The Redis DUMP command serialises the value stored at a specified key in a Redis-specific format and returns it to the user.

The serialisation format contains a 64-bit checksum that is used to make sure errors will be detected. The values are in the same format used by the RDB. Also, an RDB version is encoded inside the serialised value, so that different Redis versions with incompatible RDB formats will refuse to process the serialised value.

Syntax

DUMP key

Where key is the key for whose value we want to serialise.

Example

Suppose we set a key/value pair:

SET type "Dog"

Result:

OK

In this case, type the key and "Dog" is its value.

Now let’s use DUMP against that value:

DUMP type

Result:

"\x00\x03Dog\n\x00\x14\x069\xb24\x14\xe4\xd6"

Note that the serialised value does not contain expire information. We can use the TTL or PTTL commands to get expire information for a given key.

When the Key Doesn’t Exist

If the key doesn’t exist, DUMP returns nil:

DUMP nonexistentkey

Result:

(nil)

Restore the Value

We can use the RESTORE command to restore the serialised data back to its original form.