Disaster Recovery
What virtualization environment does this work in?
Vmware
Describe the difference between multi controller architecture and dual controller?
Dual controller: it allows you to scale up as you add drives, but it isn't sustainable when you need to add additional compute. You usually have to bring in an entirely new appliance into your environment as it is not equipped to scale out, or you have to sacrifice compute for capacity.
Multi: you still have 2 controllers, but this time as you fill capacity, you're able to purchase a separate brick pooled in one cluster with scale up and out capabilities. Controllers between the two bricks can also communicate with each other and as a result there is no performance degradation.
Explain the 3 different types of cloud.
Public-company uses a public cloud company to manage and deploy their applications
Private-IT services are provisioned over private IT infrastructure ; just you and your company, so you’re not sharing space with other companies
Multi-mult cloud services (combo of any 2+ : IaaS, PaaS, Saas ; private & public ; hybrid ; mult cloud providers)
What do RPO and RTO stand for? And what do they measure?
Recovery Point Objectives - amount of data lost from failure, measured as the amount of time from a disaster event.
Recovery Time Objectives - Targeted amount of time to restart a business service after a disaster event.
Explain how we get 6 9s of availability and what that means.
Powermax offers 6 9s of availibility. That means we're promising less than 32 seconds of downtime a year. We ensure this by fault isolation and non disruptive upgrades with our multi controller architecture.
Fault isolation means if part of your brick fails, you no longer have to run at 50% strength, like you do in dual controller. Like the name suggests, the failure is isolated, therefore you can still continue to perform with 95% of the brick's capabilities, and avoid downtime and latency.
With dual architecture you would have to go offline when upgrades were made, but that is no longer the case with powermax. We can seamlessly perform upgrades without disrupting production.
What is VCF & how does it enable to multi cloud approach?
-Vsan, nsx, vsphere, sddc manager (Explain those) & vrealize suite is extra
-vmware cloud foundation based on vmware software
-can do multi cloud thru VCF
-consistency across cloud platforms ; drive agility into environment and move apps across platforms easily ; bring tenets of cloud but reduce complexity of multi cloud
Tell the Dell EMC Nirvana story.
Like for like story.
What does SRDF stand for and what does it do for business continuity?
The Symmetrix Remote Data Facility (SRDF) maintains real-time (or near real-time) copies of data on a production storage array at one or more remote storage arrays. SRDF has three primary applications: Disaster recovery, High availability, Data migration. SRDF replication allows for the gold standard of active-active data centers so you never have to endure a blimp in the system when disaster strikes.
What are the 5 tenets of the cloud?
-measured service: paying for what you need model
-rapid elasticity: scale as you need (Add or reduce)
-resource pooling: pool all resources w/in infrastructure
-on demand self service: access resources thru portal, rather than thru a person
-broad network access: access it wherever