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//
// Tests that merging chunks does not prevent cluster from doing other metadata ops
//
var options = { separateConfig : true, shardOptions : { verbose : 0 } };
var st = new ShardingTest({ shards : 2, mongos : 2, other : options });
st.stopBalancer();
var mongos = st.s0;
var staleMongos = st.s1;
var admin = mongos.getDB( "admin" );
var shards = mongos.getCollection( "config.shards" ).find().toArray();
var coll = mongos.getCollection( "foo.bar" );
assert( admin.runCommand({ enableSharding : coll.getDB() + "" }).ok );
printjson( admin.runCommand({ movePrimary : coll.getDB() + "", to : shards[0]._id }) );
assert( admin.runCommand({ shardCollection : coll + "", key : { _id : 1 } }).ok );
st.printShardingStatus();
// Split and merge the first chunk repeatedly
jsTest.log( "Splitting and merging repeatedly..." );
for ( var i = 0; i < 5; i++ ) {
assert( admin.runCommand({ split : coll + "", middle : { _id : i } }).ok );
assert( admin.runCommand({ mergeChunks : coll + "",
bounds : [{ _id : MinKey }, { _id : MaxKey }] }).ok );
printjson( mongos.getDB("config").chunks.find().toArray() );
}
// Move the first chunk to the other shard
jsTest.log( "Moving to another shard..." );
assert( admin.runCommand({ moveChunk : coll + "", find : { _id : 0 }, to : shards[1]._id }).ok );
// Split and merge the chunk repeatedly
jsTest.log( "Splitting and merging repeatedly (again)..." );
for ( var i = 0; i < 5; i++ ) {
assert( admin.runCommand({ split : coll + "", middle : { _id : i } }).ok );
assert( admin.runCommand({ mergeChunks : coll + "",
bounds : [{ _id : MinKey }, { _id : MaxKey }] }).ok );
printjson( mongos.getDB("config").chunks.find().toArray() );
}
// Move the chunk back to the original shard
jsTest.log( "Moving to original shard..." );
assert( admin.runCommand({ moveChunk : coll + "", find : { _id : 0 }, to : shards[0]._id }).ok );
st.printShardingStatus();
jsTest.log( "DONE!" );
st.stop();
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