1 files changed, 63 insertions, 0 deletions
diff --git a/jstests/sharding/sharding_balance1.js b/jstests/sharding/sharding_balance1.js
new file mode 100644
index 00000000000..e577511e571
--- /dev/null
+++ b/jstests/sharding/sharding_balance1.js
@@ -0,0 +1,63 @@
+(function() {
+
+var s = new ShardingTest({ name: "slow_sharding_balance1",
+                           shards: 2,
+                           mongos: 1,
+                           verbose: 1,
+                           other: { chunkSize: 1, enableBalancer : true } });
+
+s.adminCommand( { enablesharding : "test" } );
+s.ensurePrimaryShard('test', 'shard0001');
+
+s.config.settings.find().forEach( printjson )
+
+db = s.getDB( "test" );
+
+bigString = ""
+while ( bigString.length < 10000 )
+    bigString += "asdasdasdasdadasdasdasdasdasdasdasdasda";
+
+inserted = 0;
+num = 0;
+var bulk = db.foo.initializeUnorderedBulkOp();
+while ( inserted < ( 20 * 1024 * 1024 ) ){
+    bulk.insert({ _id: num++, s: bigString });
+    inserted += bigString.length;
+}
+assert.writeOK(bulk.execute());
+
+s.adminCommand( { shardcollection : "test.foo" , key : { _id : 1 } } );
+assert.lt( 20 , s.config.chunks.count()  , "setup2" );
+
+function diff1(){
+    var x = s.chunkCounts( "foo" );
+    printjson( x )
+    return Math.max( x.shard0000 , x.shard0001 ) - Math.min( x.shard0000 , x.shard0001 );
+}
+
+function sum(){
+    var x = s.chunkCounts( "foo" );
+    return x.shard0000 + x.shard0001;
+}
+
+assert.lt( 20 , diff1() , "big differential here" );
+print( diff1() )
+
+assert.soon( function(){
+    var d = diff1();
+    return d < 5;
+// Make sure there's enough time here, since balancing can sleep for 15s or so between balances.
+} , "balance didn't happen" , 1000 * 60 * 5 , 5000 );
+    
+var chunkCount = sum();
+s.adminCommand( { removeshard: "shard0000" } );
+
+assert.soon( function(){
+    printjson(s.chunkCounts( "foo" ));
+    s.config.shards.find().forEach(function(z){printjson(z);});
+    return chunkCount == s.config.chunks.count({shard: "shard0001"});
+} , "removeshard didn't happen" , 1000 * 60 * 3 , 5000 );
+
+s.stop();
+
+})();