Hi,
Yes, its possible to convert a read-only replica server to be supplier (master) server.
The pros are each server is ready to take any updates from client applications, while keeping all other servers updated.
The cons include increased number of replication agreements (queues) to manage. And there may be a possibility of replication conflicts (mainly if the ldap client updates corresponding to same entry are sprayed across multiple write masters).
Most environments use multi master topology as the data consistency take most precedence.
You may use either Web Admin Tool or Command line methods to convert a replica to be a supplier (master).
There is some clues in Knowledge Center related to Web Admin Tool method:
https://www.ibm.com/support/knowledgecenter/SSVJJU_6.4.0/com.ibm.IBMDS.doc_6.4/ds_ag_srv_adm_repl_move_promote_server_wat.html
When using Command line method, you need to create an ldif file with necessary/required topology entries (ibm-replicasubentry/supplier and ibm-replicationagreement/consumer) and use idsldapadd to add the topology.
If you need detailed assistance please open a case with "Directory Server" support team.
------------------------------
Ramamohan Reddy
------------------------------
Original Message:
Sent: Thu April 23, 2020 03:55 PM
From: Girija Ghadai
Subject: How to make multiple master ISDS from replica ISDS servers.
Hi All,
Hope you all are healthy.
Here is my question, If we have 3-3 ISDS servers in 2 regions and from all those 6 servers only one master ISDS server rest 5 are replica.
As only 1 master in 1 region is not make high availability.
Aim is to make multiple master in both the region and make higher availability.
I think this possible. But don't know th pros and cons.
Request you please suggest on this. If any documents or anything.
Thank you!
------------------------------
Girija Shankar Ghadai
------------------------------