Ndnfs » History » Revision 3
Revision 2 (Wentao Shang, 11/19/2015 02:53 PM) → Revision 3/4 (Wentao Shang, 11/19/2015 03:11 PM)
NDNFS: an NDN-friendly file system
=====
NDNFS Metadata format
-----
NDNFS uses metadata to facilitate the discovery of directory contents, file versions and segments.
The format of metadata is specified using "Google Protobuf":https://github.com/google/protobuf/.
Currently two types of metadata are defined: directory metadata and file metadata.
Directory metadata
-----
The directory metadata helps the client navigate through the NDNFS hierarchy.
The metadata packet contains a list of metadata entries.
Each entry specifies the path of the entry and its entry type (file, directory, symlink, etc.).
message DirInfo
{
required string path = 1;
required int32 type = 2;
}
message DirInfoArray
{
repeated DirInfo di = 1;
}
File metadata
-----
The file metadata contains at least three attributes: size, total number of segments and current version number.
More attributes can be added in the future.
message FileInfo
{
required int32 size = 1;
required int32 totalseg = 2;
required int32 version = 3;
}
NDNFS Metadata Protocol
-----
TBD.