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s = new ShardingTest( "stats" , 2 , 1 , 1, { enableBalancer : 1 } );
s.adminCommand( { enablesharding : "test" } );
a = s._connections[0].getDB( "test" );
b = s._connections[1].getDB( "test" );
db = s.getDB( "test" );
s.ensurePrimaryShard('test', 'shard0001');
function numKeys(o){
var num = 0;
for (var x in o)
num++;
return num;
}
db.foo.drop();
assert.commandFailed(db.foo.stats(),
'db.collection.stats() should fail on non-existent collection');
// ---------- load some data -----
// need collections sharded before and after main collection for proper test
s.adminCommand( { shardcollection : "test.aaa" , key : { _id : 1 } } );
s.adminCommand( { shardcollection : "test.foo" , key : { _id : 1 } } ); // this collection is actually used
s.adminCommand( { shardcollection : "test.zzz" , key : { _id : 1 } } );
N = 10000;
s.adminCommand( { split : "test.foo" , middle : { _id : N/2 } } )
s.adminCommand({ moveChunk: "test.foo", find: { _id: 3 },
to: s.getNonPrimaries("test")[0], _waitForDelete: true });
var bulk = db.foo.initializeUnorderedBulkOp();
for ( i=0; i<N; i++ )
bulk.insert( { _id : i } );
assert.writeOK(bulk.execute());
x = db.foo.stats();
assert.eq( N , x.count , "coll total count expected" )
assert.eq( db.foo.count() , x.count , "coll total count match" )
assert.eq( 2 , x.nchunks , "coll chunk num" )
assert.eq( 2 , numKeys(x.shards) , "coll shard num" )
assert.eq( N / 2 , x.shards.shard0000.count , "coll count on shard0000 expected" )
assert.eq( N / 2 , x.shards.shard0001.count , "coll count on shard0001 expected" )
assert.eq( a.foo.count() , x.shards.shard0000.count , "coll count on shard0000 match" )
assert.eq( b.foo.count() , x.shards.shard0001.count , "coll count on shard0001 match" )
assert(!x.shards.shard0000.indexDetails,
'indexDetails should not be present in shard0000: ' + tojson(x.shards.shard0000));
assert(!x.shards.shard0001.indexDetails,
'indexDetails should not be present in shard0001: ' + tojson(x.shards.shard0001));
a_extras = a.stats().objects - a.foo.count(); // things like system.namespaces and system.indexes
b_extras = b.stats().objects - b.foo.count(); // things like system.namespaces and system.indexes
print("a_extras: " + a_extras);
print("b_extras: " + b_extras);
x = db.stats();
//dbstats uses Future::CommandResult so raw output uses connection strings not shard names
shards = Object.keySet(x.raw);
assert.eq( N + (a_extras + b_extras) , x.objects , "db total count expected" )
assert.eq( 2 , numKeys(x.raw) , "db shard num" )
assert.eq( (N / 2) + a_extras, x.raw[shards[0]].objects , "db count on shard0000 expected" )
assert.eq( (N / 2) + b_extras, x.raw[shards[1]].objects , "db count on shard0001 expected" )
assert.eq( a.stats().objects , x.raw[shards[0]].objects , "db count on shard0000 match" )
assert.eq( b.stats().objects , x.raw[shards[1]].objects , "db count on shard0001 match" )
/* Test db.stat() and db.collection.stat() scaling */
/* Helper functions */
function statComp(stat, stat_scaled, scale) {
/* Because of loss of floating point precision, do not check exact equality */
if ( stat == stat_scaled )
return true;
assert(((stat_scaled - 2) <= (stat / scale)) &&
((stat / scale) <= (stat_scaled + 2)));
}
function dbStatComp(stat_obj, stat_obj_scaled, scale) {
statComp(stat_obj.dataSize, stat_obj_scaled.dataSize, scale);
statComp(stat_obj.storageSize, stat_obj_scaled.storageSize, scale);
statComp(stat_obj.indexSize, stat_obj_scaled.indexSize, scale);
statComp(stat_obj.fileSize, stat_obj_scaled.fileSize, scale);
/* avgObjSize not scaled. See SERVER-7347 */
statComp(stat_obj.avgObjSize, stat_obj_scaled.avgObjSize, 1);
}
function collStatComp(stat_obj, stat_obj_scaled, scale, mongos) {
statComp(stat_obj.size, stat_obj_scaled.size, scale);
statComp(stat_obj.storageSize, stat_obj_scaled.storageSize, scale);
statComp(stat_obj.totalIndexSize, stat_obj_scaled.totalIndexSize, scale);
statComp(stat_obj.avgObjSize, stat_obj_scaled.avgObjSize, scale);
/* lastExtentSize doesn't exist in mongos level collection stats */
if (!mongos) {
statComp(stat_obj.lastExtentSize, stat_obj_scaled.lastExtentSize, scale);
}
}
/* db.stats() tests */
db_not_scaled = db.stats();
db_scaled_512 = db.stats(512);
db_scaled_1024 = db.stats(1024);
for (var shard in db_not_scaled.raw) {
dbStatComp(db_not_scaled.raw[shard], db_scaled_512.raw[shard], 512);
dbStatComp(db_not_scaled.raw[shard], db_scaled_1024.raw[shard], 1024);
}
dbStatComp(db_not_scaled, db_scaled_512, 512);
dbStatComp(db_not_scaled, db_scaled_1024, 1024);
/* db.collection.stats() tests */
coll_not_scaled = db.foo.stats();
coll_scaled_512 = db.foo.stats(512);
coll_scaled_1024 = db.foo.stats(1024);
for (var shard in coll_not_scaled.shards) {
collStatComp(coll_not_scaled.shards[shard], coll_scaled_512.shards[shard], 512, false);
collStatComp(coll_not_scaled.shards[shard], coll_scaled_1024.shards[shard], 1024, false);
}
collStatComp(coll_not_scaled, coll_scaled_512, 512, true);
collStatComp(coll_not_scaled, coll_scaled_1024, 1024, true);
/* db.collection.stats() - indexDetails tests */
(function() {
var t = db.foo;
assert.commandWorked(t.ensureIndex({a: 1}));
assert.eq(2, t.getIndexes().length);
var isWiredTiger = (!jsTest.options().storageEngine
|| jsTest.options().storageEngine === "wiredTiger");
var stats = assert.commandWorked(t.stats({indexDetails: true}));
var shardName;
var shardStats;
for (shardName in stats.shards) {
shardStats = stats.shards[shardName];
assert(shardStats.indexDetails,
'indexDetails missing for ' + shardName + ': ' + tojson(shardStats));
if (isWiredTiger) {
assert.eq(t.getIndexes().length, Object.keys(shardStats.indexDetails).length,
'incorrect number of entries in WiredTiger indexDetails: ' +
tojson(shardStats));
}
}
function getIndexName(indexKey) {
var indexes = t.getIndexes().filter(function(doc) {
return friendlyEqual(doc.key, indexKey);
});
assert.eq(1, indexes.length, tojson(indexKey) + ' not found in getIndexes() result: ' +
tojson(t.getIndexes()));
return indexes[0].name;
}
function checkIndexDetails(options, indexName) {
var stats = assert.commandWorked(t.stats(options));
for (shardName in stats.shards) {
shardStats = stats.shards[shardName];
assert(shardStats.indexDetails,
'indexDetails missing from db.collection.stats(' + tojson(options) +
').shards[' + shardName + '] result: ' + tojson(shardStats));
// Currently, indexDetails is only supported with WiredTiger.
if (isWiredTiger) {
assert.eq(1, Object.keys(shardStats.indexDetails).length,
'WiredTiger indexDetails must have exactly one entry');
assert(shardStats.indexDetails[indexName],
indexName + ' missing from WiredTiger indexDetails: ' +
tojson(shardStats.indexDetails));
assert.neq(0, Object.keys(shardStats.indexDetails[indexName]).length,
indexName + ' exists in indexDetails but contains no information: ' +
tojson(shardStats.indexDetails));
}
}
}
// indexDetailsKey - show indexDetails results for this index key only.
var indexKey = {a: 1};
var indexName = getIndexName(indexKey);
checkIndexDetails({indexDetails: true, indexDetailsKey: indexKey}, indexName);
// indexDetailsName - show indexDetails results for this index name only.
checkIndexDetails({indexDetails: true, indexDetailsName: indexName}, indexName);
}());
s.stop()
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