# MSETEX

> Set multiple keys with one expiration.

Use `MSETEX` to set several keys and give them all the same expiration in one atomic step.

[`MSET`](/redis/commands/string/mset) can write a group of keys together but leaves them without a lifetime, so attaching one has to be a second round trip during which the keys already exist unbounded. `MSETEX` closes that window: the values and the expiration are applied together, which is what you want for a set of keys that are only meaningful as a group, such as the parts of one cached response.

`NX` writes only when none of the keys exists and `XX` only when all of them do. The check covers the whole group, so a single key breaking the condition leaves everything unwritten and the reply is `0`. `EX`, `PX`, `EXAT`, and `PXAT` set the lifetime as a duration or as an absolute deadline, and `KEEPTTL` keeps whatever lifetime each key already had. Without any of these the keys are written without an expiration, discarding any they had, exactly as [`MSET`](/redis/commands/string/mset) does.

`<numkeys>` says how many key-value pairs follow; anything after them is read as options.

## Syntax

```redis
MSETEX <numkeys> <key> <value> [<key> <value> ...]
  [NX | XX]
  [EX <seconds> | PX <milliseconds> | EXAT <unix-time-seconds> |
    PXAT <unix-time-milliseconds> | KEEPTTL]
```

## Arguments

| Argument | Required | Repeatable | Description |
| --- | --- | --- | --- |
| `<numkeys>` | Yes | No | Number of key-value pairs that follow. Must be at least `1`. |
| `<key> <value>` | Yes | Yes | Key and the value to store in it. Repeat `<numkeys>` times. |
| `(NX \| XX)` | No | No | Choose one form: `NX` (write only when none of the keys exists); `XX` (write only when all of them exist). |
| `(EX <seconds> \| PX <milliseconds> \| EXAT <unix-time-seconds> \| PXAT <unix-time-milliseconds> \| KEEPTTL)` | No | No | Choose one form: `EX` (set a lifetime in seconds); `PX` (set a lifetime in milliseconds); `EXAT` (expire at a Unix timestamp in seconds); `PXAT` (expire at a Unix timestamp in milliseconds); `KEEPTTL` (preserve each key's existing lifetime). |

## Important points

- `NX` and `XX` are mutually exclusive, and at most one expiration form may be given.
- The condition is evaluated over the whole group: with `NX` a single existing key stops the write, and with `XX` a single missing key does.
- Without an expiration option the keys are written without a lifetime, discarding any they had. `KEEPTTL` preserves each key's own current lifetime.
- `EX` and `PX` must be greater than `0`. An `EXAT` or `PXAT` deadline in the past deletes the keys instead of writing them, and the reply is still `1`.
- The options may be given in any order after the key-value pairs.

## Response

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

| Protocol | Reply |
| --- | --- |
| RESP2 | Integer: `1` if the keys were set, `0` if a condition prevented the write |
| RESP3 | Integer: `1` if the keys were set, `0` if a condition prevented the write |

<Note>
  Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.
</Note>

## Examples

TCP examples use the TLS `REDIS_URL` from the Upstash console. REST examples use `UPSTASH_REDIS_REST_URL` and `UPSTASH_REDIS_REST_TOKEN`.

<AccordionGroup>

<Accordion title="Redis CLI" icon="terminal">

```bash
MSETEX 2 key1 value1 key2 value2 EX 60
```

</Accordion>

<Accordion title="@upstash/redis" icon="node-js" iconType="brands">

<Note>
  This command is not supported yet in `@upstash/redis`.
</Note>

</Accordion>

<Accordion title="upstash_redis" icon="python" iconType="brands">

<Note>
  This command is not supported yet in `upstash_redis`.
</Note>

</Accordion>

<Accordion title="ioredis" icon="node-js" iconType="brands">

```ts
import Redis from "ioredis";

const redis = new Redis(process.env.REDIS_URL!);
const result = await redis.msetex(2, "key1", "value1", "key2", "value2", "EX", 60);
console.log(result);
```

</Accordion>

<Accordion title="node-redis" icon="node-js" iconType="brands">

```ts
import { createClient } from "redis";

const client = await createClient({ url: process.env.REDIS_URL })
  .on("error", console.error)
  .connect();
const result = await client.mSetEx(
  { key1: "value1", key2: "value2" },
  { expiration: { type: "EX", value: 60 } },
);
console.log(result);
```

</Accordion>

<Accordion title="redis-py" icon="python" iconType="brands">

```python
import os
import redis

client = redis.from_url(os.environ["REDIS_URL"])
result = client.msetex(mapping={"key1": "value1", "key2": "value2"}, ex=60)
print(result)
```

</Accordion>

<Accordion title="go-redis" icon="golang" iconType="brands">

```go
package main

import (
    "context"
    "fmt"
    "os"

    "github.com/redis/go-redis/v9"
)

func main() {
    opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))
    if err != nil {
        panic(err)
    }
    client := redis.NewClient(opts)
    args := redis.MSetEXArgs{Expiration: &redis.ExpirationOption{Mode: redis.EX, Value: 60}}
    result, err := client.MSetEX(context.Background(), args, "key1", "value1", "key2", "value2").Result()
    if err != nil {
        panic(err)
    }
    fmt.Println(result)
}
```

</Accordion>

<Accordion title="jedis" icon="java" iconType="brands">

```java
import java.net.URI;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.params.MSetExParams;

try (Jedis jedis = new Jedis(new URI(System.getenv("REDIS_URL")))) {
  boolean result = jedis.msetex(new MSetExParams().ex(60), "key1", "value1", "key2", "value2");
  System.out.println(result);
}
```

</Accordion>

<Accordion title="redis-rs" icon="rust" iconType="brands">

```rust
use redis::TypedCommands;

fn main() -> redis::RedisResult<()> {
    let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");
    let client = redis::Client::open(url)?;
    let mut connection = client.get_connection()?;

    let options = redis::MSetOptions::default().with_expiration(redis::SetExpiry::EX(60));
    let result = connection.mset_ex(&[("key1", "value1"), ("key2", "value2")], options)?;
    println!("{result:?}");
    Ok(())
}
```

</Accordion>

</AccordionGroup>