Distributed Replicated Storage Across Four Storage Nodes With GlusterFS On Fedora 12

This tutorial shows how to combine four single storage servers (running Fedora 12) to a distributed replicated storage with GlusterFS. Nodes 1 and 2 (replication1) as well as 3 and 4 (replication2) will mirror each other, and replication1 and replication2 will be combined to one larger storage server (distribution). Basically, this is RAID10 over network.

If you lose one server from replication1 and one from replication2,
the distributed volume continues to work. The client system (Fedora 12
as well) will be able to access the storage as if it was a local
filesystem. GlusterFS is a clustered file-system capable of scaling to
several peta-bytes. It aggregates various storage bricks over
Infiniband RDMA or TCP/IP interconnect into one large parallel network
file system. Storage bricks can be made of any commodity hardware such
as x86_64 servers with SATA-II RAID and Infiniband HBA.

. Read the rest at howtoforge.net.