We have a single Zimbra server we'd like to set up as a cold backup. By doing that, I'd like to try rsyncing redo logs to another server, and doing an occasional replay of them on the "cold" server. But right now, our redo logs are pretty large by they rotate, about 1.1G, and about every 7 days. Is there a way to either force the size to be smaller when they rotate and/or force their rotation at a particular time?