Cloud Computing, Mobile and Other Modern Technologies

Toddy Mladenov

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Top Stories by Toddy Mladenov

As already described in the previous few articles NIST defines three different service models for the cloud - IaaS, PaaS and SaaS. However if you look at the Wikipedia article about cloud computing you will notice that there are quite a few more "as-a-service" models mentioned there. Lot of vendors are using those to differentiate their offerings but there are two problems that arise: First, those additional models are not officially recognized by any standardization authority and Second, and maybe more important, those new acronyms add to the confusion among the novice cloud users The proliferation of service models confuses even people with long experience with the cloud and doesn't help with the adoption. If you look closely you will notice that all of the new "as-a-service" models are just a subset of one of the three main service models - IaaS, PaaS and SaaS. Le... (more)

Determining the Cost of Downtime

Last week's Joyent outage brought us thinking how many IT teams make the effort what is the meaningful downtime that will not have significant impact on their business. In this post I will not discuss this particular outage although it is a yet another good example for improving the IT practices and processes but will concentrate on an important step in the Business Impact Analysis (BIA) that is a prerequisite for Disaster Recovery - namely the Cost of Downtime. Very often because the lack of understanding of the overall IT application portfolio the cost of downtime is calculate... (more)

What Are Good RTO and RPO?

Experiencing downtime is not something that companies wish for but as we have seen lately it is something that we hear quite often about. Interestingly enough very few enterprises, especially in the Small and Medium Business area, spent enough time to work out good procedures for recovery of their IT systems and applications. The recovery procedures should always be driven by the business needs, and this is the part where lot of IT departments are failing and as a result the recovery turns out to be reactive procedure that is triggered by the issue, results in a chaotic recover... (more)

Backup for Dynamic Workloads | @CloudExpo #DataCenter #DevOps #SDN

Architecting Backup Infrastructure for Dynamic Workloads in the Cloud Recently I had to design the backup infrastructure for cloud workloads for a client in order to ensure that we comply with the Business Continuity and Disaster Recovery standards they have set. However, following traditional IT practices in the cloud quite often poses certain challenges. The scenario that we had to satisfy is best shown in the picture below: The picture is quite simple: Application servers have a backup agent installed The backup agent submits the data that needs to be backed up to the media se... (more)

AWS Outage and High Availability | @DevOpsSummit #SDN #AWS #Monitoring

After yet another cloud outage yesterday (see AWS’s S3 outage was so bad Amazon couldn’t get into its own dashboard to warn the world) the world (or at least its North American part) once again went crazy how dangerous the cloud is and how you should go build your own data center because you know better what is good for your business. Putting aside all the hype as well as some quite senseless social media posts about AWS SLAs, here is our thought process for developing highly available cloud services or more importantly making conscious decisions what our services’ SLAs should b... (more)