How do I delete everything in Redis

Question

I want to delete all keys  I want everything wiped out and give me a blank database    Is there a way to do this in Redis client

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You can use FLUSHDB  e g  List databases   127 0 0 1 6379 gt  info keyspace   Keyspace   List keys  127 0 0 1 6379 gt  keys    empty list or set    Add one value to a key  127 0 0 1 6379 gt  lpush key1 1  integer  1 127 0 0 1 6379 gt  keys   1   key1  127 0 0 1 6379 gt  info keyspace   Keyspace db0 keys 1 expires 0 avg ttl 0   Create other key with two values  127 0 0 1 6379 gt  lpush key2 1  integer  1 127 0 0 1 6379 gt  lpush key2 2  integer  2 127 0 0 1 6379 gt  keys   1   key1  2   key2  127 0 0 1 6379 gt  info keyspace   Keyspace db0 keys 2 expires 0 avg ttl 0   List all values in key2  127 0 0 1 6379 gt  lrange key2 0 -1 1   2  2   1    Do FLUSHDB  127 0 0 1 6379 gt  flushdb OK   List keys and databases  127 0 0 1 6379 gt  keys    empty list or set  127 0 0 1 6379 gt  info keyspace   Keyspace

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With redis-cli    FLUSHDB     Deletes all keys from the connection s current database  FLUSHALL     Deletes all keys from all databases    For example  in your shell    redis-cli flushall

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After you start the Redis-server using service redis-server start --port 8000 or redis-server   Use redis-cli -p 8000 to connect to the server as a client in a different terminal   You can use either    FLUSHDB - Delete all the keys of the currently selected DB  This command never fails  The time-complexity for this operation is O N   N being the number of keys in the database  FLUSHALL - Delete all the keys of all the existing databases  not just the currently selected one  This command never fails  The time-complexity for this operation is O N   N being the number of keys in all existing databases    Check the documentation for ASYNC option for both   If you are using Redis through its python interface  use these two functions for the same functionality    def flushall self        Delete all keys in all databases on the current host      return self execute command  FLUSHALL     and  def flushdb self        Delete all keys in the current database      return self execute command  FLUSHDB

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Heads up that FLUSHALL may be overkill  FLUSHDB is the one to flush a database only  FLUSHALL will wipe out the entire server   As in every database on the server  Since the question was about flushing a database I think this is an important enough distinction to merit a separate answer

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you can use flushall in your terminal redis-cli gt  flushall

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You can use FLUSHALL which will delete all keys from your every database  Where as FLUSHDB will delete all keys from our current database

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FLUSHALL Deletes all the Keys of All exisiting databases   FOr Redis version   4 0    FLUSHALL ASYNC is  supported  which runs in a background thread wjthout blocking the server https   redis io commands flushall  FLUSHDB - Deletes all the keys in the selected Database    https   redis io commands flushdb  The time complexity to perform the operations will be O N    where  N being the number of keys in the database   The Response from the redis will be a  simple string   OK

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If you re using the redis-rb gem then you can simply call   your redis client flushdb

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redis-cli -h  lt host gt  -p  lt port gt  flushall  It will remove all data from client connected with host and port

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Open redis-cli and type   FLUSHALL

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If you are using Java then from the documentation  you can use any one of them based on your use case           Remove all keys from all databases         return String simple-string-reply     String flushall            Remove all keys asynchronously from all databases         return String simple-string-reply     String flushallAsync            Remove all keys from the current database         return String simple-string-reply     String flushdb            Remove all keys asynchronously from the current database         return String simple-string-reply     String flushdbAsync      Code    RedisAdvancedClusterCommands syncCommands      get sync   or async   commands  syncCommands flushdb      Read more  https   github com lettuce-io lettuce-core wiki Redis-Cluster

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Stop Redis instance  Delete RDB file  Start Redis instance

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There are different approaches  If you want to do this from remote  issue flushall to that instance  through command line tool redis-cli or whatever tools i e  telnet  a programming language SDK  Or just log in that server  kill the process  delete its dump rdb file and appendonly aof backup them before deletion

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This works for me  redis-cli KEYS      xargs --max-procs 16 -L 100 redis-cli DEL It list all Keys in redis  then pass using xargs to redis-cli DEL  using max 100 Keys per command  but running 16 command at time  very fast and useful when there is not FLUSHDB or FLUSHALL due to security reasons  for example when using Redis from Bitnami in Docker or Kubernetes  Also  it doesn t require any additional programming language and it just one line

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Its better if you can have RDM  Redis Desktop Manager   You can connect to your redis server by creating a new connection in RDM   Once its connected you can check the live data  also you can play around with any redis command   Opening a cli in RDM   1  Right click on the connection you will see a console option  just click on it a new console window will open at the bottom of RDM   Coming back to your question FLUSHALL is the command  you can simply type FLUSHALL in the redis cli   Moreover if you want to know about any redis command and its proper usage  go to link below  https   redis io commands

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This method worked for me - delete everything of current connected Database on your Jedis cluster   public static void resetRedis         jedisCluster   RedisManager getJedis       your JedisCluster instance      for  JedisPool pool   jedisCluster getClusterNodes   values               try  Jedis jedis   pool getResource                  jedis flushAll                      catch  Exception ex               System out println ex getMessage

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FLUSHALL  Remove all keys from all databases  FLUSHDB  Remove all keys from the current database  SCRIPT FLUSH  Remove all the scripts from the script cache

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Your questions seems to be about deleting entire keys in a database  In this case you should try    Connect to redis  You can use the command redis-cli  if running on port 6379   else you will have to specify the port number also  Select your database  command select  Index   Execute the command flushdb   If you want to flush keys in all databases  then you should try flushall

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you can use following approach in python  def redis clear cache self        try          redis keys   self redis client keys          except Exception as e            print  redis client keys   raised exception   gt      str e           return 1      try          if len redis keys     0              self redis client delete  redis keys      except Exception as e            print  redis client delete   raised exception   gt      str e           return 1        print  cleared cache       return 0

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Answers so far are absolutely correct  they delete all keys   However  if you also want to delete all Lua scripts from the Redis instance  you should follow it by   SCRIPT FLUSH  The OP asks two questions  this completes the second question  everything wiped

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i think sometimes stop the redis-server and delete rdb aof files  make sure there   s no data can be reloading  then start the redis-server now it s new and empty

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One more option from my side   In our production and pre-production databases there are thousands of keys  Time to time we need to delete some keys  by some mask   modify by some criteria etc  Of course  there is no way to do it manually from CLI  especially having sharding  512 logical dbs in each physical    For this purpose I write java client tool that does all this work  In case of keys deletion the utility can be very simple  only one class there   public class DataCleaner        public static void main String args              String keyPattern   args 0           String host   args 1           int port   Integer valueOf args 2            int dbIndex   Integer valueOf args 3             Jedis jedis   new Jedis host  port            int deletedKeysNumber   0          if dbIndex  gt   0               deletedKeysNumber    deleteDataFromDB jedis  keyPattern  dbIndex             else               int dbSize   Integer valueOf jedis configGet  databases   get 1                for int i   0  i  lt  dbSize  i                     deletedKeysNumber    deleteDataFromDB jedis  keyPattern  i                                    if deletedKeysNumber    0                System out println  There is no keys with key pattern      keyPattern     was found in database with host      host                        private static int deleteDataFromDB Jedis jedis  String keyPattern  int dbIndex            jedis select dbIndex           Set lt String gt  keys   jedis keys keyPattern           for String key   keys               jedis del key               System out println  The key      key     has been deleted from database index      dbIndex                      return keys size               Writing such kind of tools I find very easy and spend no more then 5-10 min

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Use FLUSHALL ASYNC if using  Redis 4 0 0 or greater  else FLUSHALL   https   redis io commands flushall  Note  Everything before executing FLUSHALL ASYNC will be evicted  The changes made during executing FLUSHALL ASYNC will remain unaffected

[redis] How do I delete everything in Redis?

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