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hadoop记录

RDBMS Hadoop Data Types RDBMS relies on the structured data and the schema of the data is always known. Any kind of data can be stored into Hadoop i.e. Be it structured, unstructured or semi-structured. Processing RDBMS provides limited or no processing capabilities. Hadoop allows us to process the data which is distributed across the cluster in a parallel fashion. Schema on Read Vs. Write RDBMS is based on ‘schema on write’ where schema validation is done before loading the data. On the contrary, Hadoop follows the schema on read policy. Read/Write Speed In RDBMS, reads are fast because the schema of the data is already known. The writes are fast in HDFS because no schema validation happens during HDFS write. Cost Licensed software, therefore, I have to pay for the software. Hadoop is an open source framework. So, I don’t need to pay for the software. Best Fit Use Case RDBMS is used for OLTP (Online Trasanctional Processing) system. Hadoop is used for Data discovery, data analytics or OLAP system. RDBMS 与 Hadoop

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hadoop记录 - 乐享诚美

RDBMS Hadoop Data Types RDBMS relies on the structured data and the schema of the data is always known. Any kind of data can be stored into Hadoop i.e. Be it structured, unstructured or semi-structured. Processing RDBMS provides limited or no processing capabilities. Hadoop allows us to process the data which is distributed across the cluster in a parallel fashion. Schema on Read Vs. Write RDBMS is based on ‘schema on write’ where schema validation is done before loading the data. On the contrary, Hadoop follows the schema on read policy. Read/Write Speed In RDBMS, reads are fast because the schema of the data is already known. The writes are fast in HDFS because no schema validation happens during HDFS write. Cost Licensed software, therefore, I have to pay for the software. Hadoop is an open source framework. So, I don’t need to pay for the software. Best Fit Use Case RDBMS is used for OLTP (Online Trasanctional Processing) system. Hadoop is used for Data discovery, data analytics or OLAP system. RDBMS 与 Hadoop

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【docker】入门

Docker 是一个用于开发、交付和运行应用程序的开放平台。 Docker 使您能够将应用程序与基础架构分开,以便 您可以快速交付软件。使用 Docker,您可以管理您的基础架构 以与管理应用程序相同的方式。通过利用 Docker 的 快速传送、测试和部署代码的方法,您可以 显著减少编写代码和在生产环境中运行代码之间的延迟。 Docker 提供了在松散隔离中打包和运行应用程序的能力 称为容器的环境。隔离和安全性允许您运行许多 容器同时在给定主机上。容器重量轻,包含 运行应用程序所需的一切,因此您无需依赖 当前安装在主机上。您可以在工作时轻松共享容器, 并确保与您共享的每个人都获得在 同样的方式。

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