Commands

184 commands

Every verb the server will answer, straight from its own registry — the same table COMMAND DOCS reads. Two columns you will not find in Redis's reference: what the command costs in this engine, and how it differs from Redis.

Commands	Group	Complexity	Redis compatibility	Summary
APPEND	String	O(1) amortised while the value is <= 6…	Compatible	Append bytes to a string value; returns the new length.
DECR	String	O(1)	Compatible	Decrement the integer value of a key by one.
DECRBY	String	O(1)	Compatible	Decrement the integer value of a key by the given amount.
GET	String	O(1)	Compatible	Return the string value of a key.
GETDEL	String	O(1)	Compatible	Return the string value of a key and delete it.
GETSET	String	O(1)	Compatible	Set a key's string value and return its previous value.
INCR	String	O(1)	Compatible	Increment the integer value of a key by one.
INCRBY	String	O(1)	Compatible	Increment the integer value of a key by the given amount.
INCRBYFLOAT	String	O(1)	Differs	Increment the float value of a key by the given amount.
MGET	String	O(N) keys, one O(1) probe each on the…	Differs	Return the values of multiple keys (cross-shard gather).
MSET	String	O(N) pairs, one O(1) SET each	Differs	Set multiple key/value pairs atomically per shard.
PSETEX	String	O(1)	Compatible	Set a key's value with a TTL in milliseconds.
SET	String	O(1)	Differs	Set a key's string value with optional TTL and existence conditions.
SETEX	String	O(1)	Compatible	Set a key's value with a TTL in seconds.
SETNX	String	O(1)	Compatible	Set a key's value only if it does not exist.
STRLEN	String	O(1)	Compatible	Return the length of a key's string value.
DEL	Generic	O(N) keys, plus O(M) per key holding a…	Differs	Delete one or more keys.
EXISTS	Generic	O(N) keys, one O(1) probe each	Differs	Count how many of the given keys exist.
EXPIRE	Generic	O(1)	Differs	Set a key's TTL in seconds (non-positive TTL deletes the key).
EXPIREAT	Generic	O(1)	Differs	Set a key's expiry as an absolute Unix timestamp in seconds.
PERSIST	Generic	O(1)	Compatible	Remove a key's TTL.
PEXPIRE	Generic	O(1)	Differs	Set a key's TTL in milliseconds.
PEXPIREAT	Generic	O(1)	Differs	Set a key's expiry as an absolute Unix timestamp in milliseconds.
PTTL	Generic	O(1)	Compatible	Return a key's remaining TTL in milliseconds (-1 no TTL, -2 missing).
RENAME	Generic	O(1) for a string value	Differs	Rename a key, overwriting the destination (write routed at the runtime Op level).
RENAMENX	Generic	O(1) for a string value	Differs	Rename a key only if the destination does not exist (write routed at the runtime Op level).
TTL	Generic	O(1)	Compatible	Return a key's remaining TTL in seconds (-1 no TTL, -2 missing).
TYPE	Generic	O(1)	Compatible	Return the type of the value stored at key.
UNLINK	Generic	O(N) keys, plus O(M) per collection-ty…	Differs	Delete one or more keys (alias of DEL in kevy's shard model).
KEYS	Keyspace scan	O(N) keys in the whole keyspace	Compatible	Return every key matching the glob pattern (cross-shard gather).
RANDOMKEY	Keyspace scan	O(1) expected	Differs	Return a random key from the keyspace.
SCAN	Keyspace scan	O(N) keys in the WHOLE keyspace, on ev…	Differs	Sweep the keyspace and return every match at once; NOT a cursor iterator (COUNT and TYPE are accepted and ignored, and the cursor is always 0).
BLPOP	List	O(1) to serve	Differs	Blocking left pop across one or more lists (effect logged as LPOP).
BRPOP	List	O(1) to serve	Differs	Blocking right pop across one or more lists (effect logged as RPOP).
BRPOPLPUSH	List	O(1) to serve	Differs	Blocking RPOPLPUSH: pop the source tail and push it onto the destination head.
LINDEX	List	O(1)	Compatible	Return the element at the given list index.
LLEN	List	O(1)	Compatible	Return the length of a list.
LMOVE	List	O(1)	Differs	Atomically move an element between two lists.
LPOP	List	O(C) elements popped	Differs	Pop one or more elements from the head of a list.
LPOS	List	O(N) always	Compatible	Return the index of matching elements in a list.
LPUSH	List	O(M) values, O(1) amortised each	Compatible	Prepend one or more elements to a list.
LRANGE	List	O(M) elements returned	Compatible	Return a range of list elements.
LREM	List	O(N*R) worst case	Compatible	Remove elements equal to the given value from a list.
LSET	List	O(1)	Compatible	Set the list element at the given index.
LTRIM	List	O(R) elements removed	Compatible	Trim a list to the given range.
RPOP	List	O(C) elements popped	Differs	Pop one or more elements from the tail of a list.
RPOPLPUSH	List	O(1)	Differs	Pop the source tail and push it onto the destination head.
RPUSH	List	O(M) values, O(1) amortised each	Compatible	Append one or more elements to a list.
HDEL	Hash	O(M) fields	Compatible	Delete one or more hash fields.
HEXISTS	Hash	O(1)	Compatible	Check whether a hash field exists.
HEXPIRE	Hash	O(F) fields in the FIELDS clause	Differs	Set per-field TTLs on a hash, in seconds.
HGET	Hash	O(1)	Compatible	Return the value of a hash field.
HGETALL	Hash	O(N) fields, with a full copy of every…	Compatible	Return all fields and values of a hash.
HINCRBY	Hash	O(1)	Compatible	Increment the integer value of a hash field.
HKEYS	Hash	O(N) fields	Compatible	Return all field names of a hash.
HLEN	Hash	O(1)	Compatible	Return the number of fields in a hash.
HMGET	Hash	O(M) fields requested	Compatible	Return the values of multiple hash fields.
HMSET	Hash	O(M) pairs	Compatible	Deprecated alias of HSET that replies OK.
HPERSIST	Hash	O(F) fields	Differs	Remove per-field TTLs from a hash.
HPEXPIRE	Hash	O(F) fields	Differs	Set per-field TTLs on a hash, in milliseconds.
HPEXPIREAT	Hash	O(F) fields	Differs	Set per-field expiries as absolute Unix-millisecond deadlines.
HPTTL	Hash	O(F) fields	Differs	Return per-field remaining TTLs in milliseconds (-1 no TTL, -2 missing).
HSCAN	Hash	O(N)	Differs	Iterate a hash's fields and values (single-batch cursor).
HSET	Hash	O(M) pairs	Compatible	Set one or more hash fields; returns the number of new fields.
HSETNX	Hash	O(1)	Compatible	Set a hash field only if it does not exist.
HTTL	Hash	O(F) fields	Differs	Return per-field remaining TTLs in seconds (-1 no TTL, -2 missing).
HVALS	Hash	O(N) fields	Compatible	Return all values of a hash.
SADD	Set	O(M) members	Compatible	Add one or more members to a set.
SCARD	Set	O(1)	Compatible	Return the number of members in a set.
SDIFF	Set	O(sum of the source cardinalities)	Compatible	Return the difference of the given sets (cross-shard gather).
SDIFFSTORE	Set	O(sum of the source cardinalities) + O…	Compatible	Store the difference of the given sets into destination.
SINTER	Set	O(sum of the source cardinalities)	Compatible	Return the intersection of the given sets (cross-shard gather).
SINTERSTORE	Set	O(sum of the source cardinalities) + O…	Compatible	Store the intersection of the given sets into destination.
SISMEMBER	Set	O(1)	Compatible	Check whether a value is a member of a set.
SMEMBERS	Set	O(N) members	Compatible	Return all members of a set.
SPOP	Set	O(count) expected	Differs	Remove and return one or more random members of a set.
SRANDMEMBER	Set	O(count) expected	Differs	Return one or more random members of a set without removing them.
SREM	Set	O(M) members	Compatible	Remove one or more members from a set.
SSCAN	Set	O(N)	Differs	Iterate a set's members (single-batch cursor).
SUNION	Set	O(sum of the source cardinalities)	Compatible	Return the union of the given sets (cross-shard gather).
SUNIONSTORE	Set	O(sum of the source cardinalities) + O…	Compatible	Store the union of the given sets into destination.
BZPOPMIN	Sorted set	O(log N) per pop	Compatible	Blocking pop of the lowest-scored member across one or more sorted sets.
ZADD	Sorted set	O(M log N)	Compatible	Add members with scores to a sorted set, with conditional flags.
ZCARD	Sorted set	O(1)	Compatible	Return the number of members in a sorted set.
ZCOUNT	Sorted set	O(N)	Compatible	Count members with scores within the given bounds.
ZDIFFSTORE	Sorted set	O(sum of the source cardinalities + R…	Compatible	Store the difference of the given sorted sets into destination.
ZINCRBY	Sorted set	O(log N)	Compatible	Increment a member's score in a sorted set.
ZINTERCARD	Sorted set	O(sum of the source cardinalities)	Compatible	Return the cardinality of the intersection of the given sorted sets.
ZINTERSTORE	Sorted set	O(sum of the source cardinalities + R…	Compatible	Store the intersection of the given sorted sets into destination.
ZPOPMIN	Sorted set	O(M log N)	Compatible	Pop up to count members with the lowest scores.
ZPOPMIN.BELOW	Sorted set	O(M log N)	kevy only	kevy extension: pop up to count lowest members with score strictly below the threshold (delayed-job primitive).
ZRANGE	Sorted set	O(start + M)	Differs	Return members by rank range.
ZRANGEBYSCORE	Sorted set	O(N + M)	Compatible	Return members with scores within the given bounds.
ZRANK	Sorted set	O(N)	Differs	Return a member's rank, ordered from the lowest score.
ZREM	Sorted set	O(M log N)	Compatible	Remove one or more members from a sorted set.
ZREMRANGEBYRANK	Sorted set	O(start + M log N)	Compatible	Remove members within the given rank range.
ZREMRANGEBYSCORE	Sorted set	O(N + M log N)	Compatible	Remove members with scores within the given bounds.
ZREVRANGEBYSCORE	Sorted set	O(N + M)	Compatible	Return members with scores within the given bounds, highest first.
ZSCAN	Sorted set	O(N)	Differs	Iterate a sorted set's members and scores (single-batch cursor).
ZSCORE	Sorted set	O(1)	Compatible	Return a member's score.
ZUNIONSTORE	Sorted set	O(sum of the source cardinalities + R…	Compatible	Store the union of the given sorted sets into destination.
XACK	Stream	O(A log P)	Compatible	Acknowledge pending entries for a consumer group.
XADD	Stream	O(log N) to insert	Differs	Append an entry to a stream, with optional trim.
XAUTOCLAIM	Stream	O(log P + K + COUNT log N)	Differs	Scan and claim idle pending entries starting from a cursor.
XCLAIM	Stream	O(A * (log P + log N))	Differs	Claim specific idle pending entries for a consumer.
XDEL	Stream	O(D log N + N*F) for D ids	Compatible	Delete entries from a stream by ID.
XGROUP	Stream	CREATE / DESTROY: O(1) plus an O(N*F)…	Differs	Manage stream consumer groups.
XINFO	Stream	STREAM: O(1). GROUPS: O(G*N)	Differs	Introspect a stream, its groups, or its consumers.
XLEN	Stream	O(1)	Compatible	Return the number of entries in a stream.
XPENDING	Stream	summary: O(P*C)	Compatible	Inspect pending entries of a consumer group (summary or extended form).
XRANGE	Stream	O(log N + M)	Compatible	Return stream entries within an ID range.
XREAD	Stream	O(S * (log N + M)) over S streams	Differs	Read new entries from one or more streams, optionally blocking.
XREADGROUP	Stream	'>' form: O(log N + U + M)	Differs	Read stream entries as a consumer-group member, optionally blocking.
XREVRANGE	Stream	O(log N + M)	Compatible	Return stream entries within an ID range, in reverse order.
XSETID	Stream	O(log N)	Compatible	Overwrite a stream's last-generated ID and bookkeeping counters.
XTRIM	Stream	O(R log N + N*F) for R evicted entries	Differs	Trim a stream by length or minimum ID.
GEOADD	Geo	O(M log N)	Compatible	Add geospatial members (longitude/latitude) to a geo set.
GEODIST	Geo	O(1)	Compatible	Return the distance between two geo members.
GEOHASH	Geo	O(M)	Compatible	Return the base32 geohash string of each member.
GEOPOS	Geo	O(M)	Compatible	Return the longitude/latitude of each member.
GEORADIUS	Geo	O(N) per call	Differs	Legacy radius search around a coordinate, with optional STORE writes.
GEORADIUSBYMEMBER	Geo	O(N) per call	Differs	Legacy radius search around an existing member, with optional STORE writes.
GEOSEARCH	Geo	O(N) per call	Differs	Search members within a radius or box from a member or coordinate.
GEOSEARCHSTORE	Geo	O(N) to search, plus O(D + K log K) to…	Differs	Run GEOSEARCH on source and store the hits into destination.
ECHO	Connection	O(1)	Compatible	Return the given message.
HELLO	Connection	O(1)	Differs	Handshake: report server info and switch RESP protocol version (2 or 3).
PING	Connection	O(1)	Differs	Ping the server; returns PONG or echoes the optional message.
QUIT	Connection	O(1)	Compatible	Close the connection after replying OK.
SELECT	Connection	O(1)	Differs	Select the logical database; kevy is single-DB and only accepts index 0.
BGREWRITEAOF	Server	O(S) fan-out	Differs	Start an append-only-file rewrite in the background.
BGSAVE	Server	O(S) fan-out	Differs	Start a snapshot save in the background.
CLIENT	Server	ID / GETNAME / SETNAME / INFO: O(1). L…	Differs	Connection introspection and control subcommands.
CLUSTER	Server	INFO / NODES / SLOTS / SHARDS / MYID:…	Differs	Cluster topology introspection (virtual-node model over shards).
COMMAND	Server	bare / LIST / DOCS: O(V) verbs. COUNT:…	Differs	Introspect the command table (COUNT, LIST, INFO, DOCS subcommands).
CONFIG	Server	GET: O(patterns * 16). SET: O(1) plus…	Differs	Read or change server configuration parameters.
DBSIZE	Server	O(S)	Compatible	Return the number of keys across all shards.
DEBUG	Server	SLEEP: parks the ANSWERING shard's rea…	Differs	Debug subcommands; SLEEP blocks the shard, other subcommands are tolerated as OK.
FLUSHALL	Server	O(S) fan-out	Differs	Delete every key on every shard.
FLUSHDB	Server	O(N + S)	Differs	Delete every key of the current database (kevy is single-DB: same as FLUSHALL).
INFO	Server	O(1) in the keyspace	Differs	Report server statistics and status sections as text.
MEMORY	Server	USAGE: O(1)	Differs	Memory introspection subcommands.
SAVE	Server	O(S) fan-out	Differs	Synchronously snapshot the dataset to disk.
SHUTDOWN	Server	O(1) to trip the stop flag	Differs	Stop the server process (connection drops without a reply).
SLOWLOG	Server	GET: O(S) fan-out plus O(L log L) to m…	Differs	Inspect or reset the slow-command log.
DISCARD	Transactions	O(1)	Compatible	Abort the open MULTI transaction.
EXEC	Transactions	O(sum of the queued commands' costs)	Differs	Execute every command queued since MULTI.
MULTI	Transactions	O(1)	Compatible	Start a transaction; subsequent commands are queued until EXEC.
UNWATCH	Transactions	O(1)	Compatible	Forget all watched keys.
WATCH	Transactions	O(W) keys, grouped into O(min(W,S)) cr…	Compatible	Watch keys for optimistic locking of the next EXEC.
EVAL	Scripting	O(compile + the script's own work). Th…	Differs	Run a Lua script server-side; routed to KEYS[1]'s shard when numkeys >= 1.
EVALSHA	Scripting	O(1) cache lookup, then identical to E…	Differs	Run a cached Lua script by its SHA1 digest.
SCRIPT	Scripting	LOAD: O(len(script)). EXISTS: O(k). FL…	Differs	Manage the process-wide Lua script cache.
PSUBSCRIBE	Pub/Sub	O(p * P)	Compatible	Subscribe to channels matching the given glob patterns.
PUBLISH	Pub/Sub	O(1) channel lookup + O(P)	Compatible	Post a message to a channel; returns the receiver count.
PUNSUBSCRIBE	Pub/Sub	O(p * P)	Compatible	Unsubscribe from patterns (all patterns when none given).
SUBSCRIBE	Pub/Sub	O(c) channels	Differs	Subscribe to the given channels.
UNSUBSCRIBE	Pub/Sub	O(c) channels	Compatible	Unsubscribe from channels (all channels when none given).
FAILOVER	Replication	O(1) at the command	Differs	Planned zero-loss handover: quiesce writes, wait for the target replica to drain, promote it, and follow it.
REPL.TOKEN	Replication	O(S)	kevy only	kevy extension: mint a read-your-writes token — per-shard [generation, offset] pairs (a primary reports its live feed tail; a replica its applied positions).
REPL.WAIT	Replication	O(S)	kevy only	kevy extension: on a replica, block until every shard has applied the given REPL.TOKEN (then reads are read-your-writes); +OK on success, -MISDIRECTED writer is <primary> on timeout or generation mismatch. Default TIMEOUT 1000 ms, hard cap 60 s. On a primary: immediate +OK.
REPLICAOF	Replication	O(1) at the command	Differs	Make this server a replica of another, or promote it with NO ONE.
ROLE	Replication	O(1) on a replica	Compatible	Report the replication role and state of this server.
SLAVEOF	Replication	O(1) plus a background resync	Differs	Legacy alias of REPLICAOF.
WAIT	Replication	O(S)	Differs	Block until every shard's master_repl_offset is acknowledged by at least numreplicas replicas (or timeout ms pass); returns the minimum acked-replica count across shards. timeout 0 = wait forever, hard-capped at 60 s. NOTE: a replica ACK is not fsync durability.
IDX.COUNT	Indexes	O(log N + matched) per shard	kevy only	Count index entries matching a range or equality predicate.
IDX.CREATE	Indexes	O(1) at the call	kevy only	Declare a secondary index over a key prefix (catalog mutation, sidecar-persisted).
IDX.DROP	Indexes	O(catalog size)	kevy only	Drop a declared index (catalog mutation, sidecar-persisted).
IDX.EXPLAIN	Indexes	The plan is parse-only, but est_rows c…	kevy only	The IDX.QUERY parse without the execution: kind, state, est_rows, and the plan line.
IDX.LIST	Indexes	Not O(1)	kevy only	List declared indexes with per-index build state and stats.
IDX.QUERY	Indexes	Depends on the index kind. range: O(lo…	kevy only	Query an index: range/equality, text MATCH, vector KNN, aggregation groups, or a two-index COMPOSE.
IDX.REBUILD	Indexes	Vector indexes only (tombstone compact…	kevy only	Rebuild an ANN index (tombstone compaction).
IDX.VERIFY	Indexes	O(N) per shard	kevy only	Verify an index: re-read every held entry against its row and report entries/bytes/coerce_failures/duplicates/drift/checked.
VIEW.CREATE	Views	O(tree size) at the call. A materializ…	kevy only	Declare a composed view over indexes with an ORDER BY (catalog mutation, sidecar-persisted).
VIEW.DROP	Views	O(catalog size)	kevy only	Drop a declared view (catalog mutation, sidecar-persisted).
VIEW.EXPLAIN	Views	O(sum over leaves of (log N + matched))	kevy only	Explain a view's composition tree with per-leaf cardinalities.
VIEW.LIST	Views	O(views) at the origin	kevy only	List declared views with their mode and shape.
VIEW.QUERY	Views	virtual: O(log N_order + candidates *…	kevy only	Page through a view's ordered members, optionally hydrating fields via the VIA template.
VIEW.REBUILD	Views	Materialized only. A full eval_tree ov…	kevy only	Force a rebuild of a materialized view.
VIEW.VERIFY	Views	materialized: O(M). virtual: O(sum ove…	kevy only	Verify a view and report member/byte statistics.
FEED.READ	Change feed	A single shard (the shard is an argume…	kevy only	Read change-feed frames from one shard past a generation/offset cursor.
FEED.SHARDS	Change feed	O(1), answered locally	kevy only	Return the number of change-feed shards.
FEED.TAIL	Change feed	O(1) on a single shard	kevy only	Return a shard's current feed generation and next offset.
PREFIX.DIGEST	Migration	O(keys on the shard) to walk plus O(su…	kevy only	Order-insensitive checksum of a prefix's rows for migration verification.
PREFIX.STATS	Migration	O(keys on the shard)	kevy only	Report key-count and byte statistics for a key prefix.