermilab, SLAC, CERN, Brookhaven).
- But there is flexibility within this structure:
- We know how to support a diverse and constantly changing research program.
- Communication is essential -- please discuss your needs with us!
- We can be your collaborators.
Slide 6: Where To Find Help
- To reach CLASSE-IT:
- Submitting service requests gives the best results.
- We work as a team, and tickets keep everyone informed.
- We get hundreds of emails/day. With a ticket, your request doesn't get lost.
- Please don't report problems to individual team members.
- Help us help you: give us as many details as possible.
- Tell us what you need and why -- the context is key.
- Let us know if your ticket is urgent. Otherwise, default max response time: 1-2 business days.
- Visit the CLASSE-IT Help Desk
- In case of emergency:
- Page CLASSE-IT on the beamphone OR consult our CallList.
- Also submit a service request (if possible).
- Examples of emergencies: stoppage in CESR operations or CHESS data collection, paper submission deadline, broken projector for visiting speaker.
- Regular business hours:
- Monday - Friday: approx. 8:00 AM - 5:30 PM (short daily job meeting at 9:30 AM).
- Exception: weekly staff meeting Thursdays 10:00 AM - noon.
Slide 7: Overview of User Services
|| Computing for research
| CLASSE-managed desktops/laptops
|| Hardware development
| Web browsing
|| Experimental control systems
|| Data acquisition
| File storage and backups
|| Data storage and archival
| Productivity software
|| Data analysis platforms, Linux utilities
| Antivirus, endpoint security
|| Specialized software licenses and code compilers
| Remote access
|| CLASSE Compute Farm
- Much more information at our homepage.
- Everything is designed to work together, on Linux and Windows and Mac, using one CLASSE account per user.
Slide 8: Some More Details On...
- CLASSE-Managed Systems
- CLASSE Computer Accounts
- Central Data Storage
- Collaboration Tools
- Installing Software
- Remote Login
- Linux and Compute Farm
Slide 9: CLASSE-Managed Systems
- CLASSE computers are designed to be:
- You can log into any CLASSE system. Consistent user experience across all systems.
- Compliant with Cornell policies on security updates, antivirus software, locking screensavers, etc.
- Centrally connected:
- Easy access to central storage (a.k.a. samba), Compute Farm, WinAPP
- CLASSE computers are not personal computers and not like other computers at Cornell.
- We think of them as portals to a centralized pool of computing resources.
- Things to know: SystemExpectations
- CLASSE-IT is responsible for all computers purchased through CLASSE.
- Administrative access is restricted.
- Windows/Linux: OS and software updates installed every Tuesday (early AM).
- We can usually service your computer from afar, by logging in remotely.
Slide 10: CLASSE Computer Accounts
- One username/password for all CLASSE computers (Linux, Windows, Mac), web pages, VPN, etc.
- CLASSE username = Cornell NetID (if you have one)
- CLASSE password must be different from your Cornell NetID password
- More info at ClasseAuthentication.
- Change or reset your password:
- Some CHESS systems, CHESS Allstaff, legacy operating systems, Replicon
Slide 11: Central Data Storage
- Very important: Do not store files locally!
- Local disks on CLASSE computers are not backed up.
- Instead, use central storage (a.k.a. samba):
- Enterprise-class redundant disk arrays, capacity almost 1 PetaByte (almost 1,000,000 GigaBytes).
- Backed up on a regular basis. If you delete a file accidentally, ask for a restore.
- Home directory (1 GB) and personal user directory (2 GB) should be used sparingly.
- Most files should go in the space allocated to your project:
- Can be accessed from any CLASSE system: Windows, Linux, or Mac.
- On a non-CLASSE network, access samba through our Virtual Private Network (VPN).
Slide 12: Confidential Data
- Cornell defines "confidential (level 1) data" as:
- Social Security number
- Credit card number
- Driver's license number
- Bank account number
- Protected health information, as defined in the Health Insurance Portability and Accountability Act (HIPAA)
- By CLASSE policy, confidential data is not allowed on any CLASSE computer.
- If your job requires you to collect confidential data, please contact the CLASSE Executive/HR Staff Assistant.
- Cornell services:
- Cornell Box: good for collaboration, not for long-term storage (no backups)
- Zoom for videoconferencing
Slide 14: Installing Software
- If you have a software need, please submit a service request to discuss.
- We try to avoid proliferation of software, because we are responsible for long-term maintenance and license compliance.
- We might have a similar package already installed, or a different way of doing what you want.
- Cornell also requires a security review for new software purchases.
- Please review our SoftwareInstallPolicy.
- Many common packages available centrally on Linux:
- Drastically reduces maintenance overhead.
- Matlab, Mathematica, ImageJ, Opera, ANSYS, etc.
- Code development in C, C++, Fortran, Python, etc.
- Easily accessible from Windows, use central storage for files
- Windows and Mac software:
- Some software available as self-service downloads (wrapped with Cameyo).
Slide 15: Remote Login
- For remote access to a CLASSE Linux computer:
- From Linux or Mac: SSH or X2Go
- From Windows: PuTTY or Xming or X2Go or
- Works both on and off CLASSE networks.
- For large file transfers (100+ GB): Globus
Slide 16: Linux and Compute Farm
- Linux is the preferred operating system at CLASSE:
- Our core infrastructure servers are running Linux.
- Standard for advanced scientific computing.
- Centralized access to software, computing resources, and storage.
- Code development: C/C++, Java, Python, Fortran, Perl, shell scripting
- General purpose login node: lnx201.classe.cornell.edu
- This is a shared resource. Please limit its use to brief interactive jobs.
- Getting started: LinuxIntroduction
- CPU-intensive jobs should use the CLASSE Compute Farm
- 60 nodes and growing, can run hundreds of jobs in parallel.
- Supports interactive and batch jobs.
- Queueing system guarantees equitable distribution of resources.
Slide 17: Getting Around (Linux)
Slide 18: Getting Around (Windows)
Slide 19: Getting Around (Non-CLASSE)
Slide 20: Summary
- CLASSE-IT is very complex because of the many projects and communities it serves.
- Any single user or any single project only sees the tip of the iceberg.
- Our policies and practices are aimed at minimizing the degree of complexity in the system, while fulfilling the lab's research and business needs.
- We see our computing environment as a giant chessboard: each piece affects every other piece.
- Our overarching concern is to enable the research and business goals of CLASSE, and always in a sustainable fashion.
Please share your needs and feedback with us!