// NB: should wait at least 1 second to ensure the timestamp of the master
    // index will change upon the writing, because Linux seems to update the
    // file modification
    // time with 1 second accuracy:
// NB: should wait at least 1 second to ensure the timestamp of the master
    // index will change upon the writing, because Linux seems to update the
    // file modification
    // time with 1 second accuracy: | TestHarFileSystemBasics.java