protected boolean isAllSourceFileExist(List<TsFileResource> resources) {
    for (TsFileResource resource : resources) {
      if (resource.getStatus() == TsFileResourceStatus.DELETED) {
        return false;
      }
    }
    return true;
  }
The size of global compaction estimation rough file info cahce.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/selector/estimator/AbstractCompactionEstimator.java