Table of Contents
Distributed File Systems Part I
Issues in Centralized File Systems
B*-Tree Files
Issues in Centralized File Systems
Directories
Directories
Directories
Issues in Centralized File Systems
Contiguous Allocation of File to Disk Blocks
Linked Allocation of File to Disk Blocks
Indexed Allocation of File to Disk Blocks
UNIX I-node
UNIX Directories
I-node Allocation of File to Disk Blocks
I-node Allocation of File to Disk Blocks
Security in Centralized Systems
What Is Security?
Storing Protection Data
Access Control Lists and Capabilities
UNIX Protection Model
Protection Bits for Files
Authentication Methods
Passwords
Users, User IDs and the Superuser
Groups and Group Identifiers
Groups and Group Identifiers
The Superuser
Distributed File Systems
Distributed File Systems
Distributed File Systems: directory service interface
Distributed File Systems: directory service interface
Distributed File Systems: naming
Distributed File Systems: two-level naming
Semantics of File Sharing
Semantics of File Sharing
Semantics of File Sharing Issues in Distributed File Systems
Semantics of File Sharing
Semantics of File Sharing
Semantics of File Sharing
Semantics of File Sharing
Semantics of File Sharing
Distributed File Systems Part II
Distributed File System Implementation
Distributed File System Implementation: File Usage Patterns
Distributed File System Implementation: File Usage Patterns
File Usage Patterns on the Web
File Usage Patterns on the Web
Distributed File System Implementation: System Structure
Distributed File System Implementation: System Structure
Distributed File System Implementation: Name Lookup
Distributed File System Implementation: Name Lookup
Distributed File System Implementation: Name Lookup
Distributed File System Implementation: State Info
Distributed File System Implementation: State Info
Distributed File System Implementation: State Info
Distributed File System Implementation: Caching
Distributed File System Implementation: Caching
Cache Performance
Cache Performance
Cache Performance
Cache Performance
Cache Performance
Client Cache Location Issues
Client Cache Location Issues
Client Cache Location Issues
Cache Consistency
Cache Consistency
Cache Consistency
Cache Consistency
Distributed File Systems Part III
Distributed File System Implementation: File Replication
Distributed File System Implementation: Update Protocols
Update Protocols: Primary Copy
Update Protocols: Primary Copy
Update Protocols: Voting (simple majority)
Update Protocols: Voting (simple majority)
Update Protocols: Voting (simple majority)
Update Protocols: Voting (simple majority)
Update Protocols: Voting (simple majority)
Update Protocols: Quorum based voting
Update Protocols: Quorum based voting
Update Protocols: Quorum based voting
Update Protocols: Quorum based voting
Update Protocols: voting with ghosts
PPT Slide
Update Protocols: voting with ghosts
Distributed File System Implementation: NFS
NFS Architecture
NFS Protocols
NFS Protocols
NFS: Sun's Implementation
NFS: SUN’s Implementation
NFS: SUN’s Implementation
NFS: SUN’s Implementation
Lessons Learned in Distributed File Systems Design
Distributed File Systems Part IV
Hierarchical Mass Storage Systems
On-line data requirements
On-line data requirements
On-line data requirements
On-line data requirements
NASA’s Center for Computational Science Total Terabytes Stored
NASA’s Center for Computational Science Workload Intensity
Hierarchical Mass Storage Systems
Hierarchical Mass Storage Systems
Mass Storage Systems: Disk Cache
Mass Storage Systems: Cache Miss
Mass Storage Systems: Migration between levels
Mass Storage System Architectures
Host-attached MSSs
Host Attached Device Based Mass Storage System
Network-attached MSSs
Transfer Protocols: Device to Device Transfer
Network-attached MSSs
PPT Slide
Robotic Tape Library
Examples of Devices for MSSs
Examples of Devices for MSSs
File Systems for MSSs
Mass Storage System Example: “Unitree Central File Manager”
Unitree I/O Architecture
Unitree Diagram
Workload Characterization
Host-attached MSSs
Queuing Network Model
Workload Intensity Increase Results
Client and Server Compression
File Abstraction
Network-attached MSSs
Queuing Network Model
HA Based vs. NA Based MSSs
Scalability
PPT Slide
PPT Slide
PPT Slide
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