message: fix cube cache
diff: @@ -277,7 +277,7 @@ class DBReloadableInferEngine : public ReloadableInferEngine {
  LOG(WARNING) << "Loading cube cache[" << next_idx << "] ...";
  std::string model_path = conf.model_dir();
  if (access(model_path.c_str(), F_OK) == 0) {
  - std::string cube_cache_path = model_path + "/" + "cube_cache";
  + std::string cube_cache_path = model_path + "/cube_cache";
  int reload_cache_ret = md->caches[next_idx]->reload_data(cube_cache_path);
  LOG(WARNING) << "Loading cube cache[" << next_idx << "] done.";
  } else {
  @@ -437,7 +437,7 @@ class CloneDBReloadableInferEngine
  // create caches
  std::string model_path = conf.model_dir();
  if (access(model_path.c_str(), F_OK) == 0) {
  - std::string cube_cache_path = model_path + "cube_cache";
  + std::string cube_cache_path = model_path + "/cube_cache";
  int reload_cache_ret =
  md->caches[next_idx]->reload_data(cube_cache_path);
  LOG(WARNING) << "create cube cache[" << next_idx << "] done.";
  