[mashup-dev] Mashup Server Deployment Architecture

[James Clark]

One point to think about is how to make it possible to deploy a new
version of a service, in such a way that the switchover from the old to
the new version of the service can be done atomically, even when there
are multiple files related to the service.  It would also be nice to be
able to rollback to an old version if a new version fails.

The normal way to do this on Linux at least would be to have one service
per directory, use a name for the directory that includes a version, and
then have the unversioned name of the service be a symlink pointing to
the appropriate versioned directory.  You can then change between
versions just by switching the symlink to point from one directory to
another, which can be done atomically.

James