Aggiornamento - Virtual Machine Density Flexibility in WS08R2 Failover Clustering
Vi segnalo il Blog Post di Steven Ekren, Senior Program Manager Clustering & High-Availability, riguardo il recente cambio di policy riguardo il numero massimo di Virtual Machines (supportato) in un Host Cluster:
Virtual Machine Density Flexibility in Windows Server 2008 R2 Failover Clustering
Interessante la tabella presa ad esempio e le note relative:
Supporting 1000 VMs will enable increased flexibility to utilize hardware that has the capacity to host more VMs per physical server while maintaining the high availability and management components that Failover Clustering provides.
Number of Nodes in Cluster
Max Number of VMs per Node
Average Number of VMs per active Node
Max # VMs in Cluster
2 Nodes (1 active + 1 failover)
384
384
384
3 Nodes (2 active + 1 failover)
384
384
768
4 Nodes (3 active + 1 failover)
384
333
1000
5 Nodes (4 active + 1 failover)
384
250
1000
6 Nodes (5 active + 1 failover)
384
200
1000
7 Nodes (6 active + 1 failover)
384
166
1000
8 Nodes (7 active + 1 failover)
384
142
1000
9 Nodes (8 active + 1 failover)
384
125
1000
10 Nodes (9 active + 1 failover)
384
111
1000
11 Nodes (10 active + 1 failover)
384
100
1000
12 Nodes (11 active + 1 failover)
384
90
1000
13 Nodes (12 active + 1 failover)
384
83
1000
14 Nodes (13 active + 1 failover)
384
76
1000
15 Nodes (14 active + 1 failover)
384
71
1000
16 Nodes (15 active + 1 failover)
384
66
1000
Note: There is no requirement to have a node without any VMs allocated as a “passive node”. All nodes can host VMs and have the equivalent to 1 node of capacity unallocated (total, across all the nodes) to allow for placement of VMs if a node fails or is taken out of active cluster membership for activities like patching or performing maintenance.
Vi invito a leggere interamente il post, comprese le domande più frequenti.
Buone ferie, ammesso le abbiate 
Simone
Risorse correlate
Aggiornamento - Requirements and Limits for VMs and Hyper-V R2
Requirements and Limits for Virtual Machines and Hyper-V in Windows Server 2008 R2
Virtual Machine Density Flexibility in Windows Server 2008 R2 Failover Clustering