CLUSTER SETSLOT

Binds a hash slot to a node.

Browse all commands · Upstream source documentation

Reference field	Value
Canonical name	CLUSTER SETSLOT
Catalog group	Cluster commands
Upstream since	3.0.0 — upstream Redis/module version, not an ffkv release
Pinned catalog	Redis 8.10.0

Syntax

CLUSTER SETSLOT slot <IMPORTING node-id | MIGRATING node-id |
  NODE node-id | STABLE>

ffkv behavior and limits

Requires —cluster-enabled. Hash slots, MOVED/ASK, membership, migration and failover use ffkv’s authenticated peer bus, not the Redis cluster bus. Do not attempt to join a Redis cluster. Tested behavior is not production-HA certification.

Source: README.md:625–642; tests/bdd/features/cluster.feature.

All requests share the 8 MiB framing/1,024-argument ingress limit; normal RESP replies have 64 MiB wire/logical budgets with bounded nesting/value counts. Management and Lua origins impose smaller budgets. These are not a process RSS cap. Catalog inclusion is not exhaustive option or wire-format parity. See limits and compatibility.

Upstream metadata

The following fields come from the pinned Redis metadata, not measured ffkv performance or an assertion that ffkv enforces every upstream flag. Running COMMAND INFO/COMMAND DOCS describe the current engine.

Upstream Redis complexity: O(1)

Upstream arity: -4 (includes the command name; a negative number is a minimum).

Command flags: NO_ASYNC_LOADING, ADMIN, STALE.

Argument structure

Argument	Type	Constraints / metadata
slot	integer	Required
subcommand	oneof	Required
↳ importing	string	token: IMPORTING
↳ migrating	string	token: MIGRATING
↳ node	string	token: NODE
↳ stable	pure-token	token: STABLE

Additional pinned upstream metadata

{
  "group": "cluster",
  "since": "3.0.0"
}

Metadata source · Local snapshot: src/command_metadata.json, key cluster|setslot.

BDD coverage and source examples

These are source observations, not a test run performed by this documentation build. A tag identifies scenario intent; an extracted vector identifies a command invocation, which may intentionally produce an error. Scenarios may require setup, multiple connections, persistence, cluster nodes or native-module fixtures.

• Legacy importing grants ASKING for exactly one command on one connection — tests/bdd/features/cluster.feature:379; command tag and invocation observed.
• A mixed-present multi-key migration request returns TRYAGAIN without mutation — tests/bdd/features/cluster.feature:460; command tag and invocation observed.
• Dynamic script admission shares importing and migrating key visibility — tests/bdd/features/cluster.feature:1379; command tag and invocation observed.

Extracted command vectors

The following JSON arrays are the test harness’s argument vectors, not shell commands. Numeric arguments are converted by the harness; objects of the form {"base64":"…"} represent decoded binary bytes, not a literal JSON command argument. Preserve scenario setup and connection ordering. See the CLI guide for shell quoting and binary stdin. No reply is invented or inferred.

Legacy importing grants ASKING for exactly one command on one connection — tests/bdd/features/cluster.feature:450 (node “node1” executes:)

Fixture-dependent: {{…}} tokens are replaced by the BDD runtime (for example, node ports, generated IDs or temporary paths). This is not a standalone executable command.

[
  "CLUSTER",
  "SETSLOT",
  "{{node1_slot}}",
  "STABLE"
]

Next source assertion: the reply equals:

"OK"

A mixed-present multi-key migration request returns TRYAGAIN without mutation — tests/bdd/features/cluster.feature:470 (node “node1” executes:)

Fixture-dependent: {{…}} tokens are replaced by the BDD runtime (for example, node ports, generated IDs or temporary paths). This is not a standalone executable command.

[
  "CLUSTER",
  "SETSLOT",
  "{{node1_slot}}",
  "MIGRATING",
  "{{node2_id}}"
]

Next source assertion: the reply equals:

"OK"

Dynamic script admission shares importing and migrating key visibility — tests/bdd/features/cluster.feature:1389 (node “node2” executes:)

Fixture-dependent: {{…}} tokens are replaced by the BDD runtime (for example, node ports, generated IDs or temporary paths). This is not a standalone executable command.

[
  "CLUSTER",
  "SETSLOT",
  "{{node1_slot}}",
  "IMPORTING",
  "{{node1_id}}"
]

Next source assertion: the reply equals:

"OK"