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Understand the internal architecture of a distributed file system (DFS), including key components like metadata servers, data nodes, replication mechanisms, and a real-world example using Hadoop HDFS.
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Learn what a Distributed File System is, how it works, its key features, examples like HDFS and GFS, and common use cases such as cloud storage and big data processing.- Published on
A Clustered Index controls the physical order of data in a table, making range queries and sorting extremely fast. It organizes rows on disk by the index key and is usually the primary key, with only one clustered index allowed per table.- Published on
A Composite Index combines two or more columns into a single index to speed up queries filtering or sorting by multiple fields. Column order matters, and the index supports queries starting with the leftmost column(s).- Published on
Learn what database indexes are, how they boost query performance, and why they can slow down write operations. Discover how to use indexes wisely to balance speed and efficiency in data retrieval and storage.