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/**
* Tests using different combinations of --wiredTigerCollectionBlockCompressor and
* --wiredTigerJournalCompressor.
*
* Using the collection block compressor option will result in all new collections made during
* that process lifetime to use that compression setting. WiredTiger perfectly supports different
* tables using different block compressors. This test will start up MongoDB once for each block
* compressor setting and a create a new collection. Then after all collections are created, check
* creation string passed to WT via the collStats command.
*
* WiredTiger also supports changing the compression setting for writes to the journal. This tests
* that the setting can be changed between clean restarts, but otherwise does not verify the
* journal compression behavior.
*
* @tags: [requires_persistence,requires_wiredtiger]
*/
(function() {
'use strict';
// On the first iteration, start a mongod. Subsequent iterations will close and restart on the
// same dbpath.
let firstIteration = true;
let compressors = ['none', 'snappy', 'zlib', 'zstd'];
let mongo;
for (let compressor of compressors) {
jsTestLog({"Starting with compressor": compressor});
if (firstIteration) {
mongo = MongoRunner.runMongod({
wiredTigerCollectionBlockCompressor: compressor,
wiredTigerJournalCompressor: compressor
});
firstIteration = false;
} else {
MongoRunner.stopMongod(mongo);
mongo = MongoRunner.runMongod({
restart: true,
dbpath: mongo.dbpath,
cleanData: false,
wiredTigerCollectionBlockCompressor: compressor
});
}
mongo.getDB('db')[compressor].insert({});
}
for (let compressor of compressors) {
jsTestLog({"Asserting collection compressor": compressor});
let stats = mongo.getDB('db')[compressor].stats();
assert(stats['wiredTiger']['creationString'].search('block_compressor=' + compressor) > -1);
}
MongoRunner.stopMongod(mongo);
}());
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