DBST 652 Emerging Database Technologies Many challenging areas are supported by database technology Eg. Web

DBST 652 Emerging Database Technologies Mobile Databases See p Can get just information in one cell (vertical) or data throughout the system (horizontal) MANET – p. 918

DBST 652 Emerging Database Technologies Characteristics that affect our databases– High communication latency Intermittent connectivity Limited battery life Changing location

DBST 652 Emerging Database Technologies To handle challenges: Use caching Work offline Use broadcasting Keep track of client locations

DBST 652 Emerging Database Technologies Major data management issues for this type of database See p – good summary

DBST 652 Emerging Database Technologies Mobile Databases – Data Management Issues Mobile databases are like distributed databases Many issues like where data resides, query processing, recovery and fault tolerance, how to design

DBST 652 Emerging Database Technologies World Wide Web Access – CGI, JDBC, DBMS Vendor supplied software JDBC – set of Java classes to access relational DBs through SQL Vendor middleware products

DBST 652 Emerging Database Technologies Web has changed demand on databases 24 X 7 – not a trivial change Security Migration of data to more robust support structures

DBST 652 Emerging Database Technologies Multimedia Databases Types of multimedia: Text, graphics, images, animations, video (sequenced photos – presented at specific rate), structured audio (sequenced audio components), audio (strings of bits in digitized form),mixed

DBST 652 Emerging Database Technologies Multimedia – Data Management Issues Modeling, design, storage, queries and retrieval, performance Some vendors have some support for multimedia data – see p. 1024

DBST 652 Emerging Database Technologies Geographic Information Systems – “…collect, model, store, and analyze …properties of of the geographical world.” 2 types of data – spatial and nonspatial

DBST 652 Emerging Database Technologies GIS applications – cartographic, digital terrain, geographic objects Many technical challenges Hard to get relational databases to handle this type of data and operations

DBST 652 Emerging Database Technologies GIS – ARC/INFO 3 tables – node attribute, arc attribute, and polygon attribute Queries – typical – adjacency, containment, connectivity

DBST 652 Emerging Database Technologies GIS – expanding area for databases From FOSE – DC Map Info

DBST 652 Emerging Database Technologies Genome Data Management Challenging data characteristics – see p