I have copied this text from ESS1000 pdf in ESS 102 chapter MapR DB.
Although HBase has many advantages over traditional relational databases, there are
some disadvantages as well.
For example, HBase does an operation called compaction, which re-writes multiple
flies into fewer larger files. This operation uses a lot of disk I/O, can slow reads and
writes, and makes recovery from a disaster unreliable.
If you notice the text I have highlighted in red, is it flies or files?