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// Test balancing all chunks to one shard by tagging the full shard-key range on that collection
var s = new ShardingTest({ name: "balance_tags2",
shards: 3,
mongos: 1,
other: { chunkSize: 1,
enableBalancer : true } });
s.adminCommand({ enablesharding: "test" });
s.ensurePrimaryShard('test', 'shard0001');
var db = s.getDB("test");
var bulk = db.foo.initializeUnorderedBulkOp();
for (i = 0; i < 21; i++) {
bulk.insert({ _id: i, x: i });
}
assert.writeOK(bulk.execute());
sh.shardCollection("test.foo", { _id : 1 });
sh.stopBalancer();
for (i = 0; i < 20; i++) {
sh.splitAt("test.foo", {_id : i});
}
sh.startBalancer();
s.printShardingStatus(true);
// Wait for the initial balance to happen
assert.soon(function() {
var counts = s.chunkCounts("foo");
printjson(counts);
return counts["shard0000"] == 7 &&
counts["shard0001"] == 7 &&
counts["shard0002"] == 7;
},
"balance 1 didn't happen",
1000 * 60 * 10,
1000);
// Tag one shard
sh.addShardTag("shard0000" , "a");
assert.eq([ "a" ] , s.config.shards.findOne({ _id : "shard0000" }).tags);
// Tag the whole collection (ns) to one shard
sh.addTagRange("test.foo", { _id : MinKey }, { _id : MaxKey }, "a");
// Wait for things to move to that one shard
s.printShardingStatus(true);
assert.soon(function() {
var counts = s.chunkCounts("foo");
printjson(counts);
return counts["shard0001"] == 0 &&
counts["shard0002"] == 0;
},
"balance 2 didn't happen",
1000 * 60 * 10,
1000);
s.printShardingStatus(true);
s.stop();
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