Description:

The Extended root file server consists of a file server called xrootd
and a cluster management server called cmsd.

The xrootd server was developed for the root analysis framework to
serve root files. However, the server is agnostic to filetypes and
provides POSIX-like access to any type of file.

The cmsd server is the next generation version of the olbd server,
originally developed to cluster and load balance Objectivity/DB AMS
database servers. It provides enhanced capability along with lower
latency and increased throughput.

The old and now deprecated olbd server is still provided by the
package, but it will be removed in a future release. If you are still
using it consider scheduling a migration to the new cmsd server
instead.