Hey Yoonmin,
Unfortunately I agree it's a bit complex, especially because "Block" is
sometimes used where "Replica" might be more accurate. If you find any
ambiguities like this, I think we'd happily take patches with clarifying
comments / javadoc.
The best way to learn is to read the code, but m
When we see the source code of hdfs especially FSNamesystem, there is so
many block related types are used such as Block, LocatedBLocks,
BlocksWithLocations. And this makes me very unclear about the system.
In addition, BlocksMap just maps Block and BlockInfo, but Block becomes
LocatedBlock with D
