Sökning: "Column-oriented database"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Column-oriented database.

  1. 1. Compression Selection for Columnar Data using Machine-Learning and Feature Engineering

    Master-uppsats, Malmö universitet/Institutionen för datavetenskap och medieteknik (DVMT)

    Författare :Douglas Persson; Ludvig Juelsson Larsen; [2023]
    Nyckelord :Machine Learning; XGBoost; Classification; Feature Engineering; Compression Algorithms; Data Encodings; Database Management System DBMS ; Column- Oriented DBMS;

    Sammanfattning : There is a continuously growing demand for improved solutions that provide both efficient storage and efficient retrieval of big data for analytical purposes. This thesis researches the use of machine-learning together with feature engineering to recommend the most cost-effective compression algorithm and encoding combination for columns in a columnar database management system (DBMS). LÄS MER

  3. 2. Integrating dictionaries in a column-oriented database.

    Kandidat-uppsats, Umeå universitet/Institutionen för datavetenskap

    Författare :Melinda Vestberg; [2023]
    Nyckelord :Column-oriented database; dictionary; compression techniques; encoding;

    Sammanfattning : In today's data-driven world, managing large volumes of data has become a common challenge. Data-driven businesses often face the task of effectively handling and analysing such extensive datasets when real-time analysis plays a crucial role to make informed decisions. LÄS MER

  4. 3. Consequences of converting a data warehouse based on a STAR-schema to a column-oriented-NoSQL-database

    Magister-uppsats, Högskolan i Skövde/Institutionen för informationsteknologi

    Författare :Rebecca Bodegård Gustafsson; [2018]
    Nyckelord :column-database; datawarehouse; nosql; apache; hbase; sql;

    Sammanfattning : Data warehouses based on the relational model has been a popular technology for many years, because they are very reliable due to their ACID-properties (Atomicity, Consistency, Isolation, and Durability). However, the new demands on databases today due to increasing amounts of data and data structures changing do mean that the relational model might not always be the optimal choice. LÄS MER

  5. 4. Performance Evaluation of MMAPv1 and WiredTiger Storage Engines in MongoDB : An Experiment

    Master-uppsats, Blekinge Tekniska Högskola/Institutionen för datalogi och datorsystemteknik

    Författare :Rohith Reddy Gundreddy; [2017]
    Nyckelord :MMAPv1; WiredTiger; MongoDB; Performance Evaluation;

    Sammanfattning : Context. As the data world entered Web 2.0 era, there is loads of structured, semi-structured and unstructured data growing enormously. The structured data can be handled efficiently by SQL databases. LÄS MER

  7. 5. En jämförelse mellan databashanterare med prestandatester och stora datamängder

    Uppsats för yrkesexamina på grundnivå, KTH/Data- och elektroteknik

    Författare :Thomas Brander; Christian Dakermandji; [2016]
    Nyckelord :Database managment system; Performance test; Execution Time; Large data sets; Microsoft SQL Server; Cassandra; NuoDB; Database queries; Test environment; Databashanterare; Prestandatest; Exekveringstid; Stora datavolymer; Microsoft SQL Server; Cassandra; NuoDB; Databasfrågor; Testmiljö;

    Sammanfattning : Företaget Nordicstation hanterar stora datamängder åt Swedbank där datalagringen sker i relationsdatabasen Microsoft SQL Server 2012 (SQL Server). Då det finns andra databashanterare designade för stora datavolymer är det oklart om SQL Server är den optimala lösningen för situationen. LÄS MER