The hadoop environment has a same aim – to gather maximum interesting data from different systems, in better way. Using such radical approach, programmers can dump all data of interest into a big data store. This is usually HDFS, cloud storage that is good for the task as it’s cheap and flexible. Also, it puts the data close to a reasonable cloud computing power.
You can still rely on ETL and create a data warehouse using tools, such as Hive. You have all of the raw data available with which you can define new queries and perform complex analyses over all of the raw historical data.
Hadoop toolset empowers users with great flexibility and power of analysis as it performs big computation by splitting a task over range of cheap commodity machines that let you to do tasks in more powerful, speculative way that is not possible in conventional warehouse.
A datawarehouse is a structured relational database that is intended for collecting all the interesting data from multiple systems. You need to clean and structure the warehouse when putting data into it. This structuring and cleaning process is known as ETL. The data warehouse approach is effective as it keeps the data organize and simple. Yet this can get very expensive as enterprise data warehouse are usually built on specialized infrastructure that becomes pricey for large datasets.
Data warehouse is a database built for analysis. It encompasses a wide range of apps today, from large scale advanced analytical data stores to pre built BI apps. Data warehouses are becoming a mainstay of the IT infrastructure as they enabling both long-term strategic planning and agile responses to present market conditions.
Both big data and data warehousing share same goals, i.e. to bring business value through the data analysis. Big data is in several ways an evolution of data warehousing. Many technologies are using Hadoop and NoSQL databases for big data.
Being the largest database in an IT organization, data warehouse can bring distinct data management challenges than usual OLTP database. Various advantages for running such data warehouses online are-
- Read consistency and online operations
- SQL extensions for analytics
- Advanced analytics and more
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