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Forum Newbie
Group: Forum Members
Last Login: Tuesday, August 05, 2008 11:39 AM
Posts: 1,
Visits: 10
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This is about multi-site failover.
I'm using VSAs for branch offices that have 2 ESX servers to take advantage of the HA features of ESX. Failover Manager automates the process of quorum maintenance for a single management group. When I add additional sites, do I need to add additional failover managers? Or will a single failover manager provide quorum for multiple sites.
ie. Which management structure to use:
A.
A-Management-Group
Failover_Site (failover manager runs in the data center)
Site_1 (contains 2 VSAs at a branch office)
Site_2
Site_3
B.
Site1-Management-Group
Failover_Site
Site_1
Site2-Management-Group
Failover_Site
Site_2
Site3-Management-Group
Failover_Site
Site_3
Option A is easier to manage and only requires a single instance of failover manager.
Option B would require separate instances of failover manager for each VSA pair in the site.
Or, is failover manager unneccessary after I have more than 3 VSAs?
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Supreme Being
Group: Moderators
Last Login: Yesterday @ 2:22 PM
Posts: 101,
Visits: 354
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You only need, and can only have, one Failover Manager per Management group. And yes, once you have 3 storage nodes or more in a management group, you no longer need a Failover Manager at all.
For your branch offices to be in the same Management Group as your Data Center you need fast (at least 100Mb / fast Ethernet) links between those locations.
It is more typical that the links to your branch offices are too slow to maintain a single management group so you probably are looking at....
Data Center
Management_Group_A
Failover Manager (if you have only 2 storage nodes)
X Storage Nodes
Site_1
Management_Group_1
Failover Manager
2 VSA
Site_2
Management_Group_2
Failover Manager
2 VSA
Site_3
Management_Group_3
Failover Manager
2 VSA
Those management groups can all be seen / accessed in the CMC at the same time from anywhere with internet connectivity to all sites. It would actually look much like my text tree above in the UI tree.
Hope that helps.
Adam C
Product Manager
LeftHand Networks
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