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'use strict';
/**
* agg_sort_external.js
*
* Runs an aggregation with a $match that returns half the documents followed
* by a $sort on a field containing a random float.
*
* The data returned by the $match is greater than 100MB, which should force an external sort.
*/
load('jstests/concurrency/fsm_libs/extend_workload.js'); // for extendWorkload
load('jstests/concurrency/fsm_workloads/agg_base.js'); // for $config
load('jstests/concurrency/fsm_workload_helpers/drop_utils.js'); // for dropCollections
var $config = extendWorkload(
$config,
function($config, $super) {
// use enough docs to exceed 100MB, the in-memory limit for $sort and $group
$config.data.numDocs = 24 * 1000;
var MB = 1024 * 1024; // bytes
// assert that *half* the docs exceed the in-memory limit, because the $match stage will
// only
// pass half the docs in the collection on to the $sort stage.
assertAlways.lte(100 * MB, $config.data.numDocs * $config.data.docSize / 2);
$config.data.getOutputCollPrefix = function getOutputCollPrefix(collName) {
return collName + '_out_agg_sort_external_';
};
$config.states.query = function query(db, collName) {
var otherCollName = this.getOutputCollPrefix(collName) + this.tid;
var cursor =
db[collName]
.aggregate([{$match: {flag: true}}, {$sort: {rand: 1}}, {$out: otherCollName}],
{allowDiskUse: true});
assertAlways.eq(0, cursor.itcount());
assertWhenOwnColl.eq(db[collName].find().itcount() / 2,
db[otherCollName].find().itcount());
};
$config.teardown = function teardown(db, collName, cluster) {
$super.teardown.apply(this, arguments);
// drop all collections with this workload's assumed-to-be-unique prefix
// NOTE: assumes the prefix contains no special regex chars
dropCollections(db, new RegExp('^' + this.getOutputCollPrefix(collName)));
};
return $config;
});
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