[Feature] ArangoDb Repo Metadata Only Mode

[AronPerez]

Problem We Want to Solve

We want to figure out how to represent a repo in ArangoDb when someone is using Metadata Mode. The Repo and User documents are nodes in the database, the allocation connects the two.

Why not have a separate allocation per repository per project?
We don't need multiple repo's.
We assume that you only need 1 repository when in Metadata mode

Describe the Solution You'd Like

Alternatives (optional)

There are 2 ways to create an alloc

• User
• Project

Additional context

How a repo looks in Arango

Arango Queries for setting up Repo + Alloc

db._useDatabase("sdms");


db.repo.save({
    "_key" : "empty",
    "_id" : "repo/empty",
    "capacity" : 80000000000000,
    "pub_key" : "dummy_repo_key",
    "address" : "tcp://somedomain:9000",
    "endpoint" : "<endpoint UUID>",
    "path" : "/path/to/content/empty/",
    "title" : "My dummy repo",
    "desc" : "",
    "domain" : "localhost"
});

db.alloc.save({
    "_key" : "6956825",
    "_id" : "alloc/6956825",
    "_from" : "u/<someone>_username",
    "_to" : "repo/cades-test",
    "_rev" : "_iAbn6Eq--t",
    "path" : "/data/cades-test/user/<someone>_username/",
    "rec_count" : 0,
    "rec_limit" : 1000,
    "data_size" : 0,
    "data_limit" : 104857600
  })

Data Model

https://confluence.ccs.ornl.gov/pages/viewpage.action?pageId=344163314&spaceKey=DATAFED&title=STRUCTURAL%2B-%2BData%2BModel%2B1

For a Metadata only repo, only need

- title
- _id
- _key
- summary

For a metadata only repo, only need

 _from 
- _to
_ rec_limit
_ rec_count

Repo Document is touched here:
Allocation document is touched here:

• support.js (assignRepo function)
• support.js (verifyRepo function)
• repo_router.js ( .post("/create"))
• core/database/foxx/api/support.js:178