2008/11/10 Vikas Gorur <vikas at zresearch.com>: > 2008/11/9 Wayne A. Green <wgreen at bbtconsulting.com>: > >> We are working on a project that requires replication of video >> archives across a gigE network. The application will provide storage >> for high definition video surveillance in the data center with >> replication of all information to a remote data center. The remote >> data center is accessible via gigE networks. We would like the >> cameras to send images across the gigE networks to replicated >> glusterFS servers. There will be constant writing of >> information. Has this application been explored with GlusterFS? Does >> anyone have any insight? > > The AFR translator in GlusterFS is designed for this very purpose. > When you use it, everything your applications write to files > on the GlusterFS mountpoint will be replicated to a configurable > number of remote servers. Beware that the network bandwidth might get divided between the connections to the servers. 8-) An extreme example: A client machine has one gigE connection to the network and uses client side AFR to replicate the data to 5 servers. The network connection of the client machine has to be shared by the 5 connections - limiting it to a theoretical 200Mbit/s maximum for each connection on write operations. Personally, I would not expect to get more than 15MB/s for big (exceeding client side cache size) write operations on that glusterfs volume because of protocol overhead. Someone who is used to measure 90+MB/s on connections to a single server (using NFS, CIFS or HTTP) might be surprised by that. I admit that this is an extreme example, YMMV. >> Thanks, >> Wayne A. Green > > Vikas Gorur > -- > Engineer - Z Research > http://gluster.com/ Harald St?rzebecher
