| Title: | WinNT-Clusters |
| Notice: | Info directories moved to DECWET::SHARE1$:[NT_CLSTR] |
| Moderator: | DECWET::CAPPELLOF |
| Created: | Thu Oct 19 1995 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 863 |
| Total number of notes: | 3478 |
Hello,
Our customer is working with Digital Cluster for Windows NT with SQL
Server on one node and Lotus Notes on the second. They would like to add a
third server and build a cluster with Domino's cluster. Do you think
this sounds reasonable?
Digital Cluster for Windows NT
...........................................................
.
AlphaServer 1000A AlphaServer 1000A . Domino's
SQL Server ---- ----- Lotus Domino . Cluster
Server A ! ! Server B . <----
! ! ! . !
RA310 ! . !
........................................................... !
! !
! !
AlphaServer 1000A <----
Lotus Domino
Server C
In this way they would provide Failover to SQL Server and use the load
balancing features of the Domino's cluster.
It seems clear what would happen if Server A or C fail, but what kind
of failover would take place if Server B fail, Since all the services
would failover to Server A, would Domino's (Server C) know that he can now
failover to Server A instead of B? very confusing ...
I would appreciate your help. We are trying to determine if we need to
sell two servers instead of one (of course we NEED to sell two!), but we
need the technical reason of why ....
Katya
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 627.1 | might work ... | HYDRA::EGGIMANN | Tue Feb 18 1997 12:59 | 18 | |
Hi, I'm assuming you're using Lotus clustering when you refer to the Domino cluster on node A,C, and Windows NT clusters on node A,B. When node b fails, you'll need to startup a notes server process on node A and associate the floating ip address to this server process. (take a look at the Notes partitioned servers in advanced services on Domino) You'll also need to give it the same server name as the process running on node B. This should fool the clients into automatically connecting back into node A. This should also fool the Domino server on Node C into thinking its still talking and replicating update events to Node B. Interesting approach. Testing interoperability of Notes clusters (for load balancing) with WNT clusters was next on our list ... Let me know how this works out. Pete | |||||
| 627.2 | Which would failover first? | NEOV00::KLOPEZ | Ay Caramba! | Wed Feb 19 1997 11:37 | 18 |
If both cluster products were installed, which "failover" would take place
first?
The main advantage of the Digital Cluster is the shared disk, but then
you loose the load balancing, although we could balance manually with
two diferent databases.
Can failover be "turned off" for Lotus Domino and just leave the load
balancing capability?
BTW, we are going for two different servers (AlphaServer 4100), we now
need to find out what is more importante for our customer (load
balancing vs cost)
Katya
| |||||
| 627.3 | HYDRA::EGGIMANN | Tue Feb 25 1997 10:22 | 3 | ||
The wnt cluster failover would happen first. The Domino failover would not happen until the ip address and domino server advertised itself on the surviving wnt cluster node. | |||||