VMware SOFTWARE REPOSITORY FOR WINDOWS 1.1 Manuel d'utilisateur télécharger pdf (Page 26)

Reference Architecture for Active System 1000 with VMware vSphere

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Performance: Dell Compellent SC8000, with the dual-controller configuration, 8 Gb Fibre Channel

interconnects provides high bandwidth for data flows. This bandwidth is complemented with a large

variety of drives in multiple speeds and sizes. The SC8000 controllers also use virtual port IQNs and

WWNs, thereby enabling higher throughput and fault tolerance.

Drive Types and Automated Tiered Storage: In the Active System 1000v solution, the number of

storage enclosures and the drives in the enclosures can be customized based on customer

requirements. Administrators can mix SSD and SAS drives in the same system, as well as SAS drives with

the same form factor (but different speeds and capacities) in the same storage enclosure. A maximum

of 16 enclosures is supported in Active System 1000v.

High speed drives are assigned to higher tiers and low speed drives to lower tiers. Compellent Storage

Center automatically configures RAID levels for these tiers and automatically moves the data between

the tiers based on access patterns. Compellent Fluid Data storage dynamically moves data to the

optimal tier based on actual usage. The most active blocks reside on high-performance SSD, or SAS

drives, while infrequently accessed data migrates to lower-cost, high-capacity SAS or SATA drives. For

more details, refer to the Automated Tiered Storage web page. Automated Tiered Storage requires

Data Progress licenses for Compellent.

RAID Array Design: Dell Compellent SC8000 supports RAID 5, 6, and 10. The Compellent Storage Center

will dynamically set up RAID based upon the demands of applications accessing data on the storage

tier(s).

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 is 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.

7 Management Infrastructure

Two PowerEdge R620 servers and one Dell Networking S55 1Gb Ethernet switch are used for

management infrastructure. The PowerEdge R620 servers are connected to the Dell Networking S4810

switches using Broadcom 57810 Dual Port 10Gb Network Adapters. The servers are connected to the

Compellent storage through the Brocade 6510 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 5.1 Update 1 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.

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VMware SOFTWARE REPOSITORY FOR WINDOWS 1.1 Manuel d'utilisateur Page 26