Well, the bad news is that I did not get any positive responses (that I
can recall) from the list. But I did a little digging. suppossedly in
the latest release you can do A-B-C-D-A. Something to do with the
server name encoded in the blog. I'm not much of a dba but in todays ID
sweatshops they are trying to squeeze me for all I got. My official
answer to the higher ups was I know this can be done in Oracle but at
thier licensing costs there's no way. If I get anything concrete going
I'll drop a note to the list.
/Joe
Gaspar Bakos wrote:
Hi, Joe,
I have exactly the same scenario. Did you get any valuable response you
could share with me? I haven't seen any on the list.
In fact, my case is slightly more complicated; I have N computers, all
having their local databases, and have an additional computer, which I
call the central one, having a central copy of the database. I'd like
to sync all the N+1 databases continuously, so they are identical.
A---C---B
|
D
That is, if I change anything on any PC's DB (e.g. A), it replicates
itself to the central DB (C), and then migrates to B and D. This
means that the A-C connection is such that A is a master and C is
a slave, and the C-B is such that C is a master and B is a slave. On
the other hand, if I change something on another local DB than A,
e.g. B or C itself, I'd like this to migrate to A, i.e. this case
the A-C connection is such that A is the slave.
Altogether, I'd need a continuous master-master replication between all
DBs and C. Similar to a RAID-1 array, just in the world of databases,
and over TCP. Maybe there is a problem with my concept, and this solution
of pushing for reliability will eventually cause chaos.
The Mysql manual does not mention master-master replication:
Starting in Version 3.23.15, MySQL supports one-way replication
internally. One server acts as the master, while the other acts as the
slave.
Cheers,
Gaspar
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