An overview of Hulu’s metrics platform. Tristan Reid tristan.reid@hulu.com. Prasan Samtani prasan.samtani@hulu.com. What we do. Streaming video service > 5.5 million subscribers > 20 million unique visitors/month > 1 billion ads/month. It all begins with beacons. Living room device
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Cvičení 1. DBS. Úvod. Databázové systémy. Ing. Monika Šimková. Základní informace. Přednášky a potřebné materiály ke studiu jsou k nalezení pro ORACLE skupiny převážně na http ://academy.oracle.com Postup: Introduction to Computer - > Science – Student Sign In
Multimedia DBs. PAA and APCA. Another approach: segment the time series into equal parts, store the average value for each part. Use an index to store the averages and the segment end points. X. X. X. X'. X'. X'. SVD. DFT. DWT. eigenwave 0. 0. Haar 0. eigenwave 1. 1. 0. 0. 0.
Multimedia DBs. Multimedia dbs. A multimedia database stores text, strings and images Similarity queries (content based retrieval) Given an image find the images in the database that are similar (or you can “describe” the query image)
Design ( Logical, Physical ). Analysis. Construction. Adjust data model to a database technology (e.g., relational). Business & information needs. Pros & cons. Create data model. Design storage & input/output.
Modelovanie DBS. Vypracoval: Ing. Michal COPKO. Jazyk pre modelovanie. na modelovanie dátových entít, procesov, vzťahov a súsledností nie len DBS ale aj informačných systémov a softvérových projektov slúži jazyk UML (unified modeling language)
Relational DBs. Basics. Formally understood. Set theoretic Originally defined with an algebra, with Selection, Projection, Join, and Union/Difference/Intersection Declarative calculus that is based on the algebra and supports large grained queries Clean implementation spec
Alterative DBs. Data management in a post transaction-management world. Easy to understand and use Solid formal underpinnings Fast Serves a broad class of application domains Scales in volume. What’s good with RDBMs?.
. 1. Your firm has decided to localize its products and services to meet local market demands. A good approach to use would be _____ segmentation. geographic benefit end-use customer. . 2. A company or store gains a(n) _____ by understanding customer needs better than competitors do and deliver
NoSQL DBs. What are the positives of relational DBs?. Relational Positives. Historical positives of RDBMS: Can represent relationships in data Easy to understand relational model/SQL Disk-oriented storage I ndexing structures Consistent values in DB - transactions.