summaryrefslogtreecommitdiff
path: root/jstests/sharding/stats.js
blob: 52ec40556d73e9d8e321623344de8a51b6f62197 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
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()