jb-test-assigment
This repository contains a multifs VFS implementation that keeps all information about files
and their contents in a single file on local filesystem. To achieve thread-safety it uses
handmade Read-Write mutex based on this
discussion. Implementation supposes that no hardware errors can happen (and no one can unplug the
computer while the storage file is changing). If one is interested in implementing quite durable
storage, please check out my repository of
the Storage Systems coursework.
To maintain the structure of the filesystem, SingleFileFS uses two entities: node metadata records
and references to these nodes. Because metadata and its size change during write operations,
it is important to be able to quickly update it on disk. To achieve this, SingleFileFS
appends new metadata to the end of file and simply updates a fix-sized reference to that metadata
(there is always exactly one reference for each metadata record), and periodically performs
defragmentation.