3. Disadvantages of Cloud Computing

Disadvantages of Cloud Computing

Someone in the blogpost has commented this:

1) Downtime => Disagree completely. What are you comparing this >to? On-premise or private environments? these suffer from extended >downtime too! I believe that if architected it correctly,cloud "solves" >the problem with extended downtime, e.g. multi-az and multi-region >deployments.

2) Cloud security and privacy => Again disagree. In 2015 we see a >trend of customers moving to public cloud to "enhance" their >security posture. With the available controls around auditing (Cloudtrail), AAA (IAM and AD Premium), encryption (AWS KMS) >and network isolation (VPC) services; and indeed the right >architecture there is strong argument to suggest cloud deployment >has the advantage over on-prem deployment when it comes to >security.

3) Vulnerability to attack => unfortunately I also disagree. This is >related to the point above, but just being in the cloud doesn't mean >you are fundamentally more vulnerable.

4) Limited control and flexibility => Really!!! There might be some >edge cases where having a service hosted in cloud might not be very >flexible. However for the most part and especially in the case of the >big players, AWS and Azure and IaaS in particular, you get more >control and flexibility than on-prem. In fact flexibility is one of the >cloud benefits.

5) Platform dependencies => This is true, to get the most of any of >the cloud providers you have to accept the small risk of some >vendor lock-in e.g. AWS cloudformation is wonderful but locks you >in. Having said that over the last few years there is a trend of some >cross vendor compatibility becoming available, e.g. GCE cloud >storage is compatible with AWS S3.

6) Cost => I disagree with the blanket statement that cost of cloud >is a disadvantage, it depends on many things such as the workload, >its architecture and indeed as you mentioned the size. Yes, there >might be some cases where hosting an application in the cloud >might be more expensive, but from my experience this is the >exception rather than the norm.

Hatim Abdalla Cloud Architect Cloudreach

What's your overall opinion?

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