Method MaybeSaveSnapshot

catboost/cuda/methods/boosting_progress_tracker.cpp:241–260

    }

    void TBoostingProgressTracker::MaybeSaveSnapshot(std::function<void(IOutputStream*)> saver) {
        if (IsTimeToSaveSnapshot()) {
            const auto snapshotBackup = OutputFiles.SnapshotFile + ".bak";
            TProgressHelper(GpuProgressLabel()).Write(snapshotBackup, [&](IOutputStream* out) {
                NJson::TJsonArray processors;
                const auto& devicesProps = NCudaLib::NCudaHelpers::GetDevicesProps();
                for (const auto& props : devicesProps) {
                    processors.AppendValue(props.GetName());
                }
                TrainingCallbacks->OnSaveSnapshot(processors, out);
                ::Save(out, CatBoostOptionsStr);
                ::Save(out, History);
                ::Save(out, ProfileInfo.DumpProfileInfo());
                ::Save(out, LearnAndTestQuantizedFeaturesCheckSum);
                saver(out);
            });
            TFsPath(snapshotBackup).ForceRenameTo(OutputFiles.SnapshotFile);
            LastSnapshotTime = Now();
        }
    }
}