Cloud Zones

Availability Zones

An Availability Zone is the largest organisational unit within a Testlabs Cloud deployment.  Typically a datacentre (DC) implementation will contain a single Zone, but there are no hard and fast rules and a DC can contain multiple Zones.  By structuring our cloud into geographical Zones, virtual instances and data storage can be placed in specific locations in order to comply with an organisation’s data storage policies etc.

An Availability Zone consists of at least one Pod, and Secondary Storage, which is shared by all Pods in the Zone. Zones are visible to end users, who can then choose which Zone they wish to create their virtual instances in.  A public Zone is visible to all users, but private Zones can also be created which are then only available to members of a particular domain and its associated sub-domains.

A Pod is a selection of hardware configured to form Clusters.  Typically a Pod is a rack containing one or more Clusters, and a Layer 2 switch architecture which is shared by all Clusters in that Pod.  End users are not aware, and have no visibility of Pods.

Depending on Customer requirements, Testlabs Virtual Machines can be deployed in different geographic locations referred to as “Zones,” depending on the customer's requirements.


CloudStack resource hierarchy

 

Cloud Zones

Zone 1 - Basic Networking

Zone 1 uses basic cloud instance with a single network interface and a public IP obtained from DHCP.

Zone 1 Pod 1

Zone 1 Pod 1 consists of a 10 node HP Blade cluster. It uses NFS 1GB storage for both primary storage (where your instance is located) and secondary stoage - where snapshots and templates are kept. Both primary and secondary storage is provded by an EMC SAN on 2 serperate file system exports.

Zone 1 Pod 2 consists of a 20 node HP Blade cluster. It uses NFS 1GB storage for both primary storage (where your instance is located) and secondary stoage - where snapshots and templates are kept. Both primary and secondary storage is provded by an EMC SAN on 2 serperate file system exports.

Zone 2 - Advanced Networking

Zone 2 Pod 1

Zone 2 Pod 1 consists of a 2 node SUN cluster with 1TB of memoary. It uses Fiber Channel 8GB storage for primary storage (where your instance is located) and 1GB secondary stoage - where snapshots and templates are kept.  Primary by a EMC SAN LUN, NFS is provided by a EMC file system export.