Method DeleteOldFiles

be/src/runtime/io/data-cache.cc:1035–1043

}

void DataCache::Partition::DeleteOldFiles() {
  std::unique_lock<SpinLock> partition_lock(lock_);
  if (UNLIKELY(files_readonly_)) return;
  DCHECK_GE(oldest_opened_file_, 0);
  int target = cache_files_.size() - FLAGS_data_cache_max_opened_files;
  while (oldest_opened_file_ < target) {
    cache_files_[oldest_opened_file_++]->DeleteFile();
  }
}

void DataCache::Partition::SetCacheFilesReadOnly() {
  std::unique_lock<SpinLock> partition_lock(lock_);