| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * http://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. |
| */ |
| |
| package org.apache.hadoop.fs.slive; |
| |
| import java.io.DataInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Random; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.slive.DataVerifier.VerifyOutput; |
| import org.apache.hadoop.fs.slive.OperationOutput.OutputType; |
| |
| /** |
| * Operation which selects a random file and selects a random read size (from |
| * the read size option) and reads from the start of that file to the read size |
| * (or the full file) and verifies the bytes that were written there. |
| * |
| * This operation will capture statistics on success the time taken to read that |
| * file and the number of successful readings that occurred as well as the |
| * number of bytes read and the number of chunks verified and the number of |
| * chunks which failed verification and on failure or error it will capture the |
| * number of failures and the amount of time taken to fail |
| */ |
| class ReadOp extends Operation { |
| private static final Log LOG = LogFactory.getLog(ReadOp.class); |
| |
| ReadOp(ConfigExtractor cfg, Random rnd) { |
| super(ReadOp.class.getSimpleName(), cfg, rnd); |
| } |
| |
| /** |
| * Gets the file name to read |
| * |
| * @return Path |
| */ |
| protected Path getReadFile() { |
| Path fn = getFinder().getFile(); |
| return fn; |
| } |
| |
| @Override // Operation |
| List<OperationOutput> run(FileSystem fs) { |
| List<OperationOutput> out = super.run(fs); |
| DataInputStream is = null; |
| try { |
| Path fn = getReadFile(); |
| Range<Long> readSizeRange = getConfig().getReadSize(); |
| long readSize = 0; |
| String readStrAm = ""; |
| if (getConfig().shouldReadFullFile()) { |
| readSize = Long.MAX_VALUE; |
| readStrAm = "full file"; |
| } else { |
| readSize = Range.betweenPositive(getRandom(), readSizeRange); |
| readStrAm = Helper.toByteInfo(readSize); |
| } |
| long timeTaken = 0; |
| long chunkSame = 0; |
| long chunkDiff = 0; |
| long bytesRead = 0; |
| long startTime = 0; |
| DataVerifier vf = new DataVerifier(); |
| LOG.info("Attempting to read file at " + fn + " of size (" + readStrAm |
| + ")"); |
| { |
| // open |
| startTime = Timer.now(); |
| is = fs.open(fn); |
| timeTaken += Timer.elapsed(startTime); |
| // read & verify |
| VerifyOutput vo = vf.verifyFile(readSize, is); |
| timeTaken += vo.getReadTime(); |
| chunkSame += vo.getChunksSame(); |
| chunkDiff += vo.getChunksDifferent(); |
| bytesRead += vo.getBytesRead(); |
| // capture close time |
| startTime = Timer.now(); |
| is.close(); |
| is = null; |
| timeTaken += Timer.elapsed(startTime); |
| } |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.OK_TIME_TAKEN, timeTaken)); |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.BYTES_READ, bytesRead)); |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.SUCCESSES, 1L)); |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.CHUNKS_VERIFIED, chunkSame)); |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.CHUNKS_UNVERIFIED, chunkDiff)); |
| LOG.info("Read " + Helper.toByteInfo(bytesRead) + " of " + fn + " with " |
| + chunkSame + " chunks being same as expected and " + chunkDiff |
| + " chunks being different than expected in " + timeTaken |
| + " milliseconds"); |
| |
| } catch (FileNotFoundException e) { |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.NOT_FOUND, 1L)); |
| LOG.warn("Error with reading", e); |
| } catch (BadFileException e) { |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.BAD_FILES, 1L)); |
| LOG.warn("Error reading bad file", e); |
| } catch (IOException e) { |
| out.add(new OperationOutput(OutputType.LONG, getType(), |
| ReportWriter.FAILURES, 1L)); |
| LOG.warn("Error reading", e); |
| } finally { |
| if (is != null) { |
| try { |
| is.close(); |
| } catch (IOException e) { |
| LOG.warn("Error closing read stream", e); |
| } |
| } |
| } |
| return out; |
| } |
| } |