Requirements for clustering servers, Creating a server cluster – HP LeftHand P4000 SAN Solutions User Manual
Page 206
NOTE:
When using a Fibre Channel connection to a Microsoft Cluster a situation can occur
where a node that owns the witness disk in the Microsoft Cluster fails over, but does not fail back.
In this case, Microsoft failover cluster quorum is never at risk. If any additional failures occur that
require failover/failback of the witness disk to maintain failover cluster quorum, that failover
happens properly.
See the Microsoft TechNet article
for
more information.
Requirements for clustering servers
•
Minimum of two servers for a cluster
•
Same access level settings for all volumes assigned to the server cluster
•
For iSCSI: same load balancing setting for all servers
•
For Fibre Channel: one volume assigned to multiple servers in a cluster should have the same
LUN ID for each server
Creating a server cluster
1.
In the navigation window, select the Servers category.
2.
Right-click and select New Server Cluster.
3.
Enter a name and description (optional) for the server cluster.
4.
Do one of the following:
•
Click Add Server and select the server from the list of available servers that opens.
•
Click New Server and follow the instructions in either
“Planning server connections to
or
“Planning Fibre Channel server connections to
5.
Add the additional servers required for the server cluster, using either of the above methods.
6.
Optional: Next, click Edit Server Cluster Settings to verify that the server cluster settings are
the same for all servers and volumes.
NOTE:
The Server cluster Settings window opens automatically if inconsistencies are detected
in the settings for the servers and volumes.
7.
On the Server cluster Settings window, choose the proper settings for the server cluster.
a.
Ensure that each volume listed has the same access permissions.
b.
For iSCSI, select the appropriate radio button for the load balancing setting on each
server.
c.
For Fibre Channel, resolve any LUN conflicts that are displayed.
When the server cluster is created, you can view the results on the Servers Details tab and on Map
View tab shown in
206 Controlling server access to volumes