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/**
* Tests parsing and validation of compression options for column store indexes.
* @tags: [
* # The $collStats stage is not supported inside a transaction.
* does_not_support_transactions,
* requires_collstats,
*
* # Column store indexes are still under a feature flag and require full SBE.
* uses_column_store_index,
* featureFlagColumnstoreIndexes,
* featureFlagSbeFull,
*
* # In passthrough suites, this test makes direct connections to mongod instances that compose
* # the passthrough fixture in order to perform additional validation. Tenant migration,
* # alternate read concern values, and step downs can cause these connections to fail.
* tenant_migration_incompatible,
* assumes_read_concern_unchanged,
* assumes_read_preference_unchanged,
* does_not_support_stepdowns,
* ]
*/
(function() {
"use strict";
load("jstests/libs/columnstore_util.js"); // For setUpServerForColumnStoreIndexTest.
load("jstests/libs/discover_topology.js"); // For findNonConfigNodes
load("jstests/libs/fixture_helpers.js"); // For isMongos
load("jstests/libs/index_catalog_helpers.js"); // For IndexCatalogHelpers
load("jstests/libs/sbe_util.js"); // For checkSBEEnabled.
const columnstoreEnabled = checkSBEEnabled(
db, ["featureFlagColumnstoreIndexes", "featureFlagSbeFull"], true /* checkAllNodes */);
if (!columnstoreEnabled) {
jsTestLog("Skipping columnstore index test since the feature flag is not enabled.");
return;
}
if (!setUpServerForColumnStoreIndexTest(db)) {
return;
}
const coll = db.column_store_index_compression;
coll.drop();
/**
* The IndexStatsReader connects to each mongod in a fixture (standalone, replica set, or sharded
* cluster) so that we can verify index properties that we want to hold for all data-bearing nodes.
*/
class IndexStatsReader {
constructor() {
this.connections = {};
}
static openConnectionToMongod(node) {
const conn = new Mongo(node);
conn.setSecondaryOk();
return !FixtureHelpers.isMongos(conn.getDB("admin")) ? conn : false;
}
/**
* Poll the list of indexes from the given collection in 'remoteDB' until it contains a desired
* index _and_ that index is ready. Ready indexes do not have a "buildUUID" field.
*/
static assertIndexReadySoon(remoteDB, collectionName, indexName) {
assert.soon(() => {
const indexResult = assert.commandWorked(
remoteDB.runCommand({listIndexes: collectionName, includeBuildUUIDs: true}));
return indexResult.cursor.firstBatch.findIndex(
indexSpec =>
(indexSpec.name === indexName && !("buildUUID" in indexSpec))) >= 0;
});
}
* statsForEachMongod(collection, indexName) {
let nonConfigNodes;
assert.soon(() => {
nonConfigNodes = DiscoverTopology.findNonConfigNodes(collection.getDB().getMongo());
return nonConfigNodes.length > 0;
});
for (let node of nonConfigNodes) {
const conn = this.connections[node] ||
(this.connections[node] = IndexStatsReader.openConnectionToMongod(node));
if (conn) {
const remoteDB = conn.getDB(collection.getDB().getName());
// Wait until the index is done building and all its data is synced to disk.
IndexStatsReader.assertIndexReadySoon(remoteDB, collection.getName(), indexName);
assert.commandWorked(db.adminCommand({fsync: 1}));
const collStats = remoteDB[collection.getName()]
.aggregate([{$collStats: {storageStats: {}}}])
.next();
yield {node, indexDetails: collStats.storageStats.indexDetails[indexName]};
}
}
}
}
const reader = new IndexStatsReader();
function parseCompressorFromCreationString(creationString) {
const [[_, compressorName], ...additionalMatches] =
[...creationString.matchAll(/(?:^|,)block_compressor=(\w*)/g)];
// There should not be more than one block_compressor value defined in the creation string.
assert.eq(additionalMatches.length, 0, creationString);
return compressorName;
}
// Test that specifying a fictional compression module fails.
assert.commandFailedWithCode(IndexCatalogHelpers.createSingleIndex(
coll,
{"$**": "columnstore"},
{name: "three_comma_index", columnstoreCompressor: "middleout"}),
ErrorCodes.InvalidIndexSpecificationOption);
// Test that the column store indexes are created with Zstandard block compression by default.
const defaultIndex = "index_with_default_compression";
IndexCatalogHelpers.createIndexAndVerifyWithDrop(
coll, {"$**": "columnstore"}, {name: defaultIndex});
for (let {node, indexDetails} of reader.statsForEachMongod(coll, defaultIndex)) {
assert.eq(parseCompressorFromCreationString(indexDetails.creationString),
"zstd",
{node, indexDetails});
}
// Test creation of a column store with Zlib block compression.
const zlibIndex = "index_with_zlib_compression";
IndexCatalogHelpers.createIndexAndVerifyWithDrop(
coll, {"$**": "columnstore"}, {name: zlibIndex, columnstoreCompressor: "zlib"});
for (let {node, indexDetails} of reader.statsForEachMongod(coll, zlibIndex)) {
assert.eq(parseCompressorFromCreationString(indexDetails.creationString),
"zlib",
{node, indexDetails});
}
// Test creation of a column store with Snappy block compression.
const snappyIndex = "index_with_snappy_compression";
IndexCatalogHelpers.createIndexAndVerifyWithDrop(
coll, {"$**": "columnstore"}, {name: snappyIndex, columnstoreCompressor: "snappy"});
for (let {node, indexDetails} of reader.statsForEachMongod(coll, snappyIndex)) {
assert.eq(parseCompressorFromCreationString(indexDetails.creationString),
"snappy",
{node, indexDetails});
}
// Add some documents so we can test that index builds succeed both with and without compression.
const kNumDocuments = 32;
const approxUncompressedSize = kNumDocuments * 1024 * 1024;
for (let i = 0; i < kNumDocuments; i++) {
// Insert a ~1MB document.
assert.commandWorked(
coll.insert({_id: i, payload: i.toString().padStart(2, "0").repeat(1024 * 1024 / 2)}));
}
// Test creation of a column store with block compression explicitly disabled.
const rawIndex = "index_without_compression";
IndexCatalogHelpers.createIndexAndVerifyWithDrop(
coll, {"$**": "columnstore"}, {name: rawIndex, columnstoreCompressor: "none"});
for (let {node, indexDetails} of reader.statsForEachMongod(coll, rawIndex)) {
assert.eq(parseCompressorFromCreationString(indexDetails.creationString),
"none",
{node, indexDetails});
}
// Test creation of a column store with Zstandard block compression explicitly specified.
const zstdIndex = "index_with_zstd_compression";
IndexCatalogHelpers.createIndexAndVerifyWithDrop(
coll, {"$**": "columnstore"}, {name: zstdIndex, columnstoreCompressor: "zstd"});
for (let {node, indexDetails} of reader.statsForEachMongod(coll, zstdIndex)) {
assert.eq(parseCompressorFromCreationString(indexDetails.creationString),
"zstd",
{node, indexDetails});
}
}());
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