资 源 简 介
Distributed Network Block Devices
DNBD (Distributed Network Block Device) is a read-only and caching network
block device and supports following main features:
replication of servers for robustness
multicast communication and caching of network traffic for scalability
These characteristics make it suitable especially for use in wireless networks,
e.g. for diskless clients or to share multimedia files in such an environment.
The servers can export a file or block device equipped with a operating system,
movies, music, etc. Several clients can import the block device and access it
like a local hard disk. However, each block transfer over the network can be
cached by all clients: If several users on each client start to watch a movie
within a certain time interval, the movie data has to be transmitted only once
(depending on the cache size). The network is not burdened with unnecessary
traffic.
DNBD can be
