MongoDB Oplog入門

http://www.mongodb.org/display/DOCS/Replica+Sets+-+Oplog

myset:PRIMARY> db.mycoll.insert({x:1})

myset:PRIMARY> db.mycoll.update({x:1}, {$set : {y:1}})

myset:PRIMARY> db.mycoll.update({x:2}, {$set : {y:1}}, true)

myset:PRIMARY> db.mycoll.remove({x:1})

myset:PRIMARY> db.mycoll.find()

{ "_id" : ObjectId("4def8e5fb07da951204c60e0"), "x" : 1, "y" : 1 }

{ "_id" : ObjectId("4def8e5fd60f868d9ea77776"), "x" : 2, "y" : 1 }

myset:PRIMARY> use local

myset:PRIMARY> db.oplog.rs.find().sort({$natural:-1})

{ "ts" : { "t" : 1307545183000, "i" : 4 }, "h" : NumberLong("-1214445074120755058"), "op" : "d",

"ns" : "test.mycoll", "b" : true, "o" : { "_id" : ObjectId("4def8e5fb07da951204c60e0") } }

{ "ts" : { "t" : 1307545183000, "i" : 3 }, "h" : NumberLong("296197708926251535"), "op" : "i",

"ns" : "test.mycoll", "o" : { "_id" : ObjectId("4def8e5fd60f868d9ea77776"), "x" : 2, "y" : 1 } }

{ "ts" : { "t" : 1307545183000, "i" : 2 }, "h" : NumberLong("6923456793495821492"), "op" : "u",

"ns" : "test.mycoll", "o2" : { "_id" : ObjectId("4def8e5fb07da951204c60e0") }, "o" : { "$set" :

{ "y" : 1 } } }

{ "ts" : { "t" : 1307545183000, "i" : 1 }, "h" : NumberLong("-4148240362977057242"), "op" : "i",

"ns" : "test.mycoll", "o" : { "_id" : ObjectId("4def8e5fb07da951204c60e0"), "x" : 1 } }

...

Wed Jun 8 23:53:38 [conn6] getmore local.oplog.rs cid:3687673685314762755 getMore:

{ ts: { $gte: new Date(5615858237044687812) } } bytes:20 nreturned:0 3022ms







...

myset:SECONDARY> db.oplog.rs.find().sort({$natural:-1})

{ "ts" : { "t" : 1307545183000, "i" : 4 }, "h" : NumberLong("-1214445074120755058"), "op" : "d",

"ns" : "test.mycoll", "b" : true, "o" : { "_id" : ObjectId("4def8e5fb07da951204c60e0") } }

{ "ts" : { "t" : 1307545183000, "i" : 3 }, "h" : NumberLong("296197708926251535"), "op" : "i",

"ns" : "test.mycoll", "o" : { "_id" : ObjectId("4def8e5fd60f868d9ea77776"), "x" : 2, "y" : 1 } }

{ "ts" : { "t" : 1307545183000, "i" : 2 }, "h" : NumberLong("6923456793495821492"), "op" : "u",

"ns" : "test.mycoll", "o2" : { "_id" : ObjectId("4def8e5fb07da951204c60e0") }, "o" : { "$set" :

{ "y" : 1 } } }

{ "ts" : { "t" : 1307545183000, "i" : 1 }, "h" : NumberLong("-4148240362977057242"), "op" : "i",

"ns" : "test.mycoll", "o" : { "_id" : ObjectId("4def8e5fb07da951204c60e0"), "x" : 1 } }

...

MongoDB Oplog入門

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MongoDB Oplog入門