What is the difference between redis server, redis-sentinel and redis?

redis-server is the Redis Server itself. redis-sentinel is the Redis Sentinel executable (monitoring and failover). redis-cli is the command line interface utility to talk with Redis. redis-benchmark is used to check Redis performances.
In addition, how does a sentinel work in Redis server?
Simply, application clients connect to the Sentinels and Sentinels provide the latest Redis MASTER address to them. Furthermore, Sentinel is a robust distributed system, where multiple sentinels need to agree to about the fact a given master is no longer available. Then only the failover process starts a select a new MASTER node.
Additionally, how are Redis clients supporting support for Redis? A Redis client supporting Sentinel can automatically discover the address of a Redis master from the master name using Redis Sentinel. So instead of a hard coded IP address and port, a client supporting Sentinel should optionally be able to take as input: A list of ip:port pairs pointing to known Sentinel instances.
And, can a pod of Sentinels monitor a Redis cluster?
A pod of Sentinels can monitor multiple Redis master & slave nodes. Just make sure you don't mix up names, add slaves to the right master and so on. Full documentation for Sentinel. If we go by first commit , then Cluster is even older than Sentinel, dating back to 2011. There's a bit more info in antirez' blog .
Likewise, what is the Quorum value in Redis Sentinel?
The quorum value is the number of Sentinels that need to agree about the fact the master is not reachable. However the quorum is only used to detect the failure. In order to actually perform a failover, one of the Sentinels need to be elected leader for the failover and be authorized to proceed.

20 Similar Question Found

Why is redis so slow with azure redis?

Edit: Checking the SLOWLOG, Redis itself seems to actually hit slowlog with it's 14ms time it takes or so to grab the rows, but this is far from the actual transfer with SSL enabled. We ended up with a premium Redis to have some sort of security between Redis and Web Apps. It worked in my case.

Is there a redis client for stackexchange.redis?

StackExchange.Redis is a pretty good .NET client for Redis. Unfortunately, it can be a little bit tricky to use, and the existing documentation is far from comprehensive. After installing StackExchange.Redis via NuGet, a Redis connection can be obtained via a special ConnectionMultiplexer object.

How does go-redis work with redis go client?

Go-Redis is designed to store and update slot info automatically with a cluster change. The Redis client is designed to control a connection pool for each node, resulting in greater efficiency and reduced latency.

How to use stackexchange.redis with azure redis?

I'm moving all of my existing Azure In-Role cache use to Redis and decided to use the Azure Redis preview along with the StackExchange.Redis library ( https://github.com/StackExchange/StackExchange.Redis ).

How to install stackexchange.redis on redis?

StackExchange.Redis can be installed via the nuget UI (as StackExchange.Redis), or via the nuget package manager console: PM> Install-Package StackExchange.Redis Documentation Basic Usage- getting started and basic usage Configuration- options available when connecting to redis Pipelines and Multiplexers- what is a multiplexer?

When did redis labs change its name to redis enterprise?

By December 2013, the company had at least 10,000 users, including 1,300 paying customers. On January 29, 2014, the company changed its name from Garantia Data to Redis Labs. In September 2014, Redis Labs reported 3,000 paying customers. In early 2015, Redis Labs made available Redis Enterprise Pack.

How to fix stackexchange issues in redis redis?

Loading status checks… Adjust logic to display suggestion for setting AbortOnConnectFail=false only when it's currently true. Mentioned in these issues: #1744 #1287

How are redis clients supporting support for redis?

A Redis client supporting Sentinel can automatically discover the address of a Redis master from the master name using Redis Sentinel. So instead of a hard coded IP address and port, a client supporting Sentinel should optionally be able to take as input: A list of ip:port pairs pointing to known Sentinel instances.

How to use redis with stackexchange.redis?

I am using Redis with StackExchange.Redis. I have multiple threads that will at some point access and edit the value of the same key, so I need to synchronize the manipulation of the data. Looking at the available functions, I see that there are two functions, TakeLock and ReleaseLock.

How to get all keys in redis using php redis?

But following command in shell giving results: How to get KEYS * from redis using phpredis ? There is nothing wrong with your code. You are doing it correctly: $redis->keys ('*') retrieves all the keys. therefore this became the name of the key that you set.

How to use stackexchange.redis for redis cache?

I am using StackExchange.Redis to manage my redis cache: https://github.com/StackExchange/StackExchange.Redis I have made it work, but I am not very confident in the way I implemented it. I could not figure out how to add IDatabase to services.

Is the amazon elasticache for redis compatible with redis?

Amazon ElastiCache for Redis maintains compatibility with the open source Redis data formats, Redis APIs, and works with Redis clients. You can migrate your self-managed Redis workloads to ElastiCache for Redis without any code change. Learn more about open-source Redis »

Do you need redis library to support stackexchange.redis?

The good news is that you don't need anything additional: the same StackExchange.Redis library that is needed to support the Redis IDistributedCache implementation also provides a client you can utilize directly. Here, _redis is an instance of ConnectionMultiplexer.

What is the default redis port for stackexchange.redis?

This will connect to a single server on the local machine using the default redis port (6379). Additional options are simply appended (comma-delimited). Ports are represented with a colon (:) as is usual.

How to run lua script in redis redis?

The string after the EVAL is the Lua script. local val="Hello Compose" return val. So at its simplest you can run Lua scripts. But more importantly, you can run Lua scripts that act like an intelligent transaction. You can handle errors smartly, so instead of just rolling back, you can carry on processing.

Is the redis client based on redis sharp?

Redis Client is based on redis-sharp for the basic communication functions, but it offers some differences. C++ acl-redis Standard C++ Redis Client with high performance and stl-like interface, supporting Redis Cluster, thread safety aedis

Is the redis backplane compatible with stackexchange.redis?

I've got a project that uses SignalR and a RedisBackplane, we've moved from StackExchange.Redis to ServiceStack.Redis due to Redis Sentinel compatibility issues (Not movable) However, it now looks like the support for SignalR Redis Backplane seems to be tied into StackExchange?

What is the difference between redis and redis-raft?

Redis is a popular in-memory data structure server. Historically, Redis has supported a number of ad-hoc replication mechanisms, but none guaranteed stronger than causal consistency. Redis-Raft aims to bring strict serializability to Redis by means of the Raft consensus algorithm.

Which is redis library does stackexchange.redis.extensions use?

Fetching 'Redis' JSON configuration and creating as an instance of type 'StackExchange.Redis.Extensions.Core.Confiugration.ReditConfigurtion'. The 'StackExchange.Redis.Extensions.Core.Abstractions.IRedisCacheClient' provides us Redis context.

How is the algorithm asynchronous in redis redis?

Is the algorithm asynchronous? The algorithm relies on the assumption that while there is no synchronized clock across the processes, still the local time in every process flows approximately at the same rate, with an error which is small compared to the auto-release time of the lock.