Spark Hadoop: the essential questions you may need to know
In this series of blogs contain some essential questions about Spark and Hadoop, which are frequently being asked in many interviews. At the same time, those Q&A will help you better understand the big data framework, ecoystem, especially know hot to better apply them
Eco-system Hadoop#
Basic Concept#
How do you know about RedHat, Apache. I know, it is straightforward google-it questions. however
Hadoop ecosystem
HDFS#
- what is the mechanism. Can we change a part of it?
[structure] Namenode, Datanode
namenode containes the metadata, import so, usually it has at least
sequentialized
what is a block? in windows, the block is x KB