Governing Your Cloud-Based Enterprise Data Lake
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Mapreduce-Based D ELT Framework to Address the Challenges of Geospatial Big Data
International Journal of Geo-Information Article MapReduce-Based D_ELT Framework to Address the Challenges of Geospatial Big Data Junghee Jo 1,* and Kang-Woo Lee 2 1 Busan National University of Education, Busan 46241, Korea 2 Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea; [email protected] * Correspondence: [email protected]; Tel.: +82-51-500-7327 Received: 15 August 2019; Accepted: 21 October 2019; Published: 24 October 2019 Abstract: The conventional extracting–transforming–loading (ETL) system is typically operated on a single machine not capable of handling huge volumes of geospatial big data. To deal with the considerable amount of big data in the ETL process, we propose D_ELT (delayed extracting–loading –transforming) by utilizing MapReduce-based parallelization. Among various kinds of big data, we concentrate on geospatial big data generated via sensors using Internet of Things (IoT) technology. In the IoT environment, update latency for sensor big data is typically short and old data are not worth further analysis, so the speed of data preparation is even more significant. We conducted several experiments measuring the overall performance of D_ELT and compared it with both traditional ETL and extracting–loading– transforming (ELT) systems, using different sizes of data and complexity levels for analysis. The experimental results show that D_ELT outperforms the other two approaches, ETL and ELT. In addition, the larger the amount of data or the higher the complexity of the analysis, the greater the parallelization effect of transform in D_ELT, leading to better performance over the traditional ETL and ELT approaches. Keywords: ETL; ELT; big data; sensor data; IoT; geospatial big data; MapReduce 1. -
A Survey on Data Collection for Machine Learning a Big Data - AI Integration Perspective
1 A Survey on Data Collection for Machine Learning A Big Data - AI Integration Perspective Yuji Roh, Geon Heo, Steven Euijong Whang, Senior Member, IEEE Abstract—Data collection is a major bottleneck in machine learning and an active research topic in multiple communities. There are largely two reasons data collection has recently become a critical issue. First, as machine learning is becoming more widely-used, we are seeing new applications that do not necessarily have enough labeled data. Second, unlike traditional machine learning, deep learning techniques automatically generate features, which saves feature engineering costs, but in return may require larger amounts of labeled data. Interestingly, recent research in data collection comes not only from the machine learning, natural language, and computer vision communities, but also from the data management community due to the importance of handling large amounts of data. In this survey, we perform a comprehensive study of data collection from a data management point of view. Data collection largely consists of data acquisition, data labeling, and improvement of existing data or models. We provide a research landscape of these operations, provide guidelines on which technique to use when, and identify interesting research challenges. The integration of machine learning and data management for data collection is part of a larger trend of Big data and Artificial Intelligence (AI) integration and opens many opportunities for new research. Index Terms—data collection, data acquisition, data labeling, machine learning F 1 INTRODUCTION E are living in exciting times where machine learning expertise. This problem applies to any novel application that W is having a profound influence on a wide range of benefits from machine learning. -
2020 Global Data Management Research the Data-Driven Organization, a Transformation in Progress Methodology
BenchmarkBenchmark Report report 2020 Global data management research The data-driven organization, a transformation in progress Methodology Experian conducted a survey to look at global trends in data management. This study looks at how data practitioners and data-driven business leaders are leveraging their data to solve key business challenges and how data management practices are changing over time. Produced by Insight Avenue for Experian in October 2019, the study surveyed more than 1,100 people across six countries around the globe: the United States, the United Kingdom, Germany, France, Brazil, and Australia. Organizations that were surveyed came from a variety of industries, including IT, telecommunications, manufacturing, retail, business services, financial services, healthcare, public sector, education, utilities, and more. A variety of roles from all areas of the organization were surveyed, which included titles such as chief data officer, chief marketing officer, data analyst, financial analyst, data engineer, data steward, and risk manager. Respondents were chosen based on their visibility into their organization’s customer or prospect data management practices. Page 2 | The data-driven organization, a transformation in progress Benchmark report 2020 Global data management research The data-informed organization, a transformation in progress Executive summary ..........................................................................................................................................................5 Section 1: -
Value of Data Management
USGS Data Management Training Modules: Value of Data Management “Data is a precious thing and will last longer than the systems themselves.” -- Tim Berners-Lee …. But only if that data is properly managed! U.S. Department of the Interior Accessibility | FOIA | Privacy | Policies and Notices U.S. Geological Survey Version 1, October 2013 Narration: Introduction Slide 1 USGS Data Management Training Modules – the Value of Data Management Welcome to the USGS Data Management Training Modules, a three part training series that will guide you in understanding and practicing good data management. Today we will discuss the Value of Data Management. As Tim Berners-Lee said, “Data is a precious thing and will last longer than the systems themselves.” ……We will illustrate here that the validity of that statement depends on proper management of that data! Module Objectives · Describe the various roles and responsibilities of data management. · Explain how data management relates to everyday work. · Emphasize the value of data management. From Flickr by cybrarian77 Narration:Slide 2 Module Objectives In this module, you will learn how to: 1. Describe the various roles and responsibilities of data management. 2. Explain how data management relates to everyday work and the greater good. 3. Motivate (with examples) why data management is valuable. These basic lessons will provide the foundation for understanding why good data management is worth pursuing. 2 Terms and Definitions · Data Management (DM) – the development, execution and supervision of plans, -
Best Practices in Data Collection and Preparation: Recommendations For
Feature Topic on Reviewer Resources Organizational Research Methods 2021, Vol. 24(4) 678–\693 ª The Author(s) 2019 Best Practices in Data Article reuse guidelines: sagepub.com/journals-permissions Collection and Preparation: DOI: 10.1177/1094428119836485 journals.sagepub.com/home/orm Recommendations for Reviewers, Editors, and Authors Herman Aguinis1 , N. Sharon Hill1, and James R. Bailey1 Abstract We offer best-practice recommendations for journal reviewers, editors, and authors regarding data collection and preparation. Our recommendations are applicable to research adopting dif- ferent epistemological and ontological perspectives—including both quantitative and qualitative approaches—as well as research addressing micro (i.e., individuals, teams) and macro (i.e., organizations, industries) levels of analysis. Our recommendations regarding data collection address (a) type of research design, (b) control variables, (c) sampling procedures, and (d) missing data management. Our recommendations regarding data preparation address (e) outlier man- agement, (f) use of corrections for statistical and methodological artifacts, and (g) data trans- formations. Our recommendations address best practices as well as transparency issues. The formal implementation of our recommendations in the manuscript review process will likely motivate authors to increase transparency because failure to disclose necessary information may lead to a manuscript rejection decision. Also, reviewers can use our recommendations for developmental purposes to highlight which particular issues should be improved in a revised version of a manuscript and in future research. Taken together, the implementation of our rec- ommendations in the form of checklists can help address current challenges regarding results and inferential reproducibility as well as enhance the credibility, trustworthiness, and usefulness of the scholarly knowledge that is produced. -
The Risks of Using Spreadsheets for Statistical Analysis Why Spreadsheets Have Their Limits, and What You Can Do to Avoid Them
The risks of using spreadsheets for statistical analysis Why spreadsheets have their limits, and what you can do to avoid them Let’s go Introduction Introduction Spreadsheets are widely used for statistical analysis; and while they are incredibly useful tools, they are Why spreadsheets are popular useful only to a certain point. When used for a task 88% of all spreadsheets they’re not designed to perform, or for a task at contain at least one error or beyond the limit of their capabilities, spread- sheets can be somewhat risky. An alternative to spreadsheets This paper presents some points you should consider if you use, or plan to use, a spread- sheet to perform statistical analysis. It also describes an alternative that in many cases will be more suitable. The learning curve with IBM SPSS Statistics Software licensing the SPSS way Conclusion Introduction Why spreadsheets are popular Why spreadsheets are popular A spreadsheet is an attractive choice for performing The answer to the first question depends on the scale and calculations because it’s easy to use. Most of us know (or the complexity of your data analysis. A typical spreadsheet 1 • 2 • 3 • 4 • 5 think we know) how to use one. Plus, spreadsheet programs will have a restriction on the number of records it can 6 • 7 • 8 • 9 come as a standard desktop computer resource, so they’re handle, so if the scale of the job is large, a tool other than a already available. spreadsheet may be very useful. A spreadsheet is a wonderful invention and an An alternative to spreadsheets excellent tool—for certain jobs. -
Research Data Management Best Practices
Research Data Management Best Practices Introduction ............................................................................................................................................................................ 2 Planning & Data Management Plans ...................................................................................................................................... 3 Naming and Organizing Your Files .......................................................................................................................................... 6 Choosing File Formats ............................................................................................................................................................. 9 Working with Tabular Data ................................................................................................................................................... 10 Describing Your Data: Data Dictionaries ............................................................................................................................... 12 Describing Your Project: Citation Metadata ......................................................................................................................... 15 Preparing for Storage and Preservation ............................................................................................................................... 17 Choosing a Repository ......................................................................................................................................................... -
Data Migration (Pdf)
PTS Data Migration 1 Contents 2 Background ..................................................................................................................................... 2 3 Challenge ......................................................................................................................................... 3 3.1 Legacy Data Extraction ............................................................................................................ 3 3.2 Data Cleansing......................................................................................................................... 3 3.3 Data Linking ............................................................................................................................. 3 3.4 Data Mapping .......................................................................................................................... 3 3.5 New Data Preparation & Load ................................................................................................ 3 3.6 Legacy Data Retention ............................................................................................................ 4 4 Solution ........................................................................................................................................... 5 4.1 Legacy Data Extraction ............................................................................................................ 5 4.2 Data Cleansing........................................................................................................................ -
Research Data Management: Sharing and Storage
Research Data Management: Strategies for Data Sharing and Storage 1 Research Data Management Services @ MIT Libraries • Workshops • Web guide: http://libraries.mit.edu/data-management • Individual assistance/consultations – includes assistance with creating data management plans 2 Why Share and Archive Your Data? ● Funder requirements ● Publication requirements ● Research credit ● Reproducibility, transparency, and credibility ● Increasing collaborations, enabling future discoveries 3 Research Data: Common Types by Discipline General Social Sciences Hard Sciences • images • survey responses • measurements generated by sensors/laboratory • video • focus group and individual instruments interviews • mapping/GIS data • computer modeling • economic indicators • numerical measurements • simulations • demographics • observations and/or field • opinion polling studies • specimen 4 5 Research Data: Stages Raw Data raw txt file produced by an instrument Processed Data data with Z-scores calculated Analyzed Data rendered computational analysis Finalized/Published Data polished figures appear in Cell 6 Setting Up for Reuse: ● Formats ● Versioning ● Metadata 7 Formats: Considerations for Long-term Access to Data In the best case, your data formats are both: • Non-proprietary (also known as open), and • Unencrypted and uncompressed 8 Formats: Considerations for Long-term Access to Data In the best case, your data files are both: • Non-proprietary (also known as open), and • Unencrypted and uncompressed 9 Formats: Preferred Examples Proprietary Format -
Data Management, Analysis Tools, and Analysis Mechanics
Chapter 2 Data Management, Analysis Tools, and Analysis Mechanics This chapter explores different tools and techniques for handling data for research purposes. This chapter assumes that a research problem statement has been formulated, research hypotheses have been stated, data collection planning has been conducted, and data have been collected from various sources (see Volume I for information and details on these phases of research). This chapter discusses how to combine and manage data streams, and how to use data management tools to produce analytical results that are error free and reproducible, once useful data have been obtained to accomplish the overall research goals and objectives. Purpose of Data Management Proper data handling and management is crucial to the success and reproducibility of a statistical analysis. Selection of the appropriate tools and efficient use of these tools can save the researcher numerous hours, and allow other researchers to leverage the products of their work. In addition, as the size of databases in transportation continue to grow, it is becoming increasingly important to invest resources into the management of these data. There are a number of ancillary steps that need to be performed both before and after statistical analysis of data. For example, a database composed of different data streams needs to be matched and integrated into a single database for analysis. In addition, in some cases data must be transformed into the preferred electronic format for a variety of statistical packages. Sometimes, data obtained from “the field” must be cleaned and debugged for input and measurement errors, and reformatted. The following sections discuss considerations for developing an overall data collection, handling, and management plan, and tools necessary for successful implementation of that plan. -
Advanced Data Preparation for Individuals & Teams
WRANGLER PRO Advanced Data Preparation for Individuals & Teams Assess & Refine Data Faster FILES DATA VISUALIZATION Data preparation presents the biggest opportunity for organizations to uncover not only new levels of efciency but DATABASES REPORTING also new sources of value. CLOUD MACHINE LEARNING Wrangler Pro accelerates data preparation by making the process more intuitive and efcient. The Wrangler Pro edition API INPUTS DATA SCIENCE is specifically tailored to the needs of analyst teams and departmental use cases. It provides analysts the ability to connect to a broad range of data sources, schedule workflows to run on a regular basis and freely share their work with colleagues. Key Benefits Work with Any Data: Users can prepare any type of data, regardless of shape or size, so that it can be incorporated into their organization’s analytics eforts. Improve Efciency: Make the end-to-end process of data preparation up to 10X more efcient compared to traditional methods using excel or hand-code. By utilizing the latest techniques in data visualization and machine learning, Wrangler Pro visibly surfaces data quality issues and guides users through the process of preparing their data. Accelerate Data Onboarding: Whether developing analysis for internal consumption or analysis to be consumed by an end customer, Wrangler Pro enables analysts to more efciently incorporate unfamiliar external data into their project. Users are able to visually explore, clean and join together new data Reduce data Improve data sources in a repeatable workflow to improve the efciency and preparation time quality and quality of their work. by up to 90% trust in analysis WRANGLER PRO Why Wrangler Pro? Ease of Deployment: Wrangler Pro utilizes a flexible cloud- based deployment that integrates with leading cloud providers “We invested in Trifacta to more efciently such as Amazon Web Services. -
Preparation for Data Migration to S4/Hana
PREPARATION FOR DATA MIGRATION TO S4/HANA JONO LEENSTRA 3 r d A p r i l 2 0 1 9 Agenda • Why prepare data - why now? • Six steps to S4/HANA • S4/HANA Readiness Assessment • Prepare for your S4/HANA Migration • Tips and Tricks from the trade • Summary ‘’Data migration is often not highlighted as a key workstream for SAP S/4HANA projects’’ WHY PREPARE DATA – WHY NOW? Why Prepare data - why now? • The business case for data quality is always divided into either: – Statutory requirements – e.g., Data Protection Laws, Finance Laws, POPI – Financial gain – e.g. • Fixing broken/sub optimal business processes that cost money • Reducing data fixes that cost time and money • Sub optimal data lifecycle management causing larger than required data sets, i.e., hardware and storage costs • Data Governance is key for Digital Transformation • IoT • Big Data • Machine Learning • Mobility • Supplier Networks • Employee Engagement • In summary, for the kind of investment that you are making in SAP, get your housekeeping in order Would you move your dirt with you? Get Clean – Data Migration Keep Clean – SAP Tools Data Quality takes time and effort • Data migration with data clean-up and data governance post go-live is key by focussing on the following: – Obsolete Data – Data quality – Master data management (for post go-live) • Start Early – SAP S/4 HANA requires all customers and vendors to be maintained as a business partner – Consolidation and de-duplication of master data – Data cleansing effort (source vs target) – Data volumes: you can only do so much