Hi,
Good Evening!!!
Looking for some help to setup forest replica in a best way to setup
Disaster Recovery environment. Two approaches have been tried out. Please
find below the scenarios I have tried and the issues are found against my
expectations.
*Approach #1 - Same Cluster*
Currently, the cluster has 3 hosts in testing environment. The DB is
split into 3 forests as follows.
- DB-F1 (host1)
- DB-F2 (host2)
- DB-F3 (host3)
*DB-F1's* replica setup in host 2&3
- DB-F4-F1(host2)
- DB-F5-F1(host3)
*DB-F2's* replica setup in host 1&3
- DB-F6-F2(host1)
- DB-F7-F2(host3)
*DB-F3's* replica setup in host 1&2
- DB-F8-F3(host1)
- DB-F9-F3(host2)
Later we introduced one more host "4" for Disaster Recovery . All split
forests from host 1,2 & 3 are replicated in host-4 as follows.
DB-F10-F1 - Replica for *DB-F1*
DB-F11-F2 - Replica for *DB-F2*
DB-F12-F3 - Replica for *DB-F3*
*Test scenario:*
Hosts - 1,2 & 3 are down. Only Host-4 is up. And App service(HTTP) should
work.
*Expectation:*
Host-4 alone is able to handle the data.
*Issues:*
- The fail over his not happened to host-4.
- Admin page in Host-4 couldn't be loaded.
- HTTP-API in Host-4 doesn't seem working.
*Approach #2 - Two Clusters*
In this way, I have created 2 clusters.
- Cluster #1 has Host 1,2 &3.
- Cluster #2 has Host 4
*Test scenario:*
In cluster #1 all hosts are down
*Expectation:*
Host-4 in cluster #2 alone is able to handle the data. And App
service(HTTP) should work.
*Issue:*
- The fail over is not happened to cluster #2.
- HTTP-API in Host-4 doesn't seem working.
Based on my testing both approaches were failed. Looking for the suggestion
to setup the fail over model in correct way.
Thanks
Kalidoss.V
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