The document discusses the implementation of a NoSQL design using aging buckets to manage relationships while ensuring data persistence without extensive alterations to the existing database. It emphasizes the use of Riak and Solr for data storage and indexing, utilizing CRDTs for handling simultaneous writes. The approach aims to simplify and scale the database architecture while addressing potential conflicts in user profile views.

1. NoSQL
Implementations
Real-world designs explored by
Matt Brender

2. Aging
Buckets
Emphasis on persisting data.
Not a lot of data.
Possibility of conflict.
3

3. Aging Buckets
Problem
Difficult to know what user viewed who’s profile
• Don’t want to heavily edit current database design
• Want a simple, scalable solution
Solution
Buckets of relationships using sets (CRDT)
• Allows for simultaneous writes without siblings
• Denormalize and flatten data as JSON
• Store in Riak, index with Solr
4

4. Aging Buckets
{
[“Beth” : “Tom”],
[“Beth” : “Jim”],
[“Beth” : “George”]
}
2015:05:27
{
[“George” : “Tom”],
[“Beth” : “Jim”],
[“George” : “Jim”]
}
2015:05:26
{
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}
2015:05:25
5

5. Aging Buckets
Riak
6
Client
Client
Client

6. Aging Buckets
Riak
7
Client
Client
Client
{
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}
{
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}

7. Aging Buckets
Riak
8
Client
Client
Client
{
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}

8. Aging Buckets
Riak
9
Client
Client
Client
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}

9. Aging Buckets
Riak
10
Client
Client
Client
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
} {
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}

10. Aging Buckets
Riak
11
Client
Client
Client
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
} {
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}

11. Aging Buckets
Riak
12
Client
Client
Client
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”],
[“Tom”: “Jane”]
}
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
} {
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}

12. Aging Buckets
Riak
13
ClientClient
Client
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”],
[“Tom”: “Jane”]
}
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”],
[“Beth”, “Jane”]
} {
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”]
}

13. Aging Buckets
Riak
14
ClientClient
Client
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”],
[“Tom”: “Jane”]
}
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”],
[“Beth”, “Jane”]
}
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”],
[“Beth”, “Jane”]
}

14. 15
Bucket properties
an important step in this case
➜ bin/riak-admin bucket-type create sets
'{"props":{"datatype":"set"}}'
sets created
➜ bin/riak-admin bucket-type activate sets
sets has been activated
require ‘riak’
Riak::Crdt::DEFAULT_BUCKET_TYPES[:set] = 'sets'

15. Aging Buckets
{ [“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”],
[“Tom”: “Jane”],
[“Beth”: “Jane”] }
16
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”],
[“Tom”: “Jane”]
}
{
[“Jane”: “Tom”],
[“Tom” : “Beth”],
[“Beth” : “Tom”],
[“George” : “Jim”],
[“Beth”, “Jane”]
}
}set CRDT behavior