void ChunkManager::createFirstChunks(OperationContext* txn,
const ShardId& primaryShardId,
const vector<BSONObj>* initPoints,
const set<ShardId>* initShardIds) {
// TODO distlock?
// TODO: Race condition if we shard the collection and insert data while we split across
// the non-primary shard.
vector<BSONObj> splitPoints;
vector<ShardId> shardIds;
calcInitSplitsAndShards(txn, primaryShardId, initPoints, initShardIds, &splitPoints, &shardIds);
// this is the first chunk; start the versioning from scratch
ChunkVersion version;
version.incEpoch();
version.incMajor();
log() << "going to create " << splitPoints.size() + 1 << " chunk(s) for: " << _ns
<< " using new epoch " << version.epoch();
for (unsigned i = 0; i <= splitPoints.size(); i++) {
BSONObj min = i == 0 ? _keyPattern.getKeyPattern().globalMin() : splitPoints[i - 1];
BSONObj max =
i < splitPoints.size() ? splitPoints[i] : _keyPattern.getKeyPattern().globalMax();
Chunk temp(this, min, max, shardIds[i % shardIds.size()], version);
BSONObjBuilder chunkBuilder;
temp.serialize(chunkBuilder);
BSONObj chunkObj = chunkBuilder.obj();
Status result = grid.catalogManager(txn)->update(txn,
ChunkType::ConfigNS,
BSON(ChunkType::name(temp.genID())),
chunkObj,
true,
false,
NULL);
version.incMinor();
if (!result.isOK()) {
string ss = str::stream()
<< "creating first chunks failed. result: " << result.reason();
error() << ss;
msgasserted(15903, ss);
}
}
_version = ChunkVersion(0, 0, version.epoch());
}
Status ChunkManager::createFirstChunks(OperationContext* txn,
const ShardId& primaryShardId,
const vector<BSONObj>* initPoints,
const set<ShardId>* initShardIds) {
// TODO distlock?
// TODO: Race condition if we shard the collection and insert data while we split across
// the non-primary shard.
vector<BSONObj> splitPoints;
vector<ShardId> shardIds;
calcInitSplitsAndShards(txn, primaryShardId, initPoints, initShardIds, &splitPoints, &shardIds);
// this is the first chunk; start the versioning from scratch
ChunkVersion version(1, 0, OID::gen());
log() << "going to create " << splitPoints.size() + 1 << " chunk(s) for: " << _ns
<< " using new epoch " << version.epoch();
for (unsigned i = 0; i <= splitPoints.size(); i++) {
BSONObj min = i == 0 ? _keyPattern.getKeyPattern().globalMin() : splitPoints[i - 1];
BSONObj max =
i < splitPoints.size() ? splitPoints[i] : _keyPattern.getKeyPattern().globalMax();
ChunkType chunk;
chunk.setName(Chunk::genID(_ns, min));
chunk.setNS(_ns);
chunk.setMin(min);
chunk.setMax(max);
chunk.setShard(shardIds[i % shardIds.size()]);
chunk.setVersion(version);
Status status = grid.catalogManager(txn)
->insertConfigDocument(txn, ChunkType::ConfigNS, chunk.toBSON());
if (!status.isOK()) {
const string errMsg = str::stream()
<< "Creating first chunks failed: " << status.reason();
error() << errMsg;
return Status(status.code(), errMsg);
}
version.incMinor();
}
_version = ChunkVersion(0, 0, version.epoch());
return Status::OK();
}
