本文整理了Java中org.apache.hadoop.io.IOUtils.fsync()方法的一些代码示例，展示了IOUtils.fsync()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。IOUtils.fsync()方法的具体详情如下：
包路径：org.apache.hadoop.io.IOUtils
类名称：IOUtils
方法名：fsync

IOUtils.fsync介绍

[英]Ensure that any writes to the given file is written to the storage device that contains it. This method opens channel on given File and closes it once the sync is done.
Borrowed from Uwe Schindler in LUCENE-5588
[中]确保对给定文件的任何写入都会写入包含该文件的存储设备。此方法在给定文件上打开通道，并在同步完成后将其关闭。
借用LUCENE-5588中的Uwe Schindler

代码示例

代码示例来源：origin: org.apache.hadoop/hadoop-common

/**
 * Ensure that any writes to the given file is written to the storage device
 * that contains it. This method opens channel on given File and closes it
 * once the sync is done.<br>
 * Borrowed from Uwe Schindler in LUCENE-5588
 * @param fileToSync the file to fsync
 */
public static void fsync(File fileToSync) throws IOException {
 if (!fileToSync.exists()) {
  throw new FileNotFoundException(
    "File/Directory " + fileToSync.getAbsolutePath() + " does not exist");
 }
 boolean isDir = fileToSync.isDirectory();
 // HDFS-13586, FileChannel.open fails with AccessDeniedException
 // for any directory, ignore.
 if (isDir && Shell.WINDOWS) {
  return;
 }
 // If the file is a directory we have to open read-only, for regular files
 // we must open r/w for the fsync to have an effect. See
 // http://blog.httrack.com/blog/2013/11/15/
 // everything-you-always-wanted-to-know-about-fsync/
 try(FileChannel channel = FileChannel.open(fileToSync.toPath(),
   isDir ? StandardOpenOption.READ : StandardOpenOption.WRITE)){
  fsync(channel, isDir);
 }
}

代码示例来源：origin: org.apache.hadoop/hadoop-hdfs

/**
 * Sync the given {@link FileOutputStream}.
 *
 * @param  volume target volume. null if unavailable.
 * @throws IOException
 */
public void sync(
  @Nullable FsVolumeSpi volume, FileOutputStream fos) throws IOException {
 final long begin = profilingEventHook.beforeFileIo(volume, SYNC, 0);
 try {
  faultInjectorEventHook.beforeFileIo(volume, SYNC, 0);
  IOUtils.fsync(fos.getChannel(), false);
  profilingEventHook.afterFileIo(volume, SYNC, begin, 0);
 } catch (Exception e) {
  onFailure(volume, begin);
  throw e;
 }
}

代码示例来源：origin: org.apache.hadoop/hadoop-hdfs

/**
 * Sync the given directory changes to durable device.
 * @throws IOException
 */
public void dirSync(@Nullable FsVolumeSpi volume, File dir)
  throws IOException {
 final long begin = profilingEventHook.beforeFileIo(volume, SYNC, 0);
 try {
  faultInjectorEventHook.beforeFileIo(volume, SYNC, 0);
  IOUtils.fsync(dir);
  profilingEventHook.afterFileIo(volume, SYNC, begin, 0);
 } catch (Exception e) {
  onFailure(volume, begin);
  throw e;
 }
}

代码示例来源：origin: io.prestosql.hadoop/hadoop-apache

private void fsyncDirectory(File... dirs)
  throws IOException {
 for (File dir : dirs) {
  try {
   IOUtils.fsync(dir);
  } catch (IOException e) {
   throw new IOException("Failed to sync " + dir, e);
  }
 }
}

代码示例来源：origin: ch.cern.hadoop/hadoop-hdfs

private void fsyncDirectory(File... dirs)
  throws IOException {
 for (File dir : dirs) {
  try {
   IOUtils.fsync(dir);
  } catch (IOException e) {
   throw new IOException("Failed to sync " + dir, e);
  }
 }
}

代码示例来源：origin: ch.cern.hadoop/hadoop-common

/**
 * Ensure that any writes to the given file is written to the storage device
 * that contains it. This method opens channel on given File and closes it
 * once the sync is done.<br>
 * Borrowed from Uwe Schindler in LUCENE-5588
 * @param fileToSync the file to fsync
 */
public static void fsync(File fileToSync) throws IOException {
 if (!fileToSync.exists()) {
  throw new FileNotFoundException(
    "File/Directory " + fileToSync.getAbsolutePath() + " does not exist");
 }
 boolean isDir = fileToSync.isDirectory();
 // If the file is a directory we have to open read-only, for regular files
 // we must open r/w for the fsync to have an effect. See
 // http://blog.httrack.com/blog/2013/11/15/
 // everything-you-always-wanted-to-know-about-fsync/
 try(FileChannel channel = FileChannel.open(fileToSync.toPath(),
   isDir ? StandardOpenOption.READ : StandardOpenOption.WRITE)){
  fsync(channel, isDir);
 }
}

代码示例来源：origin: io.prestosql.hadoop/hadoop-apache

/**
 * Ensure that any writes to the given file is written to the storage device
 * that contains it. This method opens channel on given File and closes it
 * once the sync is done.<br>
 * Borrowed from Uwe Schindler in LUCENE-5588
 * @param fileToSync the file to fsync
 */
public static void fsync(File fileToSync) throws IOException {
 if (!fileToSync.exists()) {
  throw new FileNotFoundException(
    "File/Directory " + fileToSync.getAbsolutePath() + " does not exist");
 }
 boolean isDir = fileToSync.isDirectory();
 // If the file is a directory we have to open read-only, for regular files
 // we must open r/w for the fsync to have an effect. See
 // http://blog.httrack.com/blog/2013/11/15/
 // everything-you-always-wanted-to-know-about-fsync/
 try(FileChannel channel = FileChannel.open(fileToSync.toPath(),
   isDir ? StandardOpenOption.READ : StandardOpenOption.WRITE)){
  fsync(channel, isDir);
 }
}