How vCloud Hybrid Service is Different: 10 Cloud Capabilities on vCloud Hybrid Service that don’t Exist on AWS
By Mathew Lodge
With vCloud Hybrid Service (vCHS), we’re firmly focused on solving enterprise customer cloud problems – especially making the transition from today’s investments in apps and data to a cloud future as easy as possible. And that means building a different kind of cloud – those that matter to enterprises. To make that very concrete for those familiar with Amazon Web Services (AWS), here are 10 things in vCHS to make that transition easier that you can’t do in AWS.
1. Free automatic availability monitoring and fast VM restart
vCHS includes hot standby redundant capacity to maximize the uptime of your application. It’s free and requires no configuration. vCHS automatically monitors all servers and if there’s a catastrophic failure, immediately re-starts all affected VMs on hot standby hardware in the same vCHS cluster. At reboot time, the VM’s file system is exactly as it was before the failure, preserving as much state as possible to allow the OS and application to recover quickly. It also has exactly the same network configuration – MAC addresses, IP addresses and so on – ensuring other VMs can communicate with the new VM without reconfiguration.
By contrast, AWS offers no redundant capacity, no automatic monitoring, and no fast VM restart. New EC2 instances don’t have the same MAC address and require extra configuration to get the same IP address. For redundancy you must buy extra instances, buy and manage a load balancer (assuming the app traffic can be load balanced), architect and code a state-sharing mechanism, buy and manage monitoring, and orchestrate VM re-start.
2. Free automatic proactive performance management
The same VMware technology that watches for server failure in vCHS also monitors the overall performance and health of servers. It’s free and there’s no configuration. If any particular server is overloaded, vCHS automatically live migrates VMs to a server with more capacity. There is no downtime and no “pausing” of the application – it just keeps on running.
The variability of AWS performance is legendary, leading users to devise cunning strategies to juice performance. One example: start more AWS instances than you need, conduct performance tests to see which ones perform well, and kill off the poorly performing instances. Rinse and repeat until you have enough working instances, and continue to monitor instances during their lifetime. With vCHS, this “Darwinian instance infanticide” isn’t necessary.
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