gistfile1.txt

# We want to create our new object, and make sure it is in the Set of existing objects.
1) INCR object.nextid => 1000 # Get an unique ID for the next object
2) SET object:1000 "my object value" # Set the value of the object
3) SADD all.my.objects 1000 # Add the ID of the object to the target Set, representing all the objects

What happens if the client dies between 2 and 3? We have the object key, but "leaked" it forever as it's no longer in Set of our objects.

MULTI/EXEC fix this problem:

1) INCR object:nextid => 1000
2) MULTI
3) SET object:1000 ...
4) SADD all.my.objects 1000
5) EXEC

Either both the operations are performed or none, no inconsistent state in our dataset.