A Uniform Access to

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A Uniform Access to Metacomputing File System
Fajin Wang TTU SORCER Lab
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Agenda
1. Problem statement 2. Objective 3.
Methodology 4. Schedule 5. Benefits 6. Thesis
validation
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1. Problem
1.1) Two file systems in SORCER 1.1.1)
SORCER
Service Registry
Discovery Publish
Discovery Lookup
Service Requestor
Service Provider
Bind Execute
SOA
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1. Problem
1.1) Two file systems in SORCER 1.1.1)
SORCER
Federated S2S environment to ...
Build new services Convert legacy apps to
dynamic SORCER services (J2EE technology)
Assemble SORCER services together (RMI, Jini,
Rio, JXTA, WS technologies) Create modern
clients accessing services
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1. Problem
1.1) Two file systems in SORCER 1.1.2)
SILENUS
User Interface
Metadata Store
SORCER
Optimizer
Byte Store
WebDAV Adapter
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1. Problem
1.1) Two file systems in SORCER 1.1.3)
FileStore
SORCER
FileStore
User Interface
DBMS
Servlet Engine
Browser
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1. Problem
1.2) Two file systems in SORCER 1.2.1)
Four different user agents are available
FileStore Web-based document manager
SILENUS Service UI,
SILENUS MIDP user
agent,
SILENUS NFS adapter both
Programmatic API 1.2.2) No single direct
access point and friendly user
interface to the both files systems.
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Agenda
1. Problem statement 2. Objective 3.
Methodology 4. Shedule 5. Benefits 6. Thesis
validation
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2 Objective
A uniform access to shared file systems in the
SORCER environment
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Agenda
1. Problem statement 2. Objective 3.
Methodology 4. Schedule 5. Benefits 6. Thesis
validation
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3 Methodology
3.1) Approach requirements 3.1.1)
Distributed 3.1.2) Interoperable
3.1.3) Support authoring/versioning 3.2)
Approaches 3.2.1) WebDAV protocol
3.2.2) Service provider with Service UI
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3 Methodology
3.3) WebDAV protocol 3.3.1) Web-based
Distributed Authoring and Versioning
- Goal Define
the HTTP extensions necessary to
enable distributed web authoring tools
to be broadly
interoperable, while supporting user
needs -
Make the web a writable, collaborative medium
- Create an Internet File
System - Enable
interoperability of tools for distributed
web authoring
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3 Methodology
3.3) WebDAV protocol 3.3.2) Server
Microsoft IIS 5/6,
Exchange 2000, Sharepoint
Apache mod_dav , Jakarta Slide
Oracle
Internet File System
Adobe InScope
W3C Jigsaw
IBM DAV4J
(DeveloperWorks)
Client Remote File Access
Apple Mac OS X
webdavfs
Microsoft Windows Web Folders
DAV Explorer
Application Software
Microsoft Office 2000/XP (Word,
Excel, PowerPoint, Publisher)
Adobe Photoshop 6, Illustrator 10,
Acrobat 5, In Design 2
Web Site Authoring Adobe Go Live 5 Macromedia
Dreamweaver 4 XML
editors Documentor, XML Spy, XMetal

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3 Methodology
3.3) WebDAV protocol 3.3.3) Design
Slide Server
DAV Explorer
SILENUS
WebDAV Adapter
FileStore
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3 Methodology
3.4) Service UI 3.4.1) A user interface
- "attached" to a Jini
technology service, using
a loosely coupled architecture.
- interfaces with the backend service
through the service's proxy.
Service Registry
Service Requestor
Service UI
UI Factory
Service Provider
Proxy
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3 Methodology
3.4) Service UI 3.4.2) Design - Use cases
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3 Methodology
3.4) Service UI 3.4.2) Design - Components
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3 Methodology
3.4) Service UI 3.4.2) Design
Communication diagram - Browse
dfsDocumentFileStore
mdsMetadataStore
uiSorcerExplorer
1.1.2a expandNode(Msuid)Map
1.1.2b getDirectories(
DocumentDescriptor)
DocumentDescriptor 1.1.3 getDirectoryContent(
DocumentDescriptor)
DocumentDescriptor
1.1 expandNode(Uri)Map
1.1.1 expandNode(Uri)Map
adapterSorcerExplorerAdapter
proxySorcerExplorerFacade
Figure 2 Communication diagram for Use Case
"Browse"
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3 Methodology
3.4) Service UI 3.4.2) Design
Communication diagram - Download
3 download
3.1.2a.1 openInputFileChannel( )
ReadByteChannel
explorerSorcerExplorer
accessorFileChannelAccessor
3.1.2a.2 openReadable(Bsuid)
InputFileChannelAccessor
3.1.2b.1 read(File)void
3.1 download(Uri)Object (InputFileChannelAccessor
/InputStreamProxy)
bsByteStore
adapterSorcerExplorerAdapter
dfsDocumentFileStore
3.1.1 download(Uri)Object (InputFileChannelAccess
or/InputStreamProxy)
3.1.2b getInputDescriptor (DocumentDescriptor)
DocumentDescriptor
3.1.2a download(Msuid) InputFileChannelAccess
or
proxySorcerExplorerFacade
coordCoordinator
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Agenda
1. Problem statement 2. Objective 3. Methodology
4. Schedule 5. Benefits 6. Thesis validation
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Schedule
Accomplished Literature review Review and
analyze Jini Network Technology, service UI,
WebDAV, SILENUS façade, and SORCER FileStore
service Developed uniform access methodology and
relevant use cases for accessing
metacomputing file system Built a prototype to
verify the concept of uniform access
methodology Feasibility implementation of
WebDAV adapter, Service UI for SILENUS
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Schedule
02/08/07 Proposal presentation 02/11/07
Design of WebDAV adapter 02/14/07 Design of
Service UI 02/18/07 Model Verification 02/20/07
Implementation of WebDAV adapter 03/01/07
Implementation of Service UI 03/20/07
Validation of use cases 03/25/07 Deploy in
SORCER 03/29/07 Defense
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Agenda
1. Problem statement 2. Objective 3. Methodology
4. Schedule 5. Benefits 6. Thesis validation
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Benefits
1. Friendly and intuitive graphical user
interface 2. Non confusing single access point
to both file systems 3. Reduction of
effort-time-cost through work
simplification 4. Improved file access quality
through work simplification 5. WebDAV
enables distributed web authoring tools to
be broadly interoperable 6. Service UI offers
Zero - install 7. Framework is extensive.
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Agenda
1. Problem statement 2. Objective 3. Methodology
4. Schedule 5. Benefits 6. Thesis validation
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Proposed Methodology
1. WebDAV 2. Service UI
Service requestor
WebDAV Client
SILENUS
Sorcer Explorer
WebDAV Adapter
SorcerExplorer Facade
WebDAV Server
FileStore
Service Registry
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Thesis Validation
1. Upload a file from the WebDAV client,
check this file on Service UI Download it,
check if data has been changed. 2. Upload a
program (e.g. proth), check if it can be
picked up by a Caller
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Q A