Are multiple files stored in a single block?

Question

When I store many small files into HDFS, will they get stored in a single block?

In my opinion, these small files should get stored into a single block according to

Answer 1

Quoting from Hadoop - The Definitive Guide:

HDFS stores small files inefficiently, since each file is stored in a block, and block metadata is held in memory by the namenode. Thus, a large number of small files can eat up a lot of memory on the namenode. (Note, however, that small files do not take up any more disk space than is required to store the raw contents of the file. For example, a 1 MB file stored with a block size of 128 MB uses 1 MB of disk space, not 128 MB.) Hadoop Archives, or HAR files, are a file archiving facility that packs files into HDFS blocks more efficiently, thereby reducing namenode memory usage while still allowing transparent access to files.

Conclusion: Each file will get stored in a separate block.