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//
// Tests autosplit locations with force : true, for small collections
//
var options = {
chunkSize: 1 // MB
};
var st = new ShardingTest({shards: 1, mongos: 1, other: options});
st.stopBalancer();
var mongos = st.s0;
var admin = mongos.getDB("admin");
var config = mongos.getDB("config");
var shardAdmin = st.shard0.getDB("admin");
var coll = mongos.getCollection("foo.bar");
assert(admin.runCommand({enableSharding: coll.getDB() + ""}).ok);
assert(admin.runCommand({shardCollection: coll + "", key: {_id: 1}}).ok);
assert(admin.runCommand({split: coll + "", middle: {_id: 0}}).ok);
jsTest.log("Insert a bunch of data into the low chunk of a collection," +
" to prevent relying on stats.");
var data128k = "x";
for (var i = 0; i < 7; i++)
data128k += data128k;
var bulk = coll.initializeUnorderedBulkOp();
for (var i = 0; i < 1024; i++) {
bulk.insert({_id: -(i + 1)});
}
assert.writeOK(bulk.execute());
jsTest.log("Insert 32 docs into the high chunk of a collection");
bulk = coll.initializeUnorderedBulkOp();
for (var i = 0; i < 32; i++) {
bulk.insert({_id: i});
}
assert.writeOK(bulk.execute());
jsTest.log("Split off MaxKey chunk...");
assert(admin.runCommand({split: coll + "", middle: {_id: 32}}).ok);
jsTest.log("Keep splitting chunk multiple times...");
st.printShardingStatus();
for (var i = 0; i < 5; i++) {
assert(admin.runCommand({split: coll + "", find: {_id: 0}}).ok);
st.printShardingStatus();
}
// Make sure we can't split further than 5 (2^5) times
assert(!admin.runCommand({split: coll + "", find: {_id: 0}}).ok);
var chunks = config.chunks.find({'min._id': {$gte: 0, $lt: 32}}).sort({min: 1}).toArray();
printjson(chunks);
// Make sure the chunks grow by 2x (except the first)
var nextSize = 1;
for (var i = 0; i < chunks.size; i++) {
assert.eq(coll.count({_id: {$gte: chunks[i].min._id, $lt: chunks[i].max._id}}), nextSize);
if (i != 0)
nextSize += nextSize;
}
st.stop();
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