> We have a number of clients where we are upgrading their server from
> 2.0 to 2.1.
>
> Is it OK to leave the client workstations (minimal Firebird install)

on

> version 2.0 when changing the server to 2.1?

I would suggest that you update all of the clients to v2.1, to allow the
clients to take advantage of the protocol performance improvements made
in v2.1.

The v2.1 client is backward compatible with all previous/older servers.


Sean