This repository includes codes of a distributed file system named DDDFS.

Author: Miki Horiuchi <mikity@logos.ic.i.u-tokyo.ac.jp>

Created Date: 3/13/2012

Last Update: 5/25/2012

• FUSE
• python-fuse

They might be install using packaging systems of your distributions. The example with Debian are as follows:

# apt-get install fuse
# apt-get install python-fuse

FUSE

http://fuse.sourceforge.net/

python-fuse

http://pypi.python.org/pypi/fuse-python

Add bin/ of this repository to PATH environmental variable.

DDDFS works with three components:

• Metadata server
• Data servers
• Clients

Data servers and clients must be run after a metadata server has been activated.

$ dddfs --meta /path/to/metadata/dir

This starts the metadata server daemon.

$ dddfs --server --meta_addr METADATA_SERVER_HOSTNAME /path/to/data/dir

This starts a data server daemon.

$ dddfs --client --meta_addr METADATA_SERVER_HOSTNAME /path/to/mount/dir [fuse options]

This starts a DDDFS client daemon and mounts /path/to/mount/dir.

To unmount /path/to/mount/dir:

$ fusermount -u /path/to/mount/dir

Umount can be failed with “device is busy” kinds of errors if any other process accesses /path/to/mount/dir. Kill the metadata server daemon and data server daemons by sending SIGINT.