Skip to main content

Enterprise customers and Cloud Adoption

A big fear among enterprise customers who want to adopt cloud is that
  1. Is my data secure?
  2. What if this site goes down for 3-4 hours?
  3. What if this startup shutdown business, what will happen to my data?
Recent downtimes from big companies as shown below instills a fear among mission critical busineses wanting to adopt cloud.
  1. Microsoft http://techcrunch.com/2011/09/09/microsofts-cloud-briefly-evaporates-leaves-up-to-365-million-users-without-access-for-four-hours/
  2. Amazon http://eu.techcrunch.com/2011/04/21/amazon-ec2-goes-down-taking-with-it-reddit-foursquare-and-quora/
  3. Google App Engine http://techcrunch.com/2011/09/09/google-explains-its-google-docs-outage/
While moving to cloud makes sense economically but having one bad day can make people go back to traditional methods of manging own infrastructure. Think of a hospital storing all records in cloud, it cant afford a 2-3 hour downtime. There is a better solution to this and its by adopting the hybrid model and companies that will do it successfully will see far more growth in enterprise area. The idea is to have an on-premise cloud that syncs to the real cloud. This way even if the real cloud is down or goes out of business, the on-premise instance ensures business continuity.

Comments

Popular posts from this blog

RabbitMQ java clients for beginners

Here is a sample of a consumer and producer example for RabbitMQ. The steps are Download Erlang Download Rabbit MQ Server Download Rabbit MQ Java client jars Compile and run the below two class and you are done. This sample create a Durable Exchange, Queue and a Message. You will have to start the consumer first before you start the for the first time. For more information on AMQP, Exchanges, Queues, read this excellent tutorial http://blogs.digitar.com/jjww/2009/01/rabbits-and-warrens/ +++++++++++++++++RabbitMQProducer.java+++++++++++++++++++++++++++ import com.rabbitmq.client.Connection; import com.rabbitmq.client.Channel; import com.rabbitmq.client.*; public class RabbitMQProducer { public static void main(String []args) throws Exception { ConnectionFactory factory = new ConnectionFactory(); factory.setUsername("guest"); factory.setPassword("guest"); factory.setVirtualHost("/"); factory.setHost("127.0.0.1"); factory.se...

Spring 3.2 quartz 2.1 Jobs added with no trigger must be durable.

I am trying to enable HA on nodes and in that process I found that in a two test node setup a job that has a frequency of 10 sec was running into deadlock. So I tried upgrading from Quartz 1.8 to 2.1 by following the migration guide but I ran into an exception that says "Jobs added with no trigger must be durable.". After looking into spring and Quartz code I figured out that now Quartz is more strict and earlier the scheduler.addJob had a replace parameter which if passed to true would skip the durable check, in latest quartz this is fixed but spring hasnt caught up to this. So what do you do, well I jsut inherited the factory and set durability to true and use that public class DurableJobDetailFactoryBean extends JobDetailFactoryBean {     public DurableJobDetailFactoryBean() {         setDurability(true);     } } and used this instead of JobDetailFactoryBean in the spring bean definition     <bean i...

Killing a particular Tomcat thread

Update: This JSP does not work on a thread that is inside some native code.  On many occasions I had a thread stuck in JNI code and it wont work. Also in some cases thread.stop can cause jvm to hang. According to javadocs " This method is inherently unsafe. Stopping a thread with Thread.stop causes it to unlock all of the monitors that it has locked". I have used it only in some rare occasions where I wanted to avoid a system shutdown and in some cases we ended up doing system shutdown as jvm was hung so I had a 70-80% success with it.   -------------------------------------------------------------------------------------------------------------------------- We had an interesting requirement. A tomcat thread that was spawned from an ExecutorService ThreadPool had gone Rogue and was causing lots of disk churning issues. We cant bring down the production server as that would involve downtime. Killing this thread was harmless but how to kill i...