Table 2.

UDS Quality Attributes

Attribute	Description
Functionality	Content-addressed storage is unchangeable, authenticated, and transparent for end user
	Architecture is transparent, making it easy to integrate with EMC2 TM storage products, other systems, or develop in-house applications
Security	Technology (WORM, AEs encryption), assure data integrity, and reliability
	Mapped file pointers in database over file UDS system
	Redundancy and fault-tolerant mirror architecture (CAS–DAS)
Flexibility	Addressable by numerous content sources
	Copy tool with logging for compliant data migration
	Scales from GB to TB
Portability	Hardware-independent, system can be installed on 32/64-bits architecture
	Platform-independent, system can be installed on Linux RedHat Enterprise 4.0, 5.0, or Windows XP
	Software architecture modeled in UML
	Database normalized complies with DIM
	Database interface (JDBC) in JAVA implementation
Efficiency	Low time access (3 s o less) for query and retrieve images
	DICOM database backup is easy, simple, secure, and quickly (less than 10 min to 32-TB storage)
	187 AEs simultaneously query/retrieve DICOM objects
Economy	Investment protection
	Easy data migration
	Lowest total cost for archiving solutions
Maintainability	Architecture is based on a redundant array of independent nodes, and so is highly scalable to hold TB of content
	Enable multiple independent clusters to be virtualized and presented as unique system
	Object-oriented design and programming