YEDIS API reference

Introduction

The YEDIS API provides a clustered, auto-sharded, globally distributed and persistent key-value API that is compatible with the Redis commands library. A Redis client can connect, send requests, and receive results from YugabyteDB.

Data types

The following data types can be read and written via the YEDIS API.

Data type	Development status
String	Supported
Hash	Supported
Set	Supported
Sorted set	Supported
List	Not yet supported
Bitmaps	Not yet supported
HyperLogLogs	Not yet supported
GeoSpatial	Not yet supported
Time series	New data type in YugabyteDB

Commands

Redis-cli or any Redis applications can access YugabyteDB using the YEDIS API. The following Redis commands are accepted.

Command	Description
<b>String data type </b>
APPEND	Append data to end of string
DEL	Delete keys from a database
EXISTS	Check if the keys are present
EXPIRE	Set key timeout in seconds
EXPIREAT	Set key timeout as timestamp
SET	Write or overwrite a string value
SETEX	Write or overwrite a string value and set TTL in seconds
PSETEX	Write or overwrite a string value and set TTL in milliseconds
SETRANGE	Write a subsection of a string
GET	Read string value
GETRANGE	Read substring
GETSET	Atomically read and write a string
INCR	Increment the value by one
KEYS	Retrieve all keys matching a pattern
PEXPIRE	Set key timeout in milliseconds
PEXPIREAT	Set key timeout as timestamp in milliseconds
PTTL	Get time to live for key in milliseconds
TTL	Get time to live for key in seconds
<b> Hash data type </b>
HDEL	Remove specified entries from a hash
HEXISTS	Check if the subkeys are present in the hash
HGET	Read a field in hash
HGETALL	Read all the contents in a hash
HKEYS	Read all value-keys in a hash
HLEN	Get the number of entries in a hash
HMGET	Read values for the given keys in a hash
HMSET	Write values for the given keys in a hash
HSET	Write one entry in a hash
HSTRLEN	Read the length of a specified entry in a hash
HVALS	Read all values in a hash
<b> Set data type </b>
SADD	Add entries to a set
SCARD	Read the number of entries in a set
SISMEMBER	Check if the members are present in a set
SMEMBERS	Read all members of a set
SREM	Remove members from a set
STRLEN	Read the length of a string
<b> Time series data type </b>
TSADD	Add a time series entry
TSCARD	Retrieve the number of elements in the given time series
TSGET	Retrieve a time series entry
TSLASTN	Retrieve the latest N time series entries for a given time series
TSRANGEBYTIME	Retrieve time series entries for a given time range
TSREM	Delete a time series entry
TSREVRANGEBYTIME	Retrieve time series entries for a given time range ordered from newest to oldest
<b> Sorted set data type </b>
ZADD	Add a sorted set entry
ZCARD	Get cardinality of a sorted set
ZRANGE	Retrieve sorted set entries for given index range
ZRANGEBYSCORE	Retrieve sorted set entries for a given score range
ZREM	Delete a sorted set entry
ZREVRANGE	Retrieve sorted set entries for given index range ordered from highest to lowest score
ZSCORE	Get the score of member at a sorted set key
<b> General </b>
AUTH	Authenticates a client connection to YEDIS API
CONFIG	Not fully supported. Only used to set the required password(s) for YEDIS API
ECHO	Output messages
MONITOR	Debugging tool to see all requests that are processed by a YEDIS API server
ROLE	Read role of a node
RENAME	Rename one key as another
<b> Database </b>
FLUSHALL	Delete all keys from all databases
FLUSHDB	Delete all keys from a database
CREATEDB	Create a new yedis database
LISTDB	List all the yedis databases present
DELETEDB	Delete a yedis database
SELECT	Select the target database to communcate with
<b> Pub-Sub </b>
PUBSUB	Used to query the state of the Pub/Sub system.
PUBLISH	Publishes a message to the specified channel
SUBSCRIBE	Subscribes the client to the specified channel(s)
PSUBSCRIBE	Subscribes the client to the specified pattern(s)
UNSUBSCRIBE	Unubscribes the client from the specified channel(s)
PUNSUBSCRIBE	Unubscribes the client from the specified pattern(s)