46 lines
1.8 KiB
JavaScript
46 lines
1.8 KiB
JavaScript
// cursor1.js
|
|
// checks that cursors survive a chunk's move
|
|
|
|
s = new ShardingTest( "sharding_cursor1" , 2 , 2 )
|
|
|
|
// take the balancer out of the equation
|
|
s.config.settings.update( { _id: "balancer" }, { $set : { stopped: true } } , true );
|
|
s.config.settings.find().forEach( printjson )
|
|
|
|
// create a sharded 'test.foo', for the moment with just one chunk
|
|
s.adminCommand( { enablesharding: "test" } );
|
|
s.adminCommand( { shardcollection: "test.foo", key: { _id: 1 } } )
|
|
|
|
db = s.getDB( "test" );
|
|
primary = s.getServer( "test" ).getDB( "test" );
|
|
secondary = s.getOther( primary ).getDB( "test" );
|
|
|
|
numObjs = 10;
|
|
for (i=0; i < numObjs; i++){
|
|
db.foo.insert({_id: i});
|
|
}
|
|
db.getLastError();
|
|
assert.eq( 1, s.config.chunks.count() , "test requires collection to have one chunk initially" );
|
|
|
|
// we'll split the collection in two and move the second chunk while three cursors are open
|
|
// cursor1 still has more data in the first chunk, the one that didn't move
|
|
// cursor2 buffered the last obj of the first chunk
|
|
// cursor3 buffered data that was moved on the second chunk
|
|
var cursor1 = db.foo.find().batchSize( 3 );
|
|
assert.eq( 3 , cursor1.objsLeftInBatch() );
|
|
var cursor2 = db.foo.find().batchSize( 5 );
|
|
assert.eq( 5 , cursor2.objsLeftInBatch() );
|
|
var cursor3 = db.foo.find().batchSize( 7 );
|
|
assert.eq( 7 , cursor3.objsLeftInBatch() );
|
|
|
|
s.adminCommand( { split: "test.foo" , middle : { _id : 5 } } );
|
|
s.adminCommand( { movechunk : "test.foo" , find : { _id : 5 } , to : secondary.getMongo().name } );
|
|
assert.eq( 2, s.config.chunks.count() );
|
|
|
|
// the cursors should not have been affected
|
|
assert.eq( numObjs , cursor1.itcount() , "c1" );
|
|
assert.eq( numObjs , cursor2.itcount() , "c2" );
|
|
assert.eq( numObjs , cursor3.itcount() , "c3" );
|
|
|
|
s.stop()
|