XADD command in Redis is used with streams, a type of data structure that was introduced in Redis 5.0. Streams are designed to hold a list of messages, where each message is a dictionary-like collection of fields and values. The common use case for the
XADD command is to push data to a Redis stream.
Example 1: Adding a single item to a stream.
In this example, we're creating a connection to a local Redis server using the
redis.Redis() function. Then, we define a stream name and a dictionary message. The
xadd method adds the message to the stream and returns the ID of the added message.
Example 2: Adding an item to a stream with a maximum length.
In this second example, we're adding an optional
maxlen parameter which sets a limit to the number of items in the stream. If the limit is reached, older items will be removed.
maxlen, take into account that removing old items can be resource-intensive if a large number of deletions is needed. Consider setting
approximate=Trueto speed up this process.
XADDwithout first establishing a connection to the Redis server. Always ensure your Redis instance is running and accessible.
What is the 'approximate' parameter in the
The 'approximate' parameter, when set to True, allows Redis to remove just enough elements to get close to the
Can I add multiple fields and values in a single
Yes, the message in
xadd is a dictionary and can have multiple field-value pairs.