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/**
* Testing migrations are successful and immediately visible on the secondaries, when
* secondaryThrottle is used.
*/
(function() {
'use strict';
// The mongod secondaries are set to priority 0 and votes 0 to prevent the primaries
// from stepping down during migrations on slow evergreen builders.
var s = new ShardingTest({
shards: 2,
other: {
chunkSize: 1,
rs0: {
nodes: [
{rsConfig: {votes: 1}},
{rsConfig: {priority: 0, votes: 0}},
],
},
rs1: {
nodes: [
{rsConfig: {votes: 1}},
{rsConfig: {priority: 0, votes: 0}},
],
}
}
});
var bulk = s.s0.getDB('TestDB').TestColl.initializeUnorderedBulkOp();
for (var i = 0; i < 2100; i++) {
bulk.insert({_id: i, x: i});
}
assert.writeOK(bulk.execute());
assert.commandWorked(s.s0.adminCommand({enablesharding: 'TestDB'}));
s.ensurePrimaryShard('TestDB', s.shard0.shardName);
assert.commandWorked(s.s0.adminCommand({shardcollection: 'TestDB.TestColl', key: {_id: 1}}));
for (i = 0; i < 20; i++) {
assert.commandWorked(s.s0.adminCommand({split: 'TestDB.TestColl', middle: {_id: i * 100}}));
}
var collPrimary = (new Mongo(s.s0.host)).getDB('TestDB').TestColl;
assert.eq(2100, collPrimary.find().itcount());
var collSlaveOk = (new Mongo(s.s0.host)).getDB('TestDB').TestColl;
collSlaveOk.setSlaveOk();
assert.eq(2100, collSlaveOk.find().itcount());
for (i = 0; i < 20; i++) {
// Needs to waitForDelete because we'll be performing a slaveOk query, and secondaries don't
// have a chunk manager so it doesn't know how to filter out docs it doesn't own.
assert.commandWorked(s.s0.adminCommand({
moveChunk: 'TestDB.TestColl',
find: {_id: i * 100},
to: s.shard1.shardName,
_secondaryThrottle: true,
writeConcern: {w: 2},
_waitForDelete: true
}));
assert.eq(2100,
collSlaveOk.find().itcount(),
'Incorrect count when reading from secondary. Count from primary is ' +
collPrimary.find().itcount());
}
s.stop();
}());
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