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//
// Utilities for testing cleanupOrphaned command.
//
//
// Run cleanupOrphaned on a shard, and assert cleanupOrphaned runs the
// expected number of times before stopping.
//
function cleanupOrphaned(shardConnection, ns, expectedIterations) {
var admin = shardConnection.getDB('admin'),
result = admin.runCommand({cleanupOrphaned: ns}),
iterations = 1;
if (!result.ok) { printjson(result); }
assert(result.ok);
while (result.stoppedAtKey) {
result = admin.runCommand({
cleanupOrphaned: ns,
startingFromKey: result.stoppedAtKey
});
assert(result.ok);
++iterations;
}
assert.eq(iterations, expectedIterations, 'Expected to run ' +
'cleanupOrphaned' + expectedIterations + ' times, but it only ran ' +
iterations + ' times before stoppedAtKey was null.');
}
// Shards data from key range, then inserts orphan documents, runs cleanupOrphans
// and makes sure that orphans are removed.
// Pass an options object like:
// {
// shardKey: { a: 1, b: 1 },
// keyGen: function() { return [{ a: 'foo', b: 1 }, { a: 'bar', b: 2 }]; }
// }
function testCleanupOrphaned(options) {
var st = new ShardingTest({shards: 2, mongos: 2});
var mongos = st.s0,
admin = mongos.getDB('admin'),
shards = mongos.getCollection('config.shards').find().toArray(),
coll = mongos.getCollection('foo.bar'),
shard0Coll = st.shard0.getCollection(coll.getFullName()),
keys = options.keyGen(),
beginning = keys[0],
oneQuarter = keys[Math.round(keys.length / 4)],
middle = keys[Math.round(keys.length / 2)],
threeQuarters = keys[Math.round(3 * keys.length / 4)];
assert.commandWorked(admin.runCommand({
enableSharding: coll.getDB().getName()
}));
printjson( admin.runCommand({ movePrimary : coll.getDB() + "", to : shards[0]._id }) );
assert.commandWorked(admin.runCommand({
shardCollection: coll.getFullName(),
key: options.shardKey
}));
st.printShardingStatus();
jsTest.log('Inserting some regular docs...');
assert.commandWorked(admin.runCommand({
split: coll.getFullName(),
middle: middle
}));
assert.commandWorked(admin.runCommand({
moveChunk: coll.getFullName(),
find: middle,
to: shards[1]._id,
_waitForDelete: true
}));
for (var i = 0; i < keys.length; i++) coll.insert(keys[i]);
assert.eq(null, coll.getDB().getLastError());
// Half of the data is on each shard:
// shard 0: [beginning, middle)
// shard 1: [middle, end)
//
assert.eq(keys.length / 2, shard0Coll.count());
assert.eq(keys.length, coll.find().itcount());
jsTest.log('Inserting some orphaned docs...');
shard0Coll.insert(threeQuarters);
// I'll represent the orphan doc like {threeQuarters}, in this diagram:
//
// shard 0: [beginning, middle) {threeQuarters}
// shard 1: [middle, end)
assert.eq(null, shard0Coll.getDB().getLastError());
assert.eq(1 + keys.length / 2, shard0Coll.count());
jsTest.log('Cleaning up orphaned data...');
cleanupOrphaned(st.shard0, coll.getFullName(), 2);
assert.eq(keys.length / 2, shard0Coll.count());
assert.eq(keys.length, coll.find().itcount());
jsTest.log('Moving half the data out again (making a hole)...');
assert.commandWorked(admin.runCommand({
split: coll.getFullName(),
middle: oneQuarter
}));
assert.commandWorked(admin.runCommand({
moveChunk: coll.getFullName(),
find: beginning,
to: shards[1]._id,
_waitForDelete: true
}));
// 1/4 of the data is on the first shard.
// shard 0: [threeQuarters, middle)
// shard 1: [beginning, threeQuarters) [middle, end)
assert.eq(Math.round(keys.length / 4), shard0Coll.count());
assert.eq(keys.length, coll.find().itcount());
jsTest.log('Inserting some more orphaned docs...');
shard0Coll.insert(beginning);
shard0Coll.insert(middle);
assert.eq(null, shard0Coll.getDB().getLastError());
// shard 0: {beginning} [threeQuarters, middle) {middle}
// shard 1: [beginning, threeQuarters) [middle, end)
assert.eq(2 + Math.round(keys.length / 4), shard0Coll.count());
assert.eq(100, coll.find().itcount());
jsTest.log('Cleaning up more orphaned data...');
// Now cleanupOrphaned must iterate over 3 regions, not 2.
cleanupOrphaned(st.shard0, coll.getFullName(), 3);
assert.eq(Math.round(keys.length / 4), shard0Coll.count());
assert.eq(keys.length, coll.find().itcount());
jsTest.log('DONE!');
st.stop();
}
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