Sun Directory Server 5.2 6-Way MMR – part 7 – Initialize replication agreements
To be usable in an MMR, all the suffixes on each instance that are part of the MMR (or replication in general) need to be initialized from the ultimate master (where the data was initially loaded). As some of the instances are not directly replicated from this instance (as there are a maximum of 3 MMR agreements from this instance); but instances which do replicate to them can initialize that data.
In order to successfully initialize all the replica’s in a short amount of time, the first master ( where all the initial data was loaded ), first replicates to a counterpart; then they both replicate to another instance that had not been replicated before. With alot of data, this can take hours to perform.
One methodology I’ve used is:
- ds0 initializes all suffixes on ds3
- ds0 initializes all suffixes on ds1 & ds3 initializes all suffixes on ds4
- ds0 initializes all suffixes on ds5 & ds3 initializes all suffixes on ds2
Do so in this manner will allow you to initialize all the instance suffices in a relatively short amount of time.
After initializing a suffix, before it can accept updates, it needs to have its database back-end enabled, which I’ll write about at a different time.
I’ve created a short example of how to initialize a replica.
