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/**
* This test is labeled resource intensive because its total io_write is 95MB compared to a median
* of 5MB across all sharding tests in wiredTiger.
* @tags: [resource_intensive]
*/
(function() {
"use strict";
// TODO: SERVER-33830 remove shardAsReplicaSet: false
var st = new ShardingTest({
name: 'migrateBig_balancer',
shards: 2,
other: {enableBalancer: true, shardAsReplicaSet: false}
});
var mongos = st.s;
var admin = mongos.getDB("admin");
var db = mongos.getDB("test");
var coll = db.getCollection("stuff");
assert.commandWorked(admin.runCommand({enablesharding: coll.getDB().getName()}));
st.ensurePrimaryShard(coll.getDB().getName(), st.shard1.shardName);
var data = "x";
var nsq = 16;
var n = 255;
for (var i = 0; i < nsq; i++)
data += data;
var dataObj = {};
for (var i = 0; i < n; i++)
dataObj["data-" + i] = data;
var bulk = coll.initializeUnorderedBulkOp();
for (var i = 0; i < 40; i++) {
bulk.insert({data: dataObj});
}
assert.writeOK(bulk.execute());
assert.eq(40, coll.count(), "prep1");
assert.commandWorked(admin.runCommand({shardcollection: "" + coll, key: {_id: 1}}));
st.printShardingStatus();
assert.lt(
5, mongos.getDB("config").chunks.find({ns: "test.stuff"}).count(), "not enough chunks");
assert.soon(() => {
let res =
mongos.getDB("config")
.chunks
.aggregate(
[{$match: {ns: "test.stuff"}}, {$group: {_id: "$shard", nChunks: {$sum: 1}}}])
.toArray();
printjson(res);
return res.length > 1 && Math.abs(res[0].nChunks - res[1].nChunks) <= 3;
}, "never migrated", 10 * 60 * 1000, 1000);
st.stop();
})();
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