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'use strict';
/**
* create_index_background.js
*
* Create an index in the background while performing CRUD operations at the same time.
* The command to create a background index completes in the shell once the
* index has completed and the test no longer needs to execute more transitions.
* The first thread (tid = 0) will be the one that creates the background index.
*/
load('jstests/concurrency/fsm_workload_helpers/server_types.js'); // for isMongos
var $config = (function() {
var data = {
nDocumentsToSeed: 1000,
nDocumentsToCreate: 200,
nDocumentsToRead: 100,
nDocumentsToUpdate: 50,
nDocumentsToDelete: 50,
getHighestX: function getHighestX(coll, tid) {
// Find highest value of x.
var highest = 0;
var cursor = coll.find({tid: tid}).sort({x: -1}).limit(-1);
assertWhenOwnColl(function() {
highest = cursor.next().x;
});
return highest;
}
};
var states = (function() {
function init(db, collName) {
// Add thread-specific documents
var bulk = db[collName].initializeUnorderedBulkOp();
for (var i = 0; i < this.nDocumentsToSeed; ++i) {
bulk.insert({x: i, tid: this.tid});
}
var res = bulk.execute();
assertAlways.writeOK(res);
assertAlways.eq(this.nDocumentsToSeed, res.nInserted, tojson(res));
// In the first thread create the background index.
if (this.tid === 0) {
var coll = db[collName];
// Before creating the background index make sure insert or update
// CRUD operations are active.
assertWhenOwnColl.soon(function() {
return coll.find({crud: {$exists: true}}).itcount() > 0;
}, 'No documents with "crud" field have been inserted or updated', 60 * 1000);
res = coll.ensureIndex({x: 1}, {background: true});
assertAlways.commandWorked(res, tojson(res));
}
}
function createDocs(db, collName) {
// Insert documents with an increasing value of index x.
var coll = db[collName];
var res;
var count = coll.find({tid: this.tid}).itcount();
var highest = this.getHighestX(coll, this.tid);
for (var i = 0; i < this.nDocumentsToCreate; ++i) {
res = coll.insert({x: i + highest + 1, tid: this.tid, crud: 1});
assertAlways.writeOK(res);
assertAlways.eq(res.nInserted, 1, tojson(res));
}
assertWhenOwnColl.eq(coll.find({tid: this.tid}).itcount(),
this.nDocumentsToCreate + count,
'createDocs itcount mismatch');
}
function readDocs(db, collName) {
// Read random documents from the collection on index x.
var coll = db[collName];
var res;
var count = coll.find({tid: this.tid}).itcount();
assertWhenOwnColl.gte(
count, this.nDocumentsToRead, 'readDocs not enough documents for tid ' + this.tid);
var highest = this.getHighestX(coll, this.tid);
for (var i = 0; i < this.nDocumentsToRead; ++i) {
// Do randomized reads on index x. A document is not guaranteed
// to match the randomized 'x' predicate.
res = coll.find({x: Random.randInt(highest), tid: this.tid}).itcount();
assertWhenOwnColl.contains(res, [0, 1], tojson(res));
}
assertWhenOwnColl.eq(
coll.find({tid: this.tid}).itcount(), count, 'readDocs itcount mismatch');
}
function updateDocs(db, collName) {
// Update random documents from the collection on index x.
// Since an update requires a shard key, do not run in a sharded cluster.
if (!isMongos(db)) {
var coll = db[collName];
var res;
var count = coll.find({tid: this.tid}).itcount();
assertWhenOwnColl.gte(count,
this.nDocumentsToUpdate,
'updateDocs not enough documents for tid ' + this.tid);
var highest = this.getHighestX(coll, this.tid);
for (var i = 0; i < this.nDocumentsToUpdate; ++i) {
// Do randomized updates on index x. A document is not guaranteed
// to match the randomized 'x' predicate.
res = coll.update({x: Random.randInt(highest), tid: this.tid},
{$inc: {crud: 1}});
assertAlways.writeOK(res);
if (db.getMongo().writeMode() === 'commands') {
assertWhenOwnColl.contains(res.nModified, [0, 1], tojson(res));
}
assertWhenOwnColl.contains(res.nMatched, [0, 1], tojson(res));
assertWhenOwnColl.eq(res.nUpserted, 0, tojson(res));
}
assertWhenOwnColl.eq(
coll.find({tid: this.tid}).itcount(), count, 'updateDocs itcount mismatch');
}
}
function deleteDocs(db, collName) {
// Remove random documents from the collection on index x.
var coll = db[collName];
var res;
var count = coll.find({tid: this.tid}).itcount();
// Set the maximum number of documents we can delete to ensure that there
// are documents to read or update after deleteDocs completes.
// Return from this state if there are not enough documents in the collection
// with this.tid.
var minDocsToKeep = Math.max(this.nDocumentsToRead, this.nDocumentsToUpdate);
// nDeleteDocs is the number of documents that can be deleted during this state.
var nDeleteDocs = Math.min(count - minDocsToKeep, this.nDocumentsToDelete);
if (nDeleteDocs < 0) {
return;
}
var highest = this.getHighestX(coll, this.tid);
var nActualDeletes = 0;
for (var i = 0; i < nDeleteDocs; ++i) {
// Do randomized deletes on index x. A document is not guaranteed
// to match the randomized 'x' predicate.
res = coll.remove({x: Random.randInt(highest), tid: this.tid});
assertAlways.writeOK(res);
assertWhenOwnColl.contains(res.nRemoved, [0, 1], tojson(res));
nActualDeletes += res.nRemoved;
}
assertWhenOwnColl.eq(coll.find({tid: this.tid}).itcount(),
count - nActualDeletes,
'deleteDocs itcount mismatch');
}
return {
init: init,
createDocs: createDocs,
readDocs: readDocs,
updateDocs: updateDocs,
deleteDocs: deleteDocs
};
})();
var transitions = {
init: {createDocs: 1},
createDocs: {createDocs: 0.25, readDocs: 0.25, updateDocs: 0.25, deleteDocs: 0.25},
readDocs: {createDocs: 0.25, readDocs: 0.25, updateDocs: 0.25, deleteDocs: 0.25},
updateDocs: {createDocs: 0.25, readDocs: 0.25, updateDocs: 0.25, deleteDocs: 0.25},
deleteDocs: {createDocs: 0.25, readDocs: 0.25, updateDocs: 0.25, deleteDocs: 0.25},
};
var internalQueryExecYieldIterations;
var internalQueryExecYieldPeriodMS;
function setup(db, collName, cluster) {
var nSetupDocs = this.nDocumentsToSeed * 200;
var coll = db[collName];
var res = coll.ensureIndex({tid: 1});
assertAlways.commandWorked(res, tojson(res));
var bulk = coll.initializeUnorderedBulkOp();
for (var i = 0; i < nSetupDocs; ++i) {
bulk.insert({x: i});
}
res = bulk.execute();
assertAlways.writeOK(res);
assertAlways.eq(nSetupDocs, res.nInserted, tojson(res));
// Increase the following parameters to reduce the number of yields.
cluster.executeOnMongodNodes(function(db) {
var res;
res = db.adminCommand({setParameter: 1, internalQueryExecYieldIterations: 100000});
assertAlways.commandWorked(res);
internalQueryExecYieldIterations = res.was;
res = db.adminCommand({setParameter: 1, internalQueryExecYieldPeriodMS: 10000});
assertAlways.commandWorked(res);
internalQueryExecYieldPeriodMS = res.was;
});
}
function teardown(db, collName, cluster) {
cluster.executeOnMongodNodes(function(db) {
assertAlways.commandWorked(db.adminCommand({
setParameter: 1,
internalQueryExecYieldIterations: internalQueryExecYieldIterations
}));
assertAlways.commandWorked(db.adminCommand({
setParameter: 1,
internalQueryExecYieldPeriodMS: internalQueryExecYieldPeriodMS
}));
});
}
return {
threadCount: 5,
iterations: 3,
data: data,
states: states,
setup: setup,
teardown: teardown,
transitions: transitions,
};
})();
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