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(function() {
var s = new ShardingTest({name: "find_and_modify_sharded", shards: 2});
s.adminCommand({enablesharding: "test"});
db = s.getDB("test");
s.ensurePrimaryShard('test', 'shard0001');
primary = s.getPrimaryShard("test").getDB("test");
secondary = s.getOther(primary).getDB("test");
numObjs = 20;
// Turn balancer off - with small numbers of chunks the balancer tries to correct all
// imbalances, not just < 8
s.s.getDB("config").settings.update({_id: "balancer"}, {$set: {stopped: true}}, true);
s.adminCommand({shardcollection: "test.stuff", key: {_id: 1}});
// pre-split the collection so to avoid interference from balancer
s.adminCommand({split: "test.stuff", middle: {_id: numObjs / 2}});
s.adminCommand(
{movechunk: "test.stuff", find: {_id: numObjs / 2}, to: secondary.getMongo().name});
var bulk = db.stuff.initializeUnorderedBulkOp();
for (var i = 0; i < numObjs; i++) {
bulk.insert({_id: i});
}
assert.writeOK(bulk.execute());
// put two docs in each chunk (avoid the split in 0, since there are no docs less than 0)
for (var i = 2; i < numObjs; i += 2) {
if (i == numObjs / 2)
continue;
s.adminCommand({split: "test.stuff", middle: {_id: i}});
}
s.printChunks();
assert.eq(numObjs / 2, s.config.chunks.count(), "split failed");
assert.eq(numObjs / 4, s.config.chunks.count({shard: "shard0000"}));
assert.eq(numObjs / 4, s.config.chunks.count({shard: "shard0001"}));
// update
for (var i = 0; i < numObjs; i++) {
assert.eq(db.stuff.count({b: 1}), i, "2 A");
var out = db.stuff.findAndModify({query: {_id: i, b: null}, update: {$set: {b: 1}}});
assert.eq(out._id, i, "2 E");
assert.eq(db.stuff.count({b: 1}), i + 1, "2 B");
}
// remove
for (var i = 0; i < numObjs; i++) {
assert.eq(db.stuff.count(), numObjs - i, "3 A");
assert.eq(db.stuff.count({_id: i}), 1, "3 B");
var out = db.stuff.findAndModify({remove: true, query: {_id: i}});
assert.eq(db.stuff.count(), numObjs - i - 1, "3 C");
assert.eq(db.stuff.count({_id: i}), 0, "3 D");
assert.eq(out._id, i, "3 E");
}
s.stop();
})();
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