chore(): Added benchmark tests for parquet and hdf5

src/main/java/org/apache/sysds/runtime/io/FrameReaderParquetParallel.java

@@ -16,23 +16,28 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+
 package org.apache.sysds.runtime.io;
 
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Comparator;
 import java.util.List;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Future;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
-import org.apache.parquet.hadoop.ParquetFileReader;
+import org.apache.parquet.example.data.Group;
 import org.apache.parquet.hadoop.metadata.BlockMetaData;
+import org.apache.parquet.hadoop.ParquetFileReader;
+import org.apache.parquet.hadoop.ParquetReader;
+import org.apache.parquet.hadoop.example.GroupReadSupport;
 import org.apache.parquet.hadoop.util.HadoopInputFile;
-import org.apache.sysds.common.Types.ValueType;
+import org.apache.parquet.schema.MessageType;
+import org.apache.parquet.schema.PrimitiveType;
 import org.apache.sysds.hops.OptimizerUtils;
 import org.apache.sysds.runtime.util.CommonThreadPool;
 
@@ -42,31 +47,81 @@
  */
 public class FrameReaderParquetParallel extends FrameReaderParquet {
 
+	private Path[] getParquetDataFilePaths(FileSystem fs, Path path) throws IOException {
+		FileStatus status = fs.getFileStatus(path);
+
+		if(status.isFile())
+			return new Path[] {path};
+
+		List<Path> files = new ArrayList<>();
+		for(FileStatus child : fs.listStatus(path)) {
+			if(child.isFile() && isParquetDataFile(child.getPath()))
+				files.add(child.getPath());
+		}
+
+		return files.toArray(new Path[0]);
+	}
+
+	private boolean isParquetDataFile(Path path) {
+		String name = path.getName();
+
+		return !name.startsWith("_") && !name.startsWith(".") && !name.endsWith(".crc");
+	}
+
+	private long getParquetRowCount(Path path, Configuration conf) throws IOException {
+		long rowCount = 0;
+		try(ParquetFileReader fileReader = ParquetFileReader.open(HadoopInputFile.fromPath(path, conf))) {
+			for(BlockMetaData block : fileReader.getFooter().getBlocks()) {
+				rowCount += block.getRowCount();
+			}
+		}
+		return rowCount;
+	}
+
+	/**
+	 * Reads a Parquet frame in parallel and populates the provided FrameBlock with the data. The method retrieves all
+	 * Parquet data file paths at the given location, it then determines the number of threads to use based on the
+	 * available files and a configured parallelism setting. A thread pool is created to run a reading task for each
+	 * file concurrently.
+	 *
+	 * @param path The HDFS path to the Parquet file or the directory containing part files.
+	 * @param conf The Hadoop configuration.
+	 * @param dest The FrameBlock to be updated with the data read from the files.
+	 * @param rlen The expected number of rows.
+	 * @param clen The expected number of columns.
+	 */
 	@Override
-	protected void readParquetFrameFromHDFS(Path path, Configuration conf, Object[] dest, ValueType[] schema,
-		String[] names, long rlen) throws IOException {
-		FileSystem fs = IOUtilFunctions.getFileSystem(path);
-		Path[] files = IOUtilFunctions.getSequenceFilePaths(fs, path);
-		Arrays.sort(files, Comparator.comparing(Path::getName));
-		int numThreads = Math.min(OptimizerUtils.getParallelBinaryReadParallelism(), files.length);
+	protected void readParquetFrameFromHDFS(Path path, Configuration conf, FrameBlock dest, long rlen, long clen)
+		throws IOException, DMLRuntimeException {
+		FileSystem fs = IOUtilFunctions.getFileSystem(path, conf);
+		Path[] files = getParquetDataFilePaths(fs, path);
+
+		if(files.length == 0)
+			throw new IOException("No Parquet data files found at path: " + path);
+
+		Arrays.sort(files);
+		long[] rowCounts = new long[files.length];
+		long totalRows = 0;
 
-		long[] offsets = new long[files.length];
-		long cumulative = 0;
 		for(int i = 0; i < files.length; i++) {
-			offsets[i] = cumulative;
-			try(ParquetFileReader reader = ParquetFileReader.open(HadoopInputFile.fromPath(files[i], conf))) {
-				for(BlockMetaData block : reader.getFooter().getBlocks())
-					cumulative += block.getRowCount();
-			}
+			rowCounts[i] = getParquetRowCount(files[i], conf);
+			totalRows += rowCounts[i];
 		}
-		if(cumulative != rlen)
-			throw new IOException("Mismatch in row count: expected " + rlen + ", but got " + cumulative);
 
+		if(rlen >= 0 && totalRows != rlen)
+			throw new IOException("Mismatch in row count: expected " + rlen + ", but got " + totalRows);
+
+		int numThreads = Math.min(OptimizerUtils.getParallelBinaryReadParallelism(), files.length);
+		// Create and execute read tasks
 		ExecutorService pool = CommonThreadPool.get(numThreads);
 		try {
 			List<ReadFileTask> tasks = new ArrayList<>();
-			for(int i = 0; i < files.length; i++)
-				tasks.add(new ReadFileTask(files[i], conf, dest, schema, names, rlen, (int) offsets[i]));
+			long rowOffset = 0;
+
+			for(int i = 0; i < files.length; i++) {
+				tasks.add(new ReadFileTask(files[i], conf, dest, clen, rowOffset, rowCounts[i]));
+				rowOffset += rowCounts[i];
+			}
 
 			for(Future<Object> task : pool.invokeAll(tasks))
 				task.get();
@@ -80,28 +135,53 @@
 	}
 
 	private class ReadFileTask implements Callable<Object> {
-		private final Path path;
-		private final Configuration conf;
-		private final Object[] dest;
-		private final ValueType[] schema;
-		private final String[] names;
-		private final long rlen;
-		private final int rowOffset;
-
-		public ReadFileTask(Path path, Configuration conf, Object[] dest, ValueType[] schema, String[] names, long rlen,
-			int rowOffset) {
+		private Path path;
+		private Configuration conf;
+		private FrameBlock dest;
+		private long clen;
+		private long rowOffset;
+		private long expectedRows;
+
+		public ReadFileTask(Path path, Configuration conf, FrameBlock dest, long clen, long rowOffset,
+			long expectedRows) {
 			this.path = path;
 			this.conf = conf;
 			this.dest = dest;
-			this.schema = schema;
-			this.names = names;
-			this.rlen = rlen;
+			this.clen = clen;
 			this.rowOffset = rowOffset;
+			this.expectedRows = expectedRows;
 		}
 
 		@Override
 		public Object call() throws Exception {
-			readSingleParquetFile(path, conf, dest, schema, names, rlen, rowOffset);
+			MessageType parquetSchema;
+			try(ParquetFileReader fileReader = ParquetFileReader.open(HadoopInputFile.fromPath(path, conf))) {
+				parquetSchema = fileReader.getFooter().getFileMetaData().getSchema();
+			}
+			String[] columnNames = dest.getColumnNames();
+			int[] columnIndices = getParquetColumnIndices(parquetSchema, columnNames);
+			PrimitiveType.PrimitiveTypeName[] columnTypes = getParquetColumnTypes(parquetSchema, columnIndices);
+			try(ParquetReader<Group> reader = ParquetReader.builder(new GroupReadSupport(), path).withConf(conf)
+				.build()) {
+				Group group;
+				long localRow = 0;
+
+				while((group = reader.read()) != null) {
+					if(localRow >= expectedRows)
+						throw new IOException("Mismatch in row count for file " + path + ": expected " + expectedRows
+							+ ", but got more rows.");
+					int outRow = Math.toIntExact(rowOffset + localRow);
+					for(int col = 0; col < clen; col++) {
+						int colIndex = columnIndices[col];
+						dest.set(outRow, col, readTypedParquetValue(group, columnTypes[col], colIndex));
+					}
+					localRow++;
+				}
+
+				if(localRow != expectedRows)
+					throw new IOException("Mismatch in row count for file " + path + ": expected " + expectedRows
+						+ ", but got " + localRow);
+			}
 			return null;
 		}
 	}