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Implemented commands
====================
This will describe all changes that RedisCluster have done to make a command to work in a cluster environment.
If a command is not listed here then the default implementation from `Redis` in the `redis-py` library is used.
Fanout Commands
---------------
The following commands will send the same request to all nodes in the cluster. Results is returned as a dict with k,v pair (NodeID, Result).
- bgrewriteaof
- bgsave
- client_getname
- client_kill
- client_list
- client_setname
- config_get
- config_resetstat
- config_rewrite
- config_set
- dbsize
- echo
- info
- lastsave
- ping
- save
- slowlog_get
- slowlog_len
- slowlog_reset
- time
The pubsub commands are sent to all nodes, and the resulting replies are merged together. They have an optional keyword argument `aggregate` which when set to `False` will return a dict with k,v pair (NodeID, Result) instead of the merged result.
- pubsub_channels
- pubsub_numsub
- pubsub_numpat
This command will send the same request to all nodes in the cluster in sequence. Results is appended to a unified list.
- keys
The following commands will only be send to the master nodes in the cluster. Results is returned as a dict with k,v pair (NodeID, Command-Result).
- flushall
- flushdb
- scan
This command will sent to a random node in the cluster.
- publish
The following commands will be sent to the server that matches the first key.
- eval
- evalsha
This following commands will be sent to the master nodes in the cluster.
- script load - the result is the hash of loaded script
- script flush - the result is `True` if the command succeeds on all master nodes, else `False`
- script exists - the result is an array of booleans. An entry is `True` only if the script exists on all the master nodes.
The following commands will be sent to the sever that matches the specefied key.
- hscan
- hscan_iter
- scan_iter
- sscan
- sscan_iter
- zscan
- zscan_iter
Blocked commands
----------------
The following commands is blocked from use.
Either because they do not work, there is no working implementation or it is not good to use them within a cluster.
- bitop - Currently to hard to implement a solution in python space
- client_setname - Not yet implemented
- move - It is not possible to move a key from one db to another in cluster mode
- restore
- script_kill - Not yet implemented
- sentinel
- sentinel_get_master_addr_by_name
- sentinel_master
- sentinel_masters
- sentinel_monitor
- sentinel_remove
- sentinel_sentinels
- sentinel_set
- sentinel_slaves
- shutdown
- slaveof - Cluster management should be done via redis-trib.rb manually
- unwatch - Not yet implemented
- watch - Not yet implemented
Overridden methods
------------------
The following methods is overridden from Redis with a custom implementation.
They can operate on keys that exists in different hashslots and require a client side implementation to work.
- brpoplpus
- mget
- mset
- msetnx
- pfmerge
- randomkey
- rename
- renamenx
- rpoplpush
- sdiff
- sdiffstore
- sinter
- sinterstore
- smove
- sort
- sunion
- sunionstore
- zinterstore
- zunionstore
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