One of the few things I do not like about the AWS EC2 service is that all available images (AMIs) used to to launch new instances require a root volume of at least 8 or 10 GB in size and all of them also have a single partition where the root filesystem is mounted on.
In my post The importance of properly partitioning a disk in Linux I discussed why in my opinion this approach is not appropriate and now I will address in a practical way how to divide those volumes into multiple partitions keeping the 8-10 GB base size or making them even smaller to save costs in case you want to deploy smaller servers that do not need as much storage space.
DanielPartitioning and resizing the EBS Root Volume of an AWS EC2 Instance
Sentilo is an open source software designed by openTrends for the exchange and processing of information from thousands of sensors and actuators, acting as an interface between them and the various applications that want to collect and make use of the information they provide. Thus, it fits well within the Smart City architecture and has the city of Barcelona as the main promoter. But Sentilo is not only made by and for the cities, but also for any organization that wants to implement an IoT application that requires deploying a smaller number of sensors and actuators, such as inside buildings or in the open field.
One of the main needs of a small business or startup is to have a reliable mail system with its own domain that helps differentiate on the Internet. Although there are lots of hosting plans offering free email accounts and even you could set up your own mail server, you are probably already used to mail services like GMail and would like to continue using it to also manage mail from your own domain without having to come to paid solutions such as G Suite (formerly Google Apps), which though inexpensive for the services you get in return, they represent an additional cost that your incipient project might not afford.
If this is your case you will be happy to know that thanks to the free tier offered by Amazon Web Services (AWS) in some of its services such as Amazon SES and Lambda, you can build a mail system at no cost that integrates seamlessly with your GMail free account, and at the same time allows you to send and receive mail from multiple mailboxes within your own domain.
DanielUse GMail with your own domain for free thanks to Amazon SES & Lambda
When we completely fill up an ext4 filesystem mounted on a partition hosted in an EBS volume of Amazon Web Services and we can not do anything to free space because we do not want to lose any of the stored data, the only solution is to grow up the volume and extend the associated partition up to 100% of its capacity to obtain free space again.
DanielHow to enlarge the size of an EBS volume in AWS and extend an ext4 partition