98 lines
3.6 KiB
JavaScript
98 lines
3.6 KiB
JavaScript
'use strict';
|
|
|
|
/**
|
|
* update_simple.js
|
|
*
|
|
* Creates several docs. On each iteration, each thread chooses:
|
|
* - a random doc
|
|
* - whether to $set or $unset its field
|
|
* - what value to $set the field to
|
|
*/
|
|
|
|
// For isMongod and supportsDocumentLevelConcurrency.
|
|
load('jstests/concurrency/fsm_workload_helpers/server_types.js');
|
|
|
|
var $config = (function() {
|
|
|
|
var states = {
|
|
set: function set(db, collName) {
|
|
this.setOrUnset(db, collName, true, this.numDocs);
|
|
},
|
|
|
|
unset: function unset(db, collName) {
|
|
this.setOrUnset(db, collName, false, this.numDocs);
|
|
}
|
|
};
|
|
|
|
var transitions = {set: {set: 0.5, unset: 0.5}, unset: {set: 0.5, unset: 0.5}};
|
|
|
|
function setup(db, collName, cluster) {
|
|
// index on 'value', the field being updated
|
|
assertAlways.commandWorked(db[collName].ensureIndex({value: 1}));
|
|
|
|
// numDocs should be much less than threadCount, to make more threads use the same docs.
|
|
this.numDocs = Math.floor(this.threadCount / 5);
|
|
assertAlways.gt(this.numDocs, 0, 'numDocs should be a positive number');
|
|
|
|
for (var i = 0; i < this.numDocs; ++i) {
|
|
// make sure the inserted docs have a 'value' field, so they won't need
|
|
// to grow when this workload runs against a capped collection
|
|
var res = db[collName].insert({_id: i, value: 0});
|
|
assertWhenOwnColl.writeOK(res);
|
|
assertWhenOwnColl.eq(1, res.nInserted);
|
|
}
|
|
}
|
|
|
|
return {
|
|
threadCount: 20,
|
|
iterations: 20,
|
|
startState: 'set',
|
|
states: states,
|
|
transitions: transitions,
|
|
data: {
|
|
// explicitly pass db to avoid accidentally using the global `db`
|
|
assertResult: function assertResult(db, res) {
|
|
assertAlways.eq(0, res.nUpserted, tojson(res));
|
|
|
|
if (isMongod(db) && supportsDocumentLevelConcurrency(db)) {
|
|
// Storage engines which support document-level concurrency will automatically
|
|
// retry any operations when there are conflicts, so we should always see a
|
|
// matching document.
|
|
assertWhenOwnColl.eq(res.nMatched, 1, tojson(res));
|
|
} else {
|
|
// On storage engines that do not support document-level concurrency, it is
|
|
// possible that the query will not find the document. This can happen if
|
|
// another thread updated the target document during a yield, triggering an
|
|
// invalidation.
|
|
assertWhenOwnColl.contains(res.nMatched, [0, 1], tojson(res));
|
|
}
|
|
|
|
// We can't be sure nModified will be non-zero because we may have just set a key to
|
|
// its existing value
|
|
if (db.getMongo().writeMode() === 'commands') {
|
|
assertWhenOwnColl.contains(res.nModified, [0, 1], tojson(res));
|
|
}
|
|
},
|
|
|
|
setOrUnset: function setOrUnset(db, collName, set, numDocs) {
|
|
// choose a doc and value to use in the update
|
|
var docIndex = Random.randInt(numDocs);
|
|
var value = Random.randInt(5);
|
|
|
|
var updater = {};
|
|
updater[set ? '$set' : '$unset'] = {value: value};
|
|
|
|
var query = {_id: docIndex};
|
|
var res = this.doUpdate(db, collName, query, updater);
|
|
this.assertResult(db, res);
|
|
},
|
|
|
|
doUpdate: function doUpdate(db, collName, query, updater) {
|
|
return db[collName].update(query, updater);
|
|
},
|
|
},
|
|
setup: setup
|
|
};
|
|
|
|
})();
|