4 ms·

Interesting, I didn't know the oplog was a documented feature available to users of mongo. Certainly an interesting way to be notified of changes.

• arunoda 13y ago
  Oplog is a capped collection. We can tail capped collection and get new document as we write into it.
  • nickzoic 13y ago
    It's a very useful feature, which can feed a cache layer, act as a kind of trigger mechanism or give you a (very limited) kind of transaction.