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diff --git a/private_join_and_compute/util/process_record_file_parameters.h b/private_join_and_compute/util/process_record_file_parameters.h
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+/*
+ * Copyright 2019 Google LLC.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef PRIVATE_JOIN_AND_COMPUTE_UTIL_PROCESS_RECORD_FILE_PARAMETERS_H_
+#define PRIVATE_JOIN_AND_COMPUTE_UTIL_PROCESS_RECORD_FILE_PARAMETERS_H_
+
+#include <cstddef>
+#include <cstdint>
+
+namespace private_join_and_compute::util {
+
+// Parameters needed by process_record_file.
+struct ProcessRecordFileParameters {
+  // The number of threads to use to parallelize the encryption operations.
+  uint32_t thread_count = 8;
+
+  // The maximum number of values to read in memory and encrypt at once.
+  // Large data files will be encrypted in chunks to avoid running out of
+  // memory.
+  size_t data_chunk_size = 10'000'000;
+};
+
+}  // namespace private_join_and_compute::util
+
+#endif  // PRIVATE_JOIN_AND_COMPUTE_UTIL_PROCESS_RECORD_FILE_PARAMETERS_H_