https://github.com/bitemyapp/brambling/
This is a very early point in time for the library, (alpha), but it has already been useful at work so I figured I would get it out there to see what bits people did and didn't care about. Why this exists: As with any historical database you have to migrate the transaction log in addition to the "current" state of the universe. Conveniently, Datomic makes querying at arbitrary points of time rather easily. Less conveniently, there's no map/reduce sugar for performing migrations so I needed to put together a toolkit to handle reducing over the origin tx-log, carrying over entity identities consistently (old -> tempid -> new), and translating the transactions with the new schema being first at the head of the destination. There are some pretty serious limitations (incremental migrations principally) but I don't think they're showstoppers, and like I said, this has already been useful for migrating production data. Let me know if you have any questions! --- Chris -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
