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Introduction to Flash. Jeremy Johnson & Frank Witmer Computing and Research Services 8 Jul 2014. Outline. Flash specifications What’s New/Changed How to log on File movement and policies Server etiquette Multi-threaded analysis in Stata & R. Flash Specifications. Processor:

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introduction to flash

Introduction to Flash

Jeremy Johnson & Frank Witmer

Computing and Research Services

8 Jul 2014

  • Flash specifications
  • What’s New/Changed
  • How to log on
  • File movement and policies
  • Server etiquette
  • Multi-threaded analysis in Stata & R
flash specifications
Flash Specifications
  • Processor:
    • Intel® Xeon® Processor E5-2667 v2 (25M Cache, 3.30 GHz)
      • Max Turbo Frequency 4GHz
      • 1 Physical CPU – 8 Cores – 16 Threads
  • Memory:
    • 96GB RAM
      • 4 x 16GB 1866MHz DDR3 ECCRAM
  • Disks
    • 1.8TB RAID10 Storage
      • 4 x 900GB 2.5” 10K RPM SAS Drive
  • Video Card
    • NVIDIA Quadro K2000
      • CUDA Parallel-Processing Cores 384
      • Frame Buffer Memory 2 GB GDDR5
what s new changed
What’s New/Changed
  • Usernames and passwords
    • Flash will use identikeys
    • External research colleagues now only need one username/password for both VPN and Flash
      • Contact Jeremy and Steve to set up a new Person of Interest (POI)
  • User profile size limits
    • Minimize use of My Documents, Desktop, etc.
      • 2GB HARD limit
    • Work from F:\ instead
      • 10GB initiallimit
      • If you need more space contact Jeremy
        • Flash is not a file/backup server, so please try and keep storage space down to what is needed and remove what you no longer are using as a courtesy to others
  • No more mapped drives
    • Wilbur had a few mapped drives, this is no longer possible
    • Use the departmental “P” and personal “U” drives
      • If you don’t already have access to these, contact Jeremy
what s new changed1
What’s New/Changed
  • Many new options for connecting
    • New Remote Desktop App
      • iOS (iPad, iPhone), Android (tablets, phones), Win 8, Mac 10.7+
    • RemoteApp
      • Allows you to open Flash applications directly as if installed on your local device
        • Network bandwidth minimized since you’re not bringing over full desktop session
    • Website
      • IE works best and opens apps directly
      • Other browsers work, but will download a .RDP file you have to run for every app you open
  • Mac users need to move to new Remote Desktop App if using 10.7 or above
    • Download from App Store
what s new changed2
What’s New/Changed
  • Auto logoff after 14 days on Remote Desktop
    • Timer resets when you log in
  • Auto logoff after 5 days on RemoteApp
    • Timer resets when you open a RemoteApp
  • Auto delete User profile of inactive accounts after 90 Days (Back your stuff up!)
    • Includes F:\Private\username
    • Does not include F:\Shared
    • Does not deny access to Flash, only removes your files
      • Next time you log in, new (empty) folders will be recreated automatically
  • Remote Desktop
  • RemoteApp
  • Website
  • CU IdentiKey
file system
File System
  • As with Wilbur, the file system is not backed up
  • No files will be migrated from Wilbur, so you will need to copy any that you need manually
    • If you need to transfer more than 10GB contact Jeremy
  • C:\Users\”identikey”\Documents
    • user read/write permission, but not meant for use
    • space limited
  • F:\Private\”identikey”
    • user read/write permission
  • F:\Shared
    • user read/write permission, user can add permissions for others
  • F:\Shared\Public
    • read/write permission for all
    • anyone can delete, so best to use for short-term sharing of files with other users
transferring files to from flash
Transferring Files To/From Flash
  • Copy & paste files
    • Windows clipboard is shared
  • Your local computer shows up in the Windows Explorer
    • Must be set up to do so through the Remote Desktop application
  • P: and U: drives
    • Automatically mounted, if you don’t see contact Jeremy
  • You may install Stata and R packages to a personal folder
    • R will ask to use a personal library automatically
    • Stata requires a few extra steps:
    • System wide installs should not be needed
      • (These had to be done by Jeremy and required all users to finish and quit the application)
  • You are not able to install new software
  • Installation requests may be made to [email protected]
    • New software requests will be reviewed on a case-by-case basis
server etiquette
Server Etiquette
  • Close all unnecessary applications
    • especially Stata, since IBS is limited to 10 concurrent users
  • Log off when not using the server
    • Click the Start Button then logoff
    • just closing the Remote Desktop window leaves you logged in
  • Monitor your (& other’s) usage using the Task Manager
    • right-click the toolbar at the bottom and select Task Manager then “more details” on the bottomleft
multi threaded analysis in stata
Multi-Threaded Analysis in Stata
  • Stata defaults to using all 16 processors
    • if 8 processors are enough, just request 8 (there are often diminishing returns to using more processors)
    • `set processors 8`
  • Check the list of multi-threaded commands supported by Stata
  • For advanced users, can use the ‘parallel’ module
  • Can also use batch mode for do-files
    • for a file names, type
    • stata –b do bigjob
  • Please automatically ‘exit’ do-files to close Stata
    • See F:\Shared\FlashIntro\
multi threaded analysis in r
Multi-Threaded Analysis in R
  • No ‘easy’ multi-threaded commands
  • Use libraries that support parallel processing
    • e.g. parallel, snow/snowfall, multicore
  • See example in


  • Additional info on parallel computing packages