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vStart 1000v for Enterprise Virtualization using VMware vSphere: Reference Architecture
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8.6 Multipath Configuration
In the solution, VMware Native Multipath Plug-In (NMP) is used to provide multi-pathing. Path Selection
Plug-Ins (PSPs) run with the VMware NMP and are responsible for choosing a physical path for I/O
requests. Round Robin (VMW_PSP_RR) path selection algorithm is the recommended configuration for
Compellent Storage Center. Round Robin uses a path selection algorithm that rotates through all
available active optimal paths enabling load balancing across the paths. This ensures all the paths are
used to provide the maximum bandwidth and balance I/O across the paths/fabrics.
9 Management Infrastructure
Two PowerEdge R620 servers and one Force10 S55 1Gb Ethernet switch are used for management
infrastructure. The PowerEdge R620 servers are connected to the Force10 S4810 switches using
Broadcom 57810 Dual Port 10Gb Network Adapter. The servers are connected to the Compellent
storage through the Brocade 5100 switches using a QLogic QLA2562 8Gbps Fibre Channel Card.
Note that the Compellent storage is shared between management cluster and compute cluster. The
Compellent storage must be sized so that sufficient bandwidth is allocated for both the management
VMs and compute VMs.
The PowerEdge R620 servers run VMware ESXi 5.0 hypervisor and are a part of the unique vSphere
Cluster. VMware High Availability is enabled in that cluster to provide HA for virtual machines.
Admission control is disabled in the VMware HA Cluster. If admission control is enabled, VMware HA
would prevent putting one of the management servers in maintenance mode, since this would violate
HA policy of having more than one active server in the cluster.
The following management components are installed as virtual machines in the management
infrastructure as illustrated in Figure 6:
 VMware vCenter Server
 Dell OpenManage Plugin for vCenter
 Dell Compellent Enterprise Manager
 VIS Creator
 Dell OpenManage Essentials
 VMware vCloud Connector Server
 VMware vCloud Connector Node
Compellent Plugin for vCenter is installed along with VMware vCenter client in VMware vCenter Server
VM. OpenManage Server Administrator Web Server is installed in the OME VM to enable one-to-one
management of ESXi servers.