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// Tests tracking of latestOptime and earliestOptime in serverStatus.oplog
function timestampCompare(o1, o2) {
if (o1.t < o2.t) {
return -1;
} else if (o1.t > o2.t) {
return 1;
} else {
if (o1.i < o2.i) {
return -1;
} else if (o1.i > o2.i) {
return 1;
} else {
return 0;
}
}
}
function optimesAreEqual(replTest) {
var prevStatus = replTest.nodes[0].getDB('admin').serverStatus({oplog: true}).oplog;
for (var i = 1; i < replTest.nodes.length; i++) {
var status = replTest.nodes[i].getDB('admin').serverStatus({oplog: true}).oplog;
if (timestampCompare(prevStatus.latestOptime, status.latestOptime) != 0) {
return false;
}
prevStatus = status;
}
return true;
}
var replTest = new ReplSetTest({name: "replStatus", nodes: 3, oplogSize: 1});
replTest.startSet();
replTest.initiate();
var master = replTest.getPrimary();
replTest.awaitReplication();
replTest.awaitSecondaryNodes();
// Check initial optimes
assert(optimesAreEqual(replTest));
var initialInfo = master.getDB('admin').serverStatus({oplog: true}).oplog;
// Do an insert to increment optime, but without rolling the oplog
// latestOptime should be updated, but earliestOptime should be unchanged
var options = {
writeConcern: {w: replTest.nodes.length}
};
assert.writeOK(master.getDB('test').foo.insert({a: 1}, options));
assert(optimesAreEqual(replTest));
var info = master.getDB('admin').serverStatus({oplog: true}).oplog;
assert.gt(timestampCompare(info.latestOptime, initialInfo.latestOptime), 0);
assert.eq(timestampCompare(info.earliestOptime, initialInfo.earliestOptime), 0);
// Insert some large documents to force the oplog to roll over
var largeString = new Array(1024 * 10).toString();
for (var i = 0; i < 2000; i++) {
master.getDB('test').foo.insert({largeString: largeString}, options);
}
assert.soon(function() {
return optimesAreEqual(replTest);
});
// Test that earliestOptime was updated
info = master.getDB('admin').serverStatus({oplog: true}).oplog;
assert.gt(timestampCompare(info.latestOptime, initialInfo.latestOptime), 0);
assert.gt(timestampCompare(info.earliestOptime, initialInfo.earliestOptime), 0);
replTest.stopSet();
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