First, OSDBs optimise on performance and stability, but are not burdened with the kinds of complexity that make other databases difficult to administer.
Because they will have deliberated carefully over whether and how to employ OSDBs, the products are unlikely to be taxed in unexpected directions.
However, despite the glowing reports from users, OSDBs have three particular technical challenges to overcome that users must consider:
Scalability OSDBs are solidly in gigabyte territory.
As such, organisations need to compare the complexity of required queries to the SQL syntax supported by OSDBs.
If OSDBs can improve scalability and keep administration simple, those costs will ease in the long term.