cloud

I am migrating my Java,Tomcat, Mysql server to AWS EC2. I have already attached EBS volume for storing MySql data. In my web application people may upload images. So I should persist them. There are 2 alternatives in my mind: Save uploaded images to EBS volume. Use the S3 service. The followings are my notes, please be skeptic about them, as my expertise is not on servers, but software development. EBS plus: S3 storage is more expensive. (0.15 $/Gb > 0.1$/Gb) S3 plus: Serving statics from EBS may influence my web server's performance negatively. Is this true? Does Serving images affect server

I have an EC2 instance with "instance store" device as a root device. Now, I would like to attach an EBS volume to that same instance, only that I want it to be the root device. Is that possible? What happens to the instance store device in such case? Thanks in advance You could migrate your running instance to an EBS backed AMI. Here's how I did it: Boot up a regular S3 AMI backed instance (or since you've already got an instance you're happy with, use that) Make an EBS volume of the same size as your root sda1 partition (currently the default is 10G for an m1.small and possibly others)

We are working on rewriting our existing RIA and redesigning our database to re-architect it's design. Now we have 2 opinions about database: (This choices are for SaaS based hosting.) 1) Individual database for each customer. 2) Single DB for all customers. We are expecting good amount of data, some of our customers have db size ranging from 2GB to 10GB. # of tables are around 100. Can I get an answer about which choice we shall go for? We are not thinking about NoSQL solution as of now but we are planning to support about 4-5 databases with JPA (Java Persistence API) which includes MySQL,

I did as following MySQL 5.1 database added. Please make note of these credentials: Root User: xxxxxxx Root Password: xxxxxxx Database Name: php Connection URL: mysql://$OPENSHIFT_MYSQL_DB_HOST:$OPENSHIFT_MYSQL_DB_PORT/ You can manage your new MySQL database by also embedding phpmyadmin-3.4. The phpmyadmin username and password will be the same as the MySQL credentials above. phpMyAdmin 3.4 added. Please make note of these MySQL credentials again: Root User: xxxxxxx Root Password: xxxxxxx URL: https://php-doers.rhcloud.com/phpmyadmin/ and i try to connect db using bellow PDO code .but it does

I've got an android app that I am thinking about porting to Delphi but I can't see a way to interface with GCM. I am thinking I would possibly have to run the GCMBaseIntentService in java and interface with the delphi shared object? Alternatively, I am looking for a way to do push notifications in a Delphi Xe5 android app. You interface Java with Delphi using JNI. The JNI allows you to call in both directions: Java to Delphi or Delphi to Java. So you can extend your Delphi applications with Java classes . For implementing what you want on Android, doing it in Java will be the easier path to

I wanted to know about the difference about cloud computing and distributed computing. I read an article about cloud computing and got a feeling that somewhere there is a relation between cloud computing and distributed computing and so wanted to ask about difference between technologies. Also if someone could point me to useful resources for cloud computing, it would be highly appreciated. Thanks In my mind what defines cloud computing is that the underlying compute resources (storage, processors, RAM, load balancers, etc) of cloud-based services and software are entirely abstracted from the