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// Where we test operations dealing with large chunks
(function() {
// Starts a new sharding environment limiting the chunksize to 1GB (highest value allowed).
// Note that early splitting will start with a 1/4 of max size currently.
var s = new ShardingTest({ name: 'large_chunk',
shards: 2,
other: { chunkSize: 1024 } });
// take the balancer out of the equation
s.config.settings.update( { _id: "balancer" }, { $set : { stopped: true } } , true );
s.config.settings.find().forEach(printjson);
db = s.getDB( "test" );
//
// Step 1 - Test moving a large chunk
//
// Turn on sharding on the 'test.foo' collection and generate a large chunk
s.adminCommand( { enablesharding : "test" } );
s.ensurePrimaryShard('test', 'shard0001');
bigString = "";
while ( bigString.length < 10000 )
bigString += "asdasdasdasdadasdasdasdasdasdasdasdasda";
inserted = 0;
num = 0;
var bulk = db.foo.initializeUnorderedBulkOp();
while ( inserted < ( 400 * 1024 * 1024 ) ){
bulk.insert({ _id: num++, s: bigString });
inserted += bigString.length;
}
assert.writeOK(bulk.execute());
s.adminCommand( { shardcollection : "test.foo" , key : { _id : 1 } } );
assert.eq( 1 , s.config.chunks.count() , "step 1 - need one large chunk" );
primary = s.getServer( "test" ).getDB( "test" );
secondary = s.getOther( primary ).getDB( "test" );
// Make sure that we don't move that chunk if it goes past what we consider the maximum chunk size
print("Checkpoint 1a");
max = 200 * 1024 * 1024;
assert.throws(function() {
s.adminCommand({ movechunk: "test.foo",
find: { _id: 1 },
to: secondary.getMongo().name,
maxChunkSizeBytes: max });
});
// Move the chunk
print("checkpoint 1b");
before = s.config.chunks.find().toArray();
s.adminCommand( { movechunk : "test.foo" , find : { _id : 1 } , to : secondary.getMongo().name } );
after = s.config.chunks.find().toArray();
assert.neq( before[0].shard , after[0].shard , "move chunk did not work" );
s.config.changelog.find().forEach( printjson );
s.stop();
})();
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