Does it work in a mirror constellation?

In a historical context:
- the Kernel is essentially MUMPS
- ECP (DCP), the Cache Object model (NextGen) and the concept of Namespaces, Databases and Mappings came originally from DataTree

'Beating' Oracle/ SQLServer et al, is piece of cake for IRIS.
What I am more worried about is 'new' technologies such as "Eventual Consistent" synchronization on large clusters.
I think IRIS could do more on clustering techniques.

 

Is this only for very large tables?
Because we have logging that nobody looks at after a month of three, but we have to keep them for five years.