Meteor, MongoDB, oplog tailing and you Prior art Pub sub Live data sets Poll and diff What's wrong with poll and diff? More writes, more polls Mongo bandwidth Large record sets Latency What is oplog? MongoDB replica set A capped collection A rolling record of all operations that modify data What is oplog tailing? Follow along and find out about changes immediately Let the database tell us when things have changed What does an entry look like? { "ts" : Timestamp(1396897233, 1), "h" : NumberLong(-8686789604923146223), "v" : 2, "op" : "i", "ns" : "bookstore.users", "o" : { "password" : "$2a$10$ZK5uFJ8T4Z.TMbvafMIpauYQf0CrGN2DXbJrgVlbFlOgDHnTjWTw6", "email" : "test@example.org", "name" : "Test User", "settings" : { "fontSize" : 160, "colourScheme" : "standard" }, "books" : [], "canAccessKeystone" : false, "joinDate" : ISODate("2014-04-07T19:00:33.371Z"), "_id" : ObjectId("5342f5d15d28ce2802021770"), "__v" : 0 } } What does it mean? Less computation Reduced db bandwidth More connected clients Profit? More info http://www.manuel-schoebel.com/blog/meteorjs-and-mongodb-replica-set-for-oplog-tailing http://www.slideshare.net/yaliceme/glasser-devshop10oplog
Nice! Great Summary!