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Redis ™ VS Apache ZooKeeper

Compare Redis VS Apache ZooKeeper and see what are their differences

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  3. » Reviews
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Redis logo Redis

Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

Apache ZooKeeper logo Apache ZooKeeper

Apache ZooKeeper is an effort to develop and maintain an open-source server which enables highly reliable distributed coordination.
  • Redis Landing page
    Landing page //
    2022-10-19

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams. Redis has built-in replication, Lua scripting, LRU eviction, transactions and different levels of on-disk persistence, and provides high availability via Redis Sentinel and automatic partitioning with Redis Cluster.

  • Apache ZooKeeper Landing page
    Landing page //
    2021-09-21

Redis features and specs

  • Performance
    Redis is an in-memory data store, which allows it to provide extremely fast read and write operations. This makes it ideal for applications requiring real-time interactions.
  • Data Structures
    Redis offers a variety of data structures, such as strings, hashes, lists, sets, and sorted sets. This flexibility helps developers manage data more efficiently in different scenarios.
  • Scalability
    Redis supports horizontal scalability with features like clustering and partitioning, allowing for easy scaling as your application grows.
  • Persistence
    Though primarily an in-memory store, Redis provides options for data persistence, such as RDB snapshots and AOF logs, enabling data durability across reboots.
  • Pub/Sub Messaging
    Redis includes a built-in publish/subscribe messaging system, which can be used to implement real-time messaging and notifications.
  • Simple API
    Redis has a simple and intuitive API, which can speed up development time and make it easier to integrate Redis into various application stacks.
  • Atomic Operations
    Redis supports atomic operations on data structures, reducing the complexity of concurrent programming and making it easier to maintain data consistency.

Possible disadvantages of Redis

  • Memory Usage
    Being an in-memory data store, Redis can become expensive in terms of memory usage, especially when working with large datasets.
  • Data Persistence Limitations
    While Redis offers data persistence, it is not as robust as traditional databases. There can be data loss in certain configurations, such as when using asynchronous persistence methods.
  • Complexity in Scaling
    Although Redis supports clustering, setting up and managing a Redis cluster can be complex and may require significant DevOps expertise.
  • Single-threaded Nature
    Redis operates on a single-threaded event loop, which can become a bottleneck for certain workloads that could benefit from multi-threading.
  • Limited Query Capabilities
    Compared to traditional relational databases, Redis offers limited querying capabilities. Complex queries and joins are not supported natively.
  • License
    As of Redis 6 and higher, the Redis modules are under the Server Side Public License (SSPL), which may be restrictive for some use cases compared to more permissive open-source licenses.

Apache ZooKeeper features and specs

  • High Availability
    ZooKeeper is designed to be highly available, with built-in redundancy and failover mechanisms that ensure minimal downtime.
  • Consistency
    It follows a strict consistency model, ensuring that reads reflect the most recent writes, which is crucial for coordination and configuration management.
  • Scalability
    ZooKeeper can handle a high number of read operations and can be scaled horizontally by adding more nodes to the ensemble.
  • Leader Election
    ZooKeeper simplifies the implementation of leader election processes, making it easier to design fault-tolerant distributed systems.
  • Cluster Management
    It aids in cluster management by providing mechanisms to track the status and configuration of nodes across a distributed system.
  • Watch Mechanism
    ZooKeeper provides a watch mechanism that allows clients to be notified of data changes, helping to keep state synchronized across systems.

Possible disadvantages of Apache ZooKeeper

  • Complexity
    Setting up and managing a ZooKeeper ensemble can be complex, requiring careful configuration and maintenance.
  • Resource Intensive
    ZooKeeper can be resource-intensive, requiring significant memory and CPU, especially in large deployments.
  • Write Performance
    While read operations are very fast, write operations can be slower due to the need to achieve consensus among ZooKeeper nodes.
  • Operational Overhead
    Managing ZooKeeper involves operational overhead, including monitoring, backups, and handling node failures.
  • Limited Programming Language Support
    Although ZooKeeper supports many major languages, the client libraries for some languages may not be as mature or well-supported as those for others.
  • Transaction Size
    ZooKeeper is not designed for very large data or complex transactions, limiting its use cases to lightweight coordination tasks.

Redis videos

+ Add

Improve your Redis developer experience with RedisInsight, Redis Labs

More videos:

  • Review - What is Redis? | Why and When to use Redis? | Tech Primers
  • Review - Redis Enterprise Overview with Yiftach Shoolman - Redis Labs
  • Review - Redis Labs "Why NoSQL is a Safe Bet"
  • Review - Redis system design | Distributed cache System design
  • Review - What is Redis and What Does It Do?
  • Review - Redis Sorted Sets Explained

Apache ZooKeeper videos

+ Add

Why do we use Apache Zookeeper?

More videos:

  • Review - 4.5. Apache Zookeeper | Hands-On - Getting Started

Category Popularity

0-100% (relative to Redis and Apache ZooKeeper)

Redis

Apache ZooKeeper

Databases
100 100%
Databases
0% 0
Web And Application Servers
0 0%
Web And Application Servers
100% 100
NoSQL Databases
100 100%
NoSQL Databases
0% 0
Web Servers
0 0%
Web Servers
100% 100

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Redis and Apache ZooKeeper

Redis Reviews

Redis Alternative for App Performance | Gigaspaces
Redis offers a RESTful API for accessing data stored within its in-memory technology data structures. This API provides a simple and efficient way to interact with Redis, enabling developers to leverage its capabilities seamlessly in their applications. Developers also need to manage the Redis cached data lifecycle, it’s the application responsibility to store the data &...
Source: www.gigaspaces.com
Are Free, Open-Source Message Queues Right For You?
A notable challenge with Redis Streams is that it doesn't natively support distributed, horizontal scaling. Also, while Redis is famous for its speed and simplicity, managing and scaling a Redis installation may be complex for some users, particularly for persistent data workloads.
Source: blog.iron.io
Redis vs. KeyDB vs. Dragonfly vs. Skytable | Hacker News
1. Redis: I'll start with Redis which I'd like to call the "original" key/value store (after memcached) because it is the oldest and most widely used of all. Being a long-time follower of Redis, I do know it's single-threaded (and uses io-threads since 6.0) and hence it achieves lesser throughput than the other stores listed above which are multi-threaded, at least to some...
Source: news.ycombinator.com
Memcached vs Redis - More Different Than You Would Expect
Remember when I wrote about how Redis was using malloc to assign memory? I lied. While Redis did use malloc at some point, these days Redis actually uses jemalloc. The reason for this is that jemalloc, while having lower peak performance has lower memory fragmentation helping to solve the framented memory issues that Redis experiences.
Source: engineering.kablamo.com.au
Top 15 Kafka Alternatives Popular In 2021
Redis is a known, open-source, in-memory data structure store that offers different data structures like lists, strings, hashes, sets, bitmaps, streams, geospatial indexes, etc. It is best utilized as a cache, memory broker, and cache. It has optional durability and inbuilt replication potential. It offers a great deal of availability through Redis Sentinel and Redis Cluster.
Source: www.spec-india.com

Apache ZooKeeper Reviews

We have no reviews of Apache ZooKeeper yet.
Be the first one to post

Social recommendations and mentions

Based on our record, Redis should be more popular than Apache ZooKeeper. It has been mentiond 217 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Redis mentions (217)

  • Feature Comparison: Reliable Queue vs. Valkey and Redis Stream
    Valkey and Redis streams are data structures that act like append-only logs with some added features. Redisson PRO, the Valkey and Redis client for Java developers, improves on this concept with its Reliable Queue feature. - Source: dev.to / 4 days ago
  • Finding Bigfoot with Async Generators + TypeScript
    Of course, these examples are just toys. A more proper use for asynchronous generators is handling things like reading files, accessing network services, and calling slow running things like AI models. So, I'm going to use an asynchronous generator to access a networked service. That service is Redis and we'll be using Node Redis and Redis Query Engine to find Bigfoot. - Source: dev.to / 18 days ago
  • Caching Isn’t Always the Answer – And Here’s Why
    Slap on some Redis, sprinkle in a few set() calls, and boom—10x faster responses. - Source: dev.to / 18 days ago
  • RisingWave Turns Four: Our Journey Beyond Democratizing Stream Processing
    Real-time serving: Many push processed data into low-latency serving layers like Redis to power applications needing instant responses (think fraud detection, live recommendations, financial dashboards). - Source: dev.to / about 1 month ago
  • Setup a Redis Cluster using Redis Stack
    Redis® Cluster is a fully distributed implementation with automated sharding capabilities (horizontal scaling capabilities), designed for high performance and linear scaling up to 1000 nodes. . - Source: dev.to / about 2 months ago
View more

Apache ZooKeeper mentions (32)

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What are some alternatives?

When comparing Redis and Apache ZooKeeper, you can also consider the following products

MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.

Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies

ArangoDB - A distributed open-source database with a flexible data model for documents, graphs, and key-values.

Microsoft IIS - Internet Information Services is a web server for Microsoft Windows

Apache Cassandra - The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance.

LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.

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