Does sharedb Mongo support double write databases?

[tuluffy]

For example, one database performs OP persistence (old OPS will be deleted at intervals), and the other database records all OPS (for behavior analysis). thx!

[alecgibson]

This sounds like a classic case for op submission middleware — you want to add a hook to eg afterWrite, and then save the op (and potentially snapshot, metadata, etc.) to whatever database/store/warehouse/lake you want to stash it in for later analysis.