Technology | | | |
Direct-attached storage
(DAS) | - Simplicity
- Low initial cost
- Ease of management
| - Storage for each server must be administered separately
- Inconvenient for data transfer in network environments
- Server bears load of processing applications
| - Data and application sharing
- Data backup
- Data archiving
|
Technology | | | |
| Disk library | - High speed
- High storage capacity
- High data availability
| - Not as quickly accessible as DAS; intended for "write once, read rarely" data
| - Disk-to-disk (D2D) backup
- Data archiving
- Near line storage
|
Technology | | | |
Disk-to-disk-to-tape
( D2D2T ) | - Redundancy
- High read/write speed
- Unlimited capacity with multiple tapes
| | - Incremental backups
- Storage virtualization
- Offsite storage
- Data archiving
|
Technology | | | |
Fibre Channel
(See Storage area network below) | - Used to transmit data between devices at gigabit speeds
- Frequently used in storage area networks (SANs)
- Flexible in terms of distance
| - High cost
- Management complexity
| - Large databases
- Bandwidth-intensive applications
- Storage area networks (SANs)
- Offsite storage
- Mission-critical applications
|
Technology | | | |
iSCSI
(See Storage area network below) | - Used to transmit data between devices using the Internet Protocol (IP)
- Frequently used in storage area networks (SANs)
- More flexible in terms of distance than Fibre Channel (but not as fast)
| - May not compare favorably with Fibre Channel for large database transfers
- Management complexity
| - Applications involving remotely distributed databases
- Storage area networks (SANs)
- Offsite storage
- Mission-critical applications
|
Technology | | | |
| Magnetic tape | - Low cost per megabyte
- Portability
- Unlimited capacity with multiple tapes
| - Inconvenient for quick recovery of individual files or groups of files
| - Data archiving
- Limited-budget businesses
- Offsite storage
|
Technology | | | |
Network-attached storage
(NAS) | - Fast file access for multiple clients
- Ease of data sharing
- High storage capacity
- Redundancy
- Ease of drive mirroring
- Consolidation of resources
| - Less convenient than storage area network (SAN) for moving large blocks of data
| - Data backup
- Data archiving
- Redundant storage
|
Technology | | | |
Redundant array of independent disks
(RAID) | - High speed
- High storage capacity
- High data availability
- High reliability
- Security
- Fault tolerance
| - Users may develop false sense of security
- Recovery from failure is difficult in some systems
- High cost for optimum systems
| - Swap files
- Internet service providers
- Redundant storage
|
Technology | | | |
Storage area network
(SAN) | - Excellent for moving large blocks of data
- Exceptional reliability
- Wide availability
- Fault tolerance
- Scalability
| - High cost
- Lack of standardization
- Management complexity
| - Large databases
- Bandwidth-intensive applications
- Mission-critical applications
|
New Advancements in Grid Storage Technology -- 
