useful test

jstests/sharding/migrateMemory.js

@@ -0,0 +1,54 @@
+
+s = new ShardingTest( "migrateMemory" , 2 , 1 , 1 , { chunksize : 1 });
+
+s.config.settings.update( { _id: "balancer" }, { $set : { stopped: true } } , true );
+
+s.adminCommand( { enablesharding : "test" } );
+s.adminCommand( { shardcollection : "test.foo" , key : { _id : 1 } } );
+
+db = s.getDB( "test" ) 
+t = db.foo
+
+str = ""
+while ( str.length < 10000 ){
+    str += "asdasdsdasdasdasdas";
+}
+
+data = 0;
+num = 0;
+while ( data < ( 1024 * 1024 * 10 ) ){
+    t.insert( { _id : num++ , s : str } )
+    data += str.length
+}
+
+db.getLastError()
+
+stats = s.chunkCounts( "foo" )
+from = ""
+to = ""
+for ( x in stats ){
+    if ( stats[x] == 0 )
+        to = x
+    else
+        from = x
+}
+
+s.config.chunks.find().sort( { min : 1 } ).forEach( printjsononeline )
+
+print( "from: " + from + " to: " + to )
+printjson( stats )
+
+ss = []
+
+for ( var f = 0; f<num; f += ( 2 * num / t.stats().nchunks ) ){
+    ss.push( s.getServer( "test" ).getDB( "admin" ).serverStatus() )
+    print( f )
+    s.adminCommand( { movechunk : "test.foo" , find : { _id : f } , to : to } )
+}
+
+for ( i=0; i<ss.length; i++ )
+    printjson( ss[i].mem );
+
+
+s.stop()
+