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/**
* Check that doing updates done during a migrate all go to the right place
*
* This test is labeled resource intensive because its total io_write is 36MB compared to a median
* of 5MB across all sharding tests in wiredTiger.
* @tags: [resource_intensive]
*/
(function() {
var s = new ShardingTest({shards: 2, mongos: 1, other: {chunkSize: 1, enableAutoSplit: true}});
assert.commandWorked(s.s0.adminCommand({enablesharding: "test"}));
s.ensurePrimaryShard('test', s.shard1.shardName);
assert.commandWorked(s.s0.adminCommand({shardcollection: "test.foo", key: {_id: 1}}));
s.config.settings.find().forEach(printjson);
db = s.getDB("test");
bigString = "";
while (bigString.length < 10000)
bigString += "asdasdasdasdadasdasdasdasdasdasdasdasda";
N = 3000;
num = 0;
var counts = {};
//
// TODO: Rewrite to make much clearer.
//
// The core behavior of this test is to add a bunch of documents to a sharded collection, then
// incrementally update each document and make sure the counts in the document match our update
// counts while balancing occurs (doUpdate()). Every once in a while we also check (check())
// our counts via a query.
//
// If during a chunk migration an update is missed, we trigger an assertion and fail.
//
function doUpdate(bulk, includeString, optionalId) {
var up = {$inc: {x: 1}};
if (includeString) {
up["$set"] = {s: bigString};
}
var myid = optionalId == undefined ? Random.randInt(N) : optionalId;
bulk.find({_id: myid}).upsert().update(up);
counts[myid] = (counts[myid] ? counts[myid] : 0) + 1;
return myid;
}
Random.setRandomSeed();
// Initially update all documents from 1 to N, otherwise later checks can fail because no
// document previously existed
var bulk = db.foo.initializeUnorderedBulkOp();
for (i = 0; i < N; i++) {
doUpdate(bulk, true, i);
}
for (i = 0; i < N * 9; i++) {
doUpdate(bulk, false);
}
assert.commandWorked(bulk.execute());
for (var i = 0; i < 50; i++) {
s.printChunks("test.foo");
if (check("initial:" + i, true))
break;
sleep(5000);
}
check("initial at end");
assert.lt(20, s.config.chunks.count({"ns": "test.foo"}), "setup2");
function check(msg, dontAssert) {
for (var x in counts) {
var e = counts[x];
var z = db.foo.findOne({_id: parseInt(x)});
if (z && z.x == e)
continue;
if (dontAssert) {
if (z)
delete z.s;
print("not asserting for key failure: " + x + " want: " + e + " got: " + tojson(z));
return false;
}
s.s.getDB("admin").runCommand({setParameter: 1, logLevel: 2});
printjson(db.foo.findOne({_id: parseInt(x)}));
var y = db.foo.findOne({_id: parseInt(x)});
if (y) {
delete y.s;
}
s.printChunks("test.foo");
assert(z, "couldn't find : " + x + " y:" + tojson(y) + " e: " + e + " " + msg);
assert.eq(e, z.x, "count for : " + x + " y:" + tojson(y) + " " + msg);
}
return true;
}
var consecutiveNoProgressMadeErrors = 0;
function diff1() {
jsTest.log("Running diff1...");
var bulk = db.foo.initializeUnorderedBulkOp();
var myid = doUpdate(bulk, false);
var res = bulk.execute();
assert(res instanceof BulkWriteResult,
'Result from bulk.execute should be of type BulkWriteResult');
if (res.hasWriteErrors()) {
res.writeErrors.forEach(function(err) {
// Ignore up to 3 consecutive NoProgressMade errors for the cases where migration
// might be going faster than the writes are executing
if (err.code == ErrorCodes.NoProgressMade) {
consecutiveNoProgressMadeErrors++;
if (consecutiveNoProgressMadeErrors < 3) {
return;
}
}
assert.commandWorked(res);
});
} else {
consecutiveNoProgressMadeErrors = 0;
assert.eq(1,
res.nModified,
"diff myid: " + myid + " 2: " + res.toString() + "\n" +
" correct count is: " + counts[myid] +
" db says count is: " + tojson(db.foo.findOne({_id: myid})));
}
var x = s.chunkCounts("foo");
if (Math.random() > .999)
printjson(x);
return Math.max(x[s.shard0.shardName], x[s.shard1.shardName]) -
Math.min(x[s.shard0.shardName], x[s.shard1.shardName]);
}
assert.lt(20, diff1(), "initial load");
print(diff1());
s.startBalancer();
assert.soon(function() {
var d = diff1();
return d < 5;
}, "balance didn't happen", 1000 * 60 * 20, 1);
s.stop();
})();
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