blob: 77204e1e9595a38ac267e3de0dfffa7d80f2ce03 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
In Redis Cluster, each node keeps track of which master is serving
a particular hash slot.
The `CLUSTER DELSLOTS` command asks a particular Redis Cluster node to
forget which master is serving the hash slots specified as arguments.
In the context of a node that has received a `CLUSTER DELSLOTS` command and
has consequently removed the associations for the passed hash slots,
we say those hash slots are *unbound*. Note that the existence of
unbound hash slots occurs naturally when a node has not been
configured to handle them (something that can be done with the
`CLUSTER ADDSLOTS` command) and if it has not received any information about
who owns those hash slots (something that it can learn from heartbeat
or update messages).
If a node with unbound hash slots receives a heartbeat packet from
another node that claims to be the owner of some of those hash
slots, the association is established instantly. Moreover, if a
heartbeat or update message is received with a configuration epoch
greater than the node's own, the association is re-established.
However, note that:
1. The command only works if all the specified slots are already
associated with some node.
2. The command fails if the same slot is specified multiple times.
3. As a side effect of the command execution, the node may go into
*down* state because not all hash slots are covered.
## Example
The following command removes the association for slots 5000 and
5001 from the node receiving the command:
> CLUSTER DELSLOTS 5000 5001
OK
## Usage in Redis Cluster
This command only works in cluster mode and may be useful for
debugging and in order to manually orchestrate a cluster configuration
when a new cluster is created. It is currently not used by `redis-cli`,
and mainly exists for API completeness.
@return
@simple-string-reply: `OK` if the command was successful. Otherwise
an error is returned.
|
