An Introduction to Infrastructure Ch 11. Issues Performance drain on the operating environment Technical skills of the data warehouse implementers Operational.

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Presentation transcript:

An Introduction to Infrastructure Ch 11

Issues Performance drain on the operating environment Technical skills of the data warehouse implementers Operational issues such as funding requirements Shop standards

Platforms Source system Staging area Application server Desktop tools

Back Room Factors: The Database Server Size: 100 GB to 250 TB < 100 GB is small 100 to 500 GB is medium over 500 GB is large Volatility: what is the nature and frequency of the update process Users: the number of users as well as their level of knowledge

Back Room Factors: The Database Server Number of business processes (marts.) In some cases there may be a separate platform for each one. There may be an additional central server for management roll ups Nature of use ad hoc queries from power users standardized queries data mining

Back Room Factors: The Database Server Technical support: the hardware, the operating system and the database engine may all require specialized support Software requirements may dictate platform. Financial resources

Operating Systems Mainframes transaction oriented complex administration not parallel Open system (UNIX) servers specialized environment NT servers relatively small capacities (limited numbers of processors and less efficient performance)

Hardware Single processor at a time system Symmetric Multiprocessing (SMP) Multiple processors Shared memory Common bus Massively Parallel Processing (MPP) Multiple processors Distributed memory Distributed bus

Performance Indexing Physical organization Caching and blocking Data distribution Memory Chip architecture

Operations Load window (operational scheduling) Backup Relationship with transaction organization User support Change management

Database Engine Need: Simple Data Access Cross-tab Reporting Fast Response

Database Engine Relational Well understood Include DW support for star joins and fast access Flexible Multidimensional (MOLAP) Extremely fast Pre-calculated combination facts Relatively simple Relatively small (< 10 GB)

Front Room Configuration of desk-top Client/Server Web Supplemental tools