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Extending Operating System Research into the Cloud – The SkyLab Project. Alexander Schmidt HPI, Potsdam University, Germany Cloud Futures 2010. Operating Systems and Middleware. Prof. Dr. rer . nat. habil . Andreas Polze Dipl.-Inf. Alexander Schmidt - PowerPoint PPT Presentation
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Extending Operating System Research into the Cloud – The SkyLab Project
Alexander Schmidt
HPI, Potsdam University, Germany
Cloud Futures 2010
Operating Systems and Middleware
Prof. Dr. rer. nat. habil. Andreas PolzeDipl.-Inf. Alexander Schmidt
Hasso-Plattner-Institute for Software Engineering
at University PotsdamProf.-Dr.-Helmert-Str. 2-3
14482 Potsdam, Germany
Operating Systems and Middleware
Prof. Dr. rer. nat. habil. Andreas PolzeDipl.-Inf. Alexander Schmidt
Hasso-Plattner-Institute for Software Engineering
at University PotsdamProf.-Dr.-Helmert-Str. 2-3
14482 Potsdam, Germany
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
4
Agenda
■ Teaching Operating System at HPI
□ Microsoft Windows Curriculum Resource Kit
□ Windows Research Kernel
□ Programming Projects
■ SkyLab
■ Conclusions
msdnaa.net - featured curriculum content
AP 03/06
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
Curriculum Resource Kit Background
■ CRK + WRK + ProjectOZ
□ Initiatives to encourage and support teaching Windows in OS curricula
□ Based on current Microsoft technology
□ Freely accessible Windows Research Kernel (WRK)
◊ Stripped down Windows Server 2003
◊ Architected by Dave Probert
□ ProjectOZ: environment for OS experiments based on native NT APIs
◊ Authored by Dave Probert
■ Windows as a vehicle for explaining OS concepts
□ Started out as an add-on to a traditional Unix-based OS curriculum; has evolved to a self-contained OS course
□ Requires the incorporation of a fair amount of Unix know how
◊ i.e.; scheduler, file system, inter-process communication, networking
□ Explains the rationales for certain Windows design decisions
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
CRK Course Layout (1)
■ 1. Overview of Operating Systems – (Core) OS1
■ 2. Operating System Principles – (Core) OS2
■ 3. Concurrency – (Core) OS3
■ 4. Scheduling and Dispatch – (Core) OS4
■ 5. Memory Management – (Core) OS5
■ 6. Device Management - The Input/Output System – (Elective) OS6
■ 7. Protection and Security – (Elective) OS7
■ 8. File System – (Elective) OS8
■ 9. Real-time and Embedded Systems – (Elective) OS9
■ 10. Fault-tolerance – (Elective) OS10
■ 11. System Performance Evaluation and Troubleshooting– (Elective) OS11
■ 12. Scripting – (Elective) OS12
■ A. Windows Networking – (Supplementary)
■ B. Comparing the Linux and Windows Kernels (Supplementary)
■ C. Windows – Unix Interoperability (Supplementary)
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
CRK Course Layout (2)
■ 1. Overview of Operating Systems – (Core) OS1
■ 2. Operating System Principles – (Core) OS2
□ 2.1. Structuring of the Windows Operating System (Core)
□ 2.2. Windows Core System Mechanisms (Core)
□ 2.3. Windows on Windows - OS Personalities (Core)
□ 2.4. The Windows API – Naming Conventions, Types (Core)
□ 2.5. OS Principles labs, quizzes, and assignments
■ Further information:
□ Polze and Probert. Teaching Operating Systems – The Windows Case. SIGCSE ’06
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
Windows Research Kernel (WRK)
□ Stripped down Windows Server 2003 sources
◊ Only kernel itself, no drivers, GUI, user-mode components
◊ Missing components: HAL, power management, plug-and-play
□ Released in 2006
□ Freely available to academic institutions
□ Encouraged by license:
◊ Modification
◊ Publication (of excerpts)
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
WRK Assignments
■ Debugging/Instrumenting the WRK
□ Boot phase
□ Process creation
□ Single-step debugging the WRK in a virtual machine
■ Creating a new system call
□ Hide/Show a specified process from the system
□ Memorize hidden processes
□ Implement a system service DLL
■ Implementing a synchronization primitive
□ Implement reader/writer locks inside the WRK
□ Run provided test program
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
Memory Management Project Assignment
□ Design a working set data structure
◊ Manage resident pages
◊ Discuss lookup overhead efficiency
◊ Discuss space complexity
□ Implement page replacement strategy
◊ FIFO
◊ Student-defined alternative
□ Run provided test workload
◊ Document page faults
◊ Experience Belady‘s anomaly
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
13
WRK/CRK Experiences & Observations
■ Virtualization technology
□ Simplified testing
□ Simplified distributing of exercises and demos
□ Available on multiple platforms
■ Steep learning curve
□ Configuration overhead
□ Code complexity
■ Increased usage of personal laptops
□ Support of multiple platforms
□ Variation in operating systems and compute power
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
14
Agenda
■ Teaching Operating System at HPI
■ SkyLab
□ Idea and Concepts
□ Architecture
□ Requirements
■ Conclusions
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
15
Why Skylab?
Courtesy: NASA
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
16
Skylab
SP-401
Skylab, Classroom in SpaceEdited by Lee B. Summerlin
Scientific and Technical Information Office
National Aeronautics and Space Administration
Washington, D.C. 1977
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
17
SkyLab in the Cloud
■ Virtualize laboratory environment
□ No physical machines in university
□ Set of virtual machines in the cloud
■ Migrate exercises and demos into the cloud
□ VM template(s) per exercise
□ Instantiation on demand on lab VMs
■ Facilitate experiments through remote display session
□ Experiments in Web browser
□ Support of various platforms and compute power
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
18
Concepts
■ Roles
□ Faculty
□ Tutor
□ Student
■ Laboratory
□ Number of Workspaces
□ Associated with Faculty
□ Participated by Students
■ Experiment
□ Virtual machine template (demos, experiments)
□ Temporarily assigned to a course
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
19
WRK Repository
Virtualized LaboratoryVirtualized Laboratory
SkyLab Architecture
Persistent Storage
SkyLab Manager
Virtualized Laboratory
Workspace Workspace Workspace
...
Cloud Infrastructure
VM VMVMVM VMVM
VM VMVM
Exp
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
20
SkyLab ― Laboratory Allocation Workflow
SkyLab Manager
Virtualized Laboratory
Workspace Workspace Workspace
...
Faculty
Allocate Lab
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
21
WRK Repository
Virtualized LaboratoryVirtualized Laboratory
SkyLab ―Experiment Instantiation Workflow
Persistent Storage
SkyLab Manager
Virtualized Laboratory
Workspace Workspace Workspace
...
Cloud Infrastructure
VM VMVMVM VMVM
VM VMVM
Exp
Exp.Exp. Exp.
VM
VM
VM
VM
VM
VM
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
22
WRK Repository
Virtualized LaboratoryVirtualized Laboratory
SkyLab ―Running an Experiment
Persistent Storage
SkyLab Manager
Virtualized Laboratory
Workspace Workspace Workspace
...
Cloud Infrastructure
VMVM
VM
Exp
Exp.Exp. Exp.
VM
VM
VM
VM
VM
VM
RDP Session
RDP Dispatch
Persist Updates
Pulling Results
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
24
Which Cloud Platform?
Requirements
■ Arbitrary VM images
■ Remote desktop session
■ Virtual serial port
■ Differencing virtual hard drives
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
25
Agenda
■ Teaching Operating System at HPI
■ SkyLab
■ Conclusions
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
26
Conclusions
■ WRK great for teaching operating systems
■ Personal laptops as alternative to faculty provided CS laboratories
■ SkyLab: virtual laboratory in the cloud for OS projects
□ Set of experiments
□ Execution through Web interface
□ Run experiments wherever you want
■ SkyLab: challenging requirements for Cloud vendors
Cloud Futures 2010 | Alexander Schmidt | April 8, 2010
27
Thank You for Your Attention!
■ WRK great for teaching operating systems
■ Personal laptops as alternative to faculty provided CS laboratories
■ SkyLab: virtual laboratory in the cloud for OS projects
□ Set of experiments
□ Execution through Web interface
□ Run experiments wherever you want
■ SkyLab: demanding requirements
Contact:
[email protected]://www.dcl.hpi.uni-potsdam.de/research/WRK