Who We Are

Devin Bougie	Deputy IT Director, Linux		Mike Ryan	Web applications
Bill Brangan	User support, facilities, printing		Phil Sorensen	CHESS, Linux
Attilio De Falco	Software librarian, Compute Farm, Linux		Charlie Strohman	Control systems, electrical engineering
Marlin Guest	Windows, Mac, networking		Werner Sun	IT Director
James Pulver	IT Security Liaison, networking, Windows		Samantha Weeks	Web applications
Dan Riley	Linux, networking, security		Shijie Yang	CHESS, A/V, networking
Mike Roman	Mac, A/V

What We Do

Lab functions that we support		Examples
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.

CLASSE-IT Infrastructure

Our Philosophy

• We have a large and complex computing environment, limited resources, security and audit concerns, Cornell and funding agency requirements.
• Therefore,
  • 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.

Where To Find Help

• CLASSE-IT or outside support?: see GettingSupport

• 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.
  • 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.

• Documentation: CLASSE-IT homepage, weekly newsletter, videos

Overview of User Services

General		Computing for research
CLASSE-managed desktops/laptops		Hardware development
Web browsing		Experimental control systems
Printing		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.
  • Useful if you know what you're looking for. When in doubt, please submit a service request.
• Everything is designed to work together, on Linux and Windows and Mac, using one CLASSE account per user.

Some More Details On...

• CLASSE-Managed Systems
• CLASSE Computer Accounts
• Central Data Storage
  • Confidential Data
• Collaboration Tools
• Installing Software
• Remote Login
• Linux and Compute Farm

CLASSE-Managed Systems

• CLASSE computers are designed to be:
  • Interchangeable:
    • You can log into any CLASSE system. Consistent user experience across all systems.
  • Safe:
    • 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).
    • Your computer may reboot multiple times.
    • Maintains compliance with Cornell University policies.
  • We can usually service your computer from afar, by logging in remotely.

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:
  • Web interface (requires access to your email)
  • Other methods

• Exceptions:
  • Some CHESS systems, CHESS Allstaff, legacy operating systems, Replicon

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:
    • List of existing filesystems.
  • Can be accessed from any CLASSE system: Windows, Linux, or Mac.
  • On a non-CLASSE network, access samba through our Virtual Private Network (VPN).

• Instructions (with video).

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.

Collaboration Tools

• CLASSE services:
  • CLASSE Wiki for documentation
  • Central storage (a.k.a. samba)
  • XMPP chat service
  • Skype: self-service download, not fully supported

• Cornell services:
  • Cornell Box: good for collaboration, not for long-term storage (no backups)
  • Zoom for videoconferencing

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 packages are installed on a central Windows server (WinAPP).
• Some software available as self-service downloads (wrapped with Cameyo).

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 CLASSE_GRID.exe script.
  • Works both on and off CLASSE networks.

• For remote access to a CLASSE Windows desktop/laptop computer, please submit a service request.

• CLASSE Virtual Private Network (VPN)
  • Access CLASSE services from non-CLASSE networks (eduroam/RedRover):
    • Samba, printers, WinAPP
  • Not needed for SSH, X2Go, wiki
  • Video instructions

• For large file transfers (100+ GB): Globus

• See also RemoteAccess for more information.

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
    • Also, Linux for beginners: https://www.cac.cornell.edu/VW/Linux/

• 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.

Getting Around (Linux)

Getting Around (Windows)

Getting Around (Non-CLASSE)