Atomicity of operations

[shree675]

Are commands like SET and GET on the same key atomic? As in, are the locks implemented on each key?
Let's say the below command is being executed:

$ GETDEL k

While the above command is being executed, assume that another command is run in parallel:

$ GET k

Now, does the second command wait until the GETDEL is done and return nil or could it return v?