67 lines
2.4 KiB
JavaScript
67 lines
2.4 KiB
JavaScript
// Test MapReduce output option replace into different db in a sharded environment.
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const st = new ShardingTest({shards: 2, mongos: 1});
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const sourceDB = st.s.getDB("mr_source_db");
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const destDB = st.s.getDB("mr_out_db");
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const sourceColl = sourceDB.mr_source_coll;
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sourceColl.drop();
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assert.commandWorked(
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st.s.adminCommand({enableSharding: sourceDB.getName(), primaryShard: st.shard0.name}));
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assert.commandWorked(
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st.s.adminCommand({enableSharding: destDB.getName(), primaryShard: st.shard0.name}));
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assert.commandWorked(sourceColl.insert({val: 1}));
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assert.commandWorked(sourceColl.insert({val: 2}));
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assert.commandWorked(sourceColl.createIndex({val: 1}));
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assert.commandWorked(st.s.adminCommand({shardCollection: sourceColl.getFullName(), key: {val: 1}}));
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assert.eq(2, sourceColl.find().count());
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function mapFunc() {
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emit(this.val, 1);
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}
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function reduceFunc(k, v) {
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return Array.sum(v);
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}
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const destColl = destDB.mr_out_coll;
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destColl.drop();
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assert.commandWorked(destColl.insert({val: 2}));
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let result = assert.commandWorked(sourceDB.runCommand({
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mapReduce: sourceColl.getName(),
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map: mapFunc,
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reduce: reduceFunc,
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out: {replace: destColl.getName(), db: destDB.getName()}
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}));
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assert.eq(2, destColl.find().count(), result);
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// Test that it works when the dbs are on different shards.
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destColl.drop();
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destDB.dropDatabase();
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assert.commandWorked(
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st.s.adminCommand({enableSharding: destDB.getName(), primaryShard: st.shard1.name}));
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result = assert.commandWorked(sourceDB.runCommand({
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mapReduce: sourceColl.getName(),
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map: mapFunc,
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reduce: reduceFunc,
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out: {replace: destColl.getName(), db: destDB.getName()}
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}));
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assert.eq(2, destColl.find().count(), result);
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// Test that it works when the dbs are on different shards and the destination collection has an
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// index.
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destColl.drop();
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destDB.createCollection(destColl.getName());
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assert.commandWorked(destColl.createIndex({val: 1}, {name: "test_index"}));
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result = assert.commandWorked(sourceDB.runCommand({
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mapReduce: sourceColl.getName(),
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map: mapFunc,
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reduce: reduceFunc,
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out: {replace: destColl.getName(), db: destDB.getName()}
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}));
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assert.eq(2, destColl.find().count(), result);
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const finalIndexes = assert.commandWorked(destDB.runCommand({"listIndexes": destColl.getName()}));
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const finalIndexesArray = new DBCommandCursor(destDB, finalIndexes).toArray();
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assert.eq(2, finalIndexesArray.length);
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st.stop(); |