public void dataCenterId(byte dataCenterId){
  this.dataCenterId=dataCenterId;
  last=new GridCacheVersion(0,0,order.get(),0,dataCenterId);
}

public void dataCenterId ( byte dataCenterId ) { this . dataCenterId = dataCenterId ; last = new GridCacheVersion ( 0 , 0 , order . get ( ) , 0 , dataCenterId ) ; }
sets data center id .
