Upgrading Front-end and Master machines.
Michael D. Sofka
sofkam at rpi.edu
Mon Nov 15 16:39:26 EST 2010
My back-end server is now a new cyrus 2.3.16 machine. I also have a
temporary replication server (more on that later). It is now time to
upgrade the front-end servers and the db master. Is there a preferred
upgrade order? Can two different versions of the front-end co-exist?
I would like to upgrade one of the front-end servers, and if after a day
or two there are no issues, update the other. I don't really care when
the db master is upgraded, but I would like to do it in the correct
order (before or after all the front-end servers are upgraded).
I am concerned about the "user_deny.db" and Thunderbird 3 problem. For
now, people are connecting to 2.2.12 front-end machines. If I upgrade
them, will there be a problem? Will a 2.3.17 patch fixing this come out?
I mention that the replication server is temporary. I'm using
``borrowed'' SAN disks. One of the old back-end servers is being
rebuilt with new OS, Cyrus, iSCSI disks, etc. When the time comes, how
do I go about replacing the replication server? Rsync the data, switch
in the new server, and run sync_client -u? Or, is there a better way?
Michael D. Sofka sofkam at rpi.edu
C&MT Sr. Systems Programmer, Email, HPC, TeX, Epistemology
Rensselaer Polytechnic Institute, Troy, NY. http://www.rpi.edu/~sofkam/
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