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'use strict';
/**
* Creates a time-series collection with a short expireAfterSeconds value. Each thread does an
* insert on each iteration with a time, a metadata field, 'tid', and random measurement, 'data'. At
* the end, we wait until the first set of documents has been deleted.
*
* @tags: [
* assumes_no_implicit_collection_creation_after_drop,
* does_not_support_stepdowns,
* requires_timeseries,
* uses_ttl,
* ]
*/
var $config = (function() {
const initData = {
getCollectionName: function(collName) {
return "insert_ttl_timeseries_" + collName;
},
getCollection: function(db, collName) {
return db.getCollection(this.getCollectionName(collName));
},
};
const timeFieldName = "time";
const metaFieldName = "tid";
const ttlSeconds = 3;
const defaultBucketMaxRangeMs = 3600 * 1000;
const batchSize = 10;
// Generates a time in the past that will be expired soon. TTL for time-series collections only
// expires buckets once the bucket minimum is past the maximum range of the bucket size, in this
// case one hour.
const getTime = function() {
const now = new Date();
return new Date(now.getTime() - defaultBucketMaxRangeMs);
};
const states = {
init: function init(db, collName) {
const coll = this.getCollection(db, collName);
const res = coll.insert({
[metaFieldName]: this.tid,
[timeFieldName]: getTime(),
first: true,
});
assertAlways.commandWorked(res);
assertAlways.eq(1, res.nInserted, tojson(res));
},
/**
* Insert a single measurement for the current thread id.
*/
insertOne: function insertOne(db, collName) {
const coll = this.getCollection(db, collName);
const res = coll.insert({
[metaFieldName]: this.tid,
[timeFieldName]: getTime(),
data: Random.rand(),
});
assertAlways.commandWorked(res);
assertAlways.eq(1, res.nInserted, tojson(res));
},
/**
* Insert an ordered batch for the current thread id. All measurements should end up in the
* same bucket.
*/
insertManyOrdered: function insertManyOrdered(db, collName) {
const coll = this.getCollection(db, collName);
const docs = [];
for (let i = 0; i < batchSize; i++) {
docs.push({
[metaFieldName]: this.tid,
[timeFieldName]: getTime(),
data: Random.rand(),
});
}
const res = coll.insertMany(docs, {ordered: true});
assertAlways.commandWorked(res);
assertAlways.eq(res.insertedIds.length, batchSize);
},
/**
* Insert an unordered batch for a specific thread id. All measurements should end up in
* the same bucket.
*/
insertManyUnordered: function insertManyUnordered(db, collName) {
const coll = this.getCollection(db, collName);
const docs = [];
for (let i = 0; i < batchSize; i++) {
docs.push({
[metaFieldName]: this.tid,
[timeFieldName]: getTime(),
data: Random.rand(),
});
}
const res = coll.insertMany(docs, {ordered: false});
assertAlways.commandWorked(res);
assertAlways.eq(res.insertedIds.length, batchSize);
},
/**
* Writers are not restricted to insert documents for their thread id. Insert a batch with
* randomized thread ids to exercise the case where a batch insert results in writes to
* several different buckets.
*/
insertManyRandTid: function insertManyRandTid(db, collName) {
const coll = this.getCollection(db, collName);
const docs = [];
for (let i = 0; i < batchSize; i++) {
docs.push({
[metaFieldName]: Random.randInt(this.threadCount),
[timeFieldName]: getTime(),
data: Random.rand(),
});
}
const res = coll.insertMany(docs, {ordered: false});
assertAlways.commandWorked(res);
assertAlways.eq(res.insertedIds.length, batchSize);
},
/**
* Insert a batch for the current thread id but with older times that should be inserted in
* different buckets.
*/
insertManyOld: function insertManyOld(db, collName) {
const coll = this.getCollection(db, collName);
const docs = [];
const start = getTime();
for (let i = 0; i < batchSize; i++) {
let time = new Date(start.getTime() - ((batchSize - i) * defaultBucketMaxRangeMs));
docs.push({
[metaFieldName]: this.tid,
[timeFieldName]: time,
data: Random.rand(),
});
}
const res = coll.insertMany(docs, {ordered: false});
assertAlways.commandWorked(res);
assertAlways.eq(res.insertedIds.length, batchSize);
}
};
function setup(db, collName, cluster) {
collName = this.getCollectionName(collName);
assertAlways.commandWorked(db.createCollection(collName, {
timeseries: {
timeField: timeFieldName,
metaField: metaFieldName,
},
expireAfterSeconds: ttlSeconds,
}));
}
function teardown(db, collName, cluster) {
// Default TTL monitor period
const ttlMonitorSleepSecs = 60;
// We need to wait for the initial documents to expire. It's possible for this code to
// run right after the TTL thread has started to sleep, which requires us to wait another
// period for it to wake up and delete the expired documents. We wait at least another
// period just to avoid race-prone tests on overloaded test hosts.
const timeoutMS =
(TestData.inEvergreen ? 10 : 2) * Math.max(ttlMonitorSleepSecs, ttlSeconds) * 1000;
print("Waiting for data to be deleted by TTL monitor");
collName = this.getCollectionName(collName);
assertAlways.soon(() => {
return db[collName].find({first: true}).itcount() == 0;
}, 'Expected oldest documents to be removed', timeoutMS);
}
const standardTransition = {
insertOne: 0.4,
insertManyOrdered: 0.1,
insertManyUnordered: 0.1,
insertManyRandTid: 0.1,
insertManyOld: 0.1
};
const transitions = {
init: standardTransition,
insertOne: standardTransition,
insertManyOrdered: standardTransition,
insertManyUnordered: standardTransition,
insertManyRandTid: standardTransition,
insertManyOld: standardTransition,
};
return {
threadCount: 20,
iterations: 150,
startState: 'init',
states: states,
data: initData,
transitions: transitions,
setup: setup,
teardown: teardown
};
})();
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