/** Use the command chmod to set permission. */
@Override
public void setPermission(Path p, FsPermission permission) throws IOException {
if (NativeIO.isAvailable()) {
NativeIO.POSIX.chmod(pathToFile(p).getCanonicalPath(), permission.toShort());
} else {
String perm = String.format("%04o", permission.toShort());
Shell.execCommand(
Shell.getSetPermissionCommand(perm, false, FileUtil.makeShellPath(pathToFile(p), true)));
}
}
public static class PageRounder {
private final long osPageSize =
NativeIO.POSIX.getCacheManipulator().getOperatingSystemPageSize();
/** Round up a number to the operating system page size. */
public long round(long count) {
long newCount = (count + (osPageSize - 1)) / osPageSize;
return newCount * osPageSize;
}
}
@BeforeClass
public static void setupTest() {
EditLogFileOutputStream.setShouldSkipFsyncForTesting(true);
// Track calls to posix_fadvise.
NativeIO.POSIX.setCacheManipulator(tracker);
// Normally, we wait for a few megabytes of data to be read or written
// before dropping the cache. This is to avoid an excessive number of
// JNI calls to the posix_fadvise function. However, for the purpose
// of this test, we want to use small files and see all fadvise calls
// happen.
BlockSender.CACHE_DROP_INTERVAL_BYTES = 4096;
BlockReceiver.CACHE_DROP_LAG_BYTES = 4096;
}