How to use redis to store hierarchical data?

Question

I have a set of hierarchical data to store, the hierarchy is like site/building/floor, the data, for example

{ 
   site:\'New York\',
   buildings: [
                    


        

Answer 1

In Redis you won't store your data in a unique data structure. You have to create multiple data structure, each one being identified by a key.

Use a convention to name yours keys: by example site:<CITY>:buildings will be a set that contains the list of building ids for a given site.

Then define hashes to store each building description. The key for these hashes could be something like: building:<ID>

In the hash you have 2 members: name and floors. Floors value is the unique id of the set containing the list of floor identifiers.

Then create a last set for each floor, to store the room names. The name of the sets could be something like: floor:<ID>.

Tips:

• use redis INCR command to generate unique IDs.
• avoid too long keys if you intend to store a very high number of them (longer keys require more memory)