Redis HSET is commonly used when you need to store multiple related data points, such as attributes of an object, into a single key in your Redis database. This makes access and manipulation of these related data easier and more efficient, especially in cases where the fields are frequently retrieved together.
We use Jedis, a popular Redis client for Java.
Here's how to use HSET:
In this example, we're creating a hash with the key
user:1 and setting fields (
hsetnxif you want to ensure that a field does not get overwritten if it already exists.
Q: Can I set multiple fields at once?
A: Yes, use the
hmset method to set multiple fields at once. It accepts a Map as an argument.
Q: What if the key already exists? A: If the key already exists, the HSET command will update the value of the field, not the entire hash.