Function ScanTabletMeta

src/admincli.cc:1105–1150

get tablet key range

// get tablet key range
int ScanTabletMeta(const std::string& table_name, const std::string& prefix_path,
                   std::map<std::string, std::pair<std::string, std::string>>* map_scan,
                   std::vector<std::string>* fail_tablet, uint64_t* tablet_num) {
  std::vector<std::string> tablets;
  char table_path[512] = {0};

  snprintf(table_path, sizeof(table_path), "%s/%s", prefix_path.c_str(), table_name.c_str());
  int ret = DfsListDir(table_path, &tablets);
  if (0 != ret) {
    LOG(INFO) << "get table path fail:" << table_path;
    return ret;
  }
  *tablet_num = GetTabletNumFromName(tablets[tablets.size() - 1]);
  LOG(INFO) << "table:" << table_name << "tablet count" << tablets.size()
            << "largest tablet_num:" << *tablet_num;

  std::string startkey_scan;
  std::string endkey_scan;
  std::pair<std::string, std::string> keyrange_scan;

  for (size_t i = 0; i < tablets.size(); i++) {
    ret = GetTabletKeyRange(prefix_path, table_name, tablets[i], startkey_scan, endkey_scan);
    if (0 != ret) {
      LOG(INFO) << "fail table:" << table_name << "tablet:" << tablets[i];
      fail_tablet->push_back(tablets[i]);
      continue;
    }
    // add to tablet scan map
    keyrange_scan = make_pair(endkey_scan, table_name + "/" + tablets[i]);

    auto it = map_scan->find(startkey_scan);
    if (it == map_scan->end()) {
      map_scan->insert(make_pair(startkey_scan, keyrange_scan));
    } else {
      // the same startkey, save the tablet num bigger one
      LOG(INFO) << "start key overlap : 1." << tablets[i] << "2." << it->second.second;
      if (keyrange_scan.second > it->second.second) {
        map_scan->erase(it->first);
        map_scan->insert(make_pair(startkey_scan, keyrange_scan));
      }
    }
  }

  LOG(INFO) << "table:" << table_name << "abnormal count" << fail_tablet->size();
  return 0;
}

// get tablet key range
int ScanAndDiff(const std::string& table_name, const std::string& prefix_path) {