Method DumpMetaCache

be/src/runtime/io/data-cache.cc:1152–1167

}

Status DataCache::Partition::DumpMetaCache(DumpData& dump_data) {
  lock_.DCheckLocked();
  DCHECK(dump_data.cache_files_data.size() == dump_data.file_indexs.size());

  // Walk through the meta cache, taking all keys and entries and dumping them one by one.
  vector<Cache::UniqueHandle> handles = meta_cache_->Dump();
  for (const auto& handle : handles) {
    CacheEntry entry(meta_cache_->Value(handle));
    auto index_iter = dump_data.file_indexs.find(entry.file());
    // If the entry's cache file is not in the list, we do not need to dump it.
    if (index_iter == dump_data.file_indexs.end()) continue;
    dump_data.meta_cache_data.emplace_back(meta_cache_->Key(handle).ToString(),
        index_iter->second, entry.offset(), entry.len(), entry.checksum());
  }
  return Status::OK();
}

Status DataCache::Partition::LoadMetaCache(const DumpData& dump_data) {
  lock_.DCheckLocked();