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Redis vs Tarantool: What are the differences?
Introduction
Redis and Tarantool are both in-memory data storage systems that are widely used in web applications. While they share some similarities, they also have distinct differences that make them suitable for different use cases. Below, we highlight the key differences between Redis and Tarantool.
Data Model: Redis is a key-value store, where data is stored as simple key-value pairs. It supports a wide range of data structures, such as strings, lists, sets, and hashes, providing flexibility in data manipulation. On the other hand, Tarantool is a NoSQL database that supports multiple data models, including key-value, document, and relational. This allows Tarantool to handle complex data structures and relationships more efficiently.
Replication: Redis supports single-master, multiple-slave replication, where data is asynchronously replicated from the primary server to the secondary servers. This provides high availability but might have some data loss in case of failures. In contrast, Tarantool has synchronous master-slave replication, ensuring that all writes are replicated to the replicas before they are considered successful. This guarantees data consistency but might introduce some latency.
Programming Languages: Redis supports various client libraries, making it compatible with a wide range of programming languages, including but not limited to Python, Java, Ruby, and Node.js. Tarantool, on the other hand, has its own programming language called Lua, which is used to manipulate and query data. While it also provides support for other languages like Python and C++, it is primarily designed to work with Lua.
Durability: Redis does not guarantee durability by default since it primarily stores data in memory. However, it provides options to persist data on disk through logging or snapshots. Tarantool, on the other hand, ensures durability by writing all the changes to disk before considering them committed. This makes it suitable for applications where data persistence is critical.
Concurrency Control: Redis supports single-threaded execution and relies on multiple isolated instances and replication for concurrency. On the other hand, Tarantool is a multi-threaded system that supports concurrent execution of transactions and provides built-in ACID (Atomicity, Consistency, Isolation, Durability) guarantees. This makes Tarantool better suited for applications with high concurrency and strong consistency requirements.
Store Procedures and Triggers: Tarantool supports stored procedures and triggers, allowing developers to define and execute custom scripts directly on the server-side. This provides more flexibility in data manipulation and allows for complex business logic to be executed within the database itself. Redis, on the other hand, does not have built-in support for stored procedures and triggers, relying on client-side logic for data manipulation.
In Summary, Redis is a flexible key-value store with support for various data structures and programming languages, while Tarantool is a versatile NoSQL database with advanced features like multiple data models, synchronous replication, and stored procedures. The choice between Redis and Tarantool depends on the specific requirements of the application in terms of data complexity, data persistence, concurrency, and business logic execution.
Pros of Redis
- Performance886
- Super fast542
- Ease of use513
- In-memory cache444
- Advanced key-value cache324
- Open source194
- Easy to deploy182
- Stable164
- Free155
- Fast121
- High-Performance42
- High Availability40
- Data Structures35
- Very Scalable32
- Replication24
- Great community22
- Pub/Sub22
- "NoSQL" key-value data store19
- Hashes16
- Sets13
- Sorted Sets11
- NoSQL10
- Lists10
- Async replication9
- BSD licensed9
- Bitmaps8
- Integrates super easy with Sidekiq for Rails background8
- Keys with a limited time-to-live7
- Open Source7
- Lua scripting6
- Strings6
- Awesomeness for Free5
- Hyperloglogs5
- Transactions4
- Outstanding performance4
- Runs server side LUA4
- LRU eviction of keys4
- Feature Rich4
- Written in ANSI C4
- Networked4
- Data structure server3
- Performance & ease of use3
- Dont save data if no subscribers are found2
- Automatic failover2
- Easy to use2
- Temporarily kept on disk2
- Scalable2
- Existing Laravel Integration2
- Channels concept2
- Object [key/value] size each 500 MB2
- Simple2
Pros of Tarantool
- Performance3
- Super fast2
- Open source2
- Advanced key-value cache1
- In-memory cache1
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Cons of Redis
- Cannot query objects directly15
- No secondary indexes for non-numeric data types3
- No WAL1