The main problem of the initial MultiSite setup is one of combinatorial explosion. The simplest is to describe it with an example scenario.
Let's take a vob:
/vob/a, with replicas
s2 (we'll designate the replicas and the sites with the same names).
Suppose we create from site
s1 a new replica
s3, to be shipped and imported to site
s2 will start creating and shipping to their destinations, sync packets for both
Suppose now we create from site
s3 a replica
s4. On the same schedule as previously,
s2 will now create and ship packets for
s1, s3, and
s4. And so forth. And every replica will receive packets from every other. All the three phases: export, shipping, import are thus impacted, and for all the existing ...