Returns helpful text about the different subcommands.
CLUSTER
HELP
The CLUSTER HELP command returns a helpful text
describing the different subcommands.
Array reply: a list of subcommands and their descriptions.
O(1)
@slow
ASKING, CLUSTER, CLUSTER ADDSLOTS, CLUSTER ADDSLOTSRANGE, CLUSTER BUMPEPOCH, CLUSTER CANCELSLOTMIGRATIONS, CLUSTER COUNT-FAILURE-REPORTS, CLUSTER COUNTKEYSINSLOT, CLUSTER DELSLOTS, CLUSTER DELSLOTSRANGE, CLUSTER FAILOVER, CLUSTER FLUSHSLOTS, CLUSTER FORGET, CLUSTER GETKEYSINSLOT, CLUSTER GETSLOTMIGRATIONS, CLUSTER INFO, CLUSTER KEYSLOT, CLUSTER LINKS, CLUSTER MEET, CLUSTER MIGRATESLOTS, CLUSTER MYID, CLUSTER MYSHARDID, CLUSTER NODES, CLUSTER REPLICAS, CLUSTER REPLICATE, CLUSTER RESET, CLUSTER SAVECONFIG, CLUSTER SET-CONFIG-EPOCH, CLUSTER SETSLOT, CLUSTER SHARDS, CLUSTER SLOT-STATS, CLUSTER SLOTS, CLUSTER SYNCSLOTS, READONLY, READWRITE.