Is it possible to split one DMA from a big cluster to have its own cluster with the elements residing on it?
Or, everything has to be deleted and recreated again after the split configuration taking place?
Hi Kawssar
First of all, I have to say that this goes slightly against our idea of 'one single pane of glass'. We strive towards building one single DataMiner system from which your entire ecosystem can be managed.
However if for any reason it would be necessary to split a DMS, I'm afraid there's not 1 single straight answer to your question. This is certainly not common and all depends on what system architecture you're dealing with.
If you have a DMS where each DMA only has his own local (Cassandra) database, then the split should be indeed quite straight forward. Each DMA has his own data about alarms, elements, ... By removing the DMAs from the cluster and joining those up again afterwards this should be possible. Most likely files that were previously synced inside the big cluster will need to be revisisted after the merge (I'm e.g. thinking about the views).
On the other hand, if you have a DMS with a centralized cassandra cluster/elastic cluster, this split suddenly becomes way harder. Possibly scripting is necessary to migrate the necessary data from database towards a new DB which is quite a complex job.