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Redis SUBSCRIBE – How to subscribe to multiple channels in redis pub/sub

5 years ago Lalit Bhagtani 0

In this tutorial, we will learn about how to subscribe to multiple channels in redis message broker system using redis-cli. SUBSCRIBE Command The SUBSCRIBE command is used to subscribe the client to one or more specified channels in redis message broker system. Once the client executes the subscribe command, it enters the subscribed state where Read More

REDIS ( REmote DIrectory Server ) – Redis Tutorial

5 years ago Lalit Bhagtani 0

Redis is a open source ( BSD licensed ), NoSQL database. It is an In-Memory Database, based on the concept of Key-Value Store. Redis is also referred as a Data Structure Store. Lets understand each and every term one by one :- Key-Value Datastore :- It is a data storage paradigm, where data is stored Read More

Redis Hash – Commands to manage a hash value in redis datastore

5 years ago Lalit Bhagtani 0

Hash is a map of field-value pair, which can be used to represent object type like java object. In Redis, hash can be store as a value at key and various redis commands are used to store, manage and retrieved a hash value stored in redis database. The syntax for using redis commands is as Read More

Redis HSET | HSETNX | HMSET – How to set a value to the field in the hash value in redis

5 years ago Lalit Bhagtani 0

In this tutorial, we will learn about how to set a value to its respective field in the hash value stored at a key, For this, we will use Redis HSET, HSETNX, and HMSET commands. HSET Command This command is used to set the specified value to its respective field in the hash stored at Read More

Redis HGETALL – How to get all field/value pairs contained in hash value

5 years ago Lalit Bhagtani 0

In this tutorial, we will learn about how to get all the field/value pairs contained in the hash value stored at a key. For this, we will use Redis HGETALL command. HGETALL Command This command returns all the fields and its associated values contained in the hash value stored at a key. An empty list Read More

How to get a value of the field contained in hash – Redis HGET | HMGET

5 years ago Lalit Bhagtani 0

In this tutorial, we will learn about how to get the value associated with a field contained in the hash value stored at a key. For this, we will use Redis HGET and HMGET command. HGET Command This command is used to get the value associated with a specified field contained inside the hash value Read More

Redis HSTRLEN – How to get a length of the field value contained in hash

5 years ago Lalit Bhagtani 0

In this tutorial, we will learn about how to get a length of the field’s value contained in the hash value stored at a key. For this, we will use Redis HSTRLEN command. HSTRLEN Command This command returns the length ( number of characters ) of a value associated with the field in the hash value Read More

Redis HVALS – How to get all the values contained in hash value

5 years ago Lalit Bhagtani 0

In this tutorial, we will learn about how to get all the values contained in the hash value stored at a key. For this, we will use Redis HVALS commands. HVALS Command This command returns values of all the field contained in the hash value stored at a specified key. An empty list is returned, if Read More

Redis HKEYS – How to get names of all the fields contained in hash value

5 years ago Lalit Bhagtani 0

In this tutorial, we will learn about how to get the names of all fields contained in the hash value stored at a key, by using a COMMAND – HKEYS in redis-cli. Empty list is returned, if key does not exist and error is returned, if key exist but value stored at the key is not of hash Read More

Redis HINCRBYFLOAT – How to increment a floating point number stored at field in hash value

5 years ago Lalit Bhagtani 0

In this tutorial, we will learn about how to increment the floating point number stored at a field inside the hash value stored at key in redis datastore. For this we will use a COMMAND – HINCRBYFLOAT in redis-cli.  This command is used to increment the floating point number stored at a specified field in the hash Read More