Have you heard of Redis? Remote Dictionary Server is an open source. Come on, find out more about Redis through the following article.
What is Redis Database?
NoSQL database an open source under the BSD license. Redis is an in-memory data structure storage technology that functions for in-memory data structure storage that functions as a database, cache, cache management , message broker, and thread.
Redis can be used in various programming languages and can be used on top of replication, Lua scripts, LRU eviction and provides high availability , as well as ease of system automation.
structures such as strings, sets, hashes (dictionaries), lists, and sorted sets data. Redis is database for rapid development and applications. This is because the core data structure is easily shared between processes and services.
Redis eliminates the need for disk access and avoids search time delays. This is because redis works in memory, unlike databases where data is stored on a hard disk or SSD.
is used as a cache to store frequently accessed data in memory so that the application is responsive to the user. Redis can deliver frequently requested items in under a millisecond.
- Real-Time Analytics
database can be used as an in-memory data store to retrieve, process and analyze data real-time in under one millisecond.
- Data Eviction
Redis data structures marked with Time To Live (TTL) are installed in seconds, then deleted. Configurable Eviction Policies are available in database .
Advantages of Redis
- ‘s main memory server. So redis performance is faster, less than a millisecond.
- Redis supports all programming languages, including Python, PHP, C, C++, C3, Ruby R, and more.
- Various data structures, such as strings, lists, sets, hashes, bitmaps. HyperLogLog, streams, and Geospatial Indexes.
- Redis is versatile, can be used for caching, message queuing.
Redis Data Types
As mentioned earlier, Redis supports a variety of structure data types. Keys in Redis are binary-safe strings, with a maximum size of 512 MB. Let’s discuss the data types supported in values.
String in Redis is a sequence of bytes. They are safety binaries, so they have a known length that is not defined by any ending character. You can store up to 512 megabytes in a Redis string. Strings can store any type of data, such as text, integers, floats, videos, images, or audio files.
In Redis, a List is a list of strings sorted by insertion order, so that the elements are stored in a linked list. You can add elements to the head or tail. If we need to insert elements in a list with 500 records, then that number will take the same time as adding elements to a list of 50,000 records.
A set in Redis is an unordered collection of strings. This value type is similar to List, but sets do not allow duplicates, and elements are not ordered in any order. You can add or remove members in O(1)O(1) time complexity.
Sets are useful when we want to store data whose uniqueness is important. For example, storing the number of unique visitors to a website.
4. Sorted Set
We can sort elements by value type Sorted Set. Each element will be associated with a number, which we call a score. This will also determine the order. For example, if we have a key called ‘vegetables’, and we want to store ‘carrots’ and ‘celery’ as values. Carrot’s score is 10, and celery’s is 15. Carrots will come first, followed by celery.
In Redis, the hash value type is a field-value pair. They are used to represent objects, but can store multiple elements and are useful for other tasks as well. A hash takes up very little space, so you can store millions of objects in a small hash instance.
Let’s say we want to store information about a student’s grades. The subject can be the key. Grades can be field-grade pairs, with the field being the student’s name and grade being each student’s grade.
That’s an explanation of Redis Database that you can use to create a NoSQL Database based database.