culate charges, perform rating, as well as format and render bills. Billing will evolve becoming more real time, and decomposed into modules that can be individually accessed via configurable reusable APIs. 6. Customer finance-manages the customer's financial activities. It includes the accounts receivable management functions, credit and collections functions, journals and reporting functions, as well as bill inquiries, including billing disputes and any resulting adjust- ments. As in the case of billing, customer finance will evolve under the network cloud to expose more API-based components that are reusable across platforms. 7. UX-provides a single presentation platform to internal and external users each of which receives a customized view based on role. The UX is divided into the self-service view for external customers, sales agents, care center agents, and other internal users. 8. End-to-end BSS orchestration-these functions identify and manage the business level processes and events required to enable a customer request and interactions between domains. They trigger activities across domains and manage status, provide a tool for cus- tomer care to holistically manage the end-to-end request, as well as the customer relation- ship for the duration of theenablement/activation of the request. Taylor & Francis Taylor & Francis Group http://taylorandfrancis.com Network Data and Optimization Mazin Gilbert and Mark Austin CONTENTS Network Data and the Analytics Layer 8.2 Big Data 8.2.1 Dealing with Big Data's 7Vs 8.2.2 Data Quality 8.2.3 Data Management: Lambda Architecture and Policies 8.2.4 The Hadoop Ecosystem 8.2.4.1 Storage: The HDFS 8.2.4.2 Data Ingestion (Kafka, Flume, Sqoop) 8.2.4.3 YARN (Yet Another Resource Manager) 8.2.4.4 Storage: Nonrelational Databases, NoSQL, Not Only SQL 8.2.4.5 Search (SOLR) 8.2.4.6 Batch Processing (MapReduce, HIVE, PIG) 8.2.4.7 Real-Time and Micro-Batch Processing Using STORM and SPARK 8.2.4.8 Coordination and Workflow Management 8.2.5 Analytics and ML 8.2.5.1 Descriptive vers