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'use strict';
/**
* rename_collection_dbname_chain.js
*
* Creates a collection and then repeatedly executes the renameCollection
* command against it, specifying a different database name in the namespace.
* The previous "to" namespace is used as the next "from" namespace.
*/
load('jstests/concurrency/fsm_workload_helpers/drop_utils.js'); // for dropDatabases
var $config = (function() {
var data = {
// Use the workload name as a prefix for the collection name,
// since the workload name is assumed to be unique.
prefix: 'rename_collection_dbname_chain'
};
var states = (function() {
function uniqueDBName(prefix, tid, num) {
return prefix + tid + '_' + num;
}
function init(db, collName) {
this.fromDBName = db.getName() + uniqueDBName(this.prefix, this.tid, 0);
this.num = 1;
var fromDB = db.getSiblingDB(this.fromDBName);
assertAlways.commandWorked(fromDB.createCollection(collName));
}
function rename(db, collName) {
var toDBName = db.getName() + uniqueDBName(this.prefix, this.tid, this.num++);
var renameCommand = {
renameCollection: this.fromDBName + '.' + collName,
to: toDBName + '.' + collName,
dropTarget: false
};
assertAlways.commandWorked(db.adminCommand(renameCommand));
// Remove any files associated with the "from" namespace
// to avoid having too many files open
var res = db.getSiblingDB(this.fromDBName).dropDatabase();
assertAlways.commandWorked(res);
assertAlways.eq(this.fromDBName, res.dropped);
this.fromDBName = toDBName;
}
return {init: init, rename: rename};
})();
var transitions = {init: {rename: 1}, rename: {rename: 1}};
function teardown(db, collName, cluster) {
var pattern = new RegExp('^' + db.getName() + this.prefix + '\\d+_\\d+$');
dropDatabases(db, pattern);
}
return {
threadCount: 10,
// We only run a few iterations to reduce the amount of data cumulatively
// written to disk by mmapv1. For example, setting 10 threads and 5
// iterations causes this workload to write at least 32MB (.ns and .0 files)
// * 10 threads * 5 iterations worth of data to disk, which can be slow on
// test hosts.
iterations: 5,
data: data,
states: states,
transitions: transitions,
teardown: teardown
};
})();
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