Next, we must pick the size of our VPS. This determines the amount of resources (CPU, memory, storage, and bandwidth) that are available to us.
Elasticsearch is very memory-intensive, and their official guide suggests using machines with 16-64 GB of memory. However, that is very costly. For this book, picking a VPS with at least 4 GB of RAM should suffice.
We can ignore the backups and block storage options.
Block storage is extra disk space that can be associated with our VPS. For example, if we are hosting a file server or Image API, we may want to add extra disk space to store these files/images; purchasing pure disk space is much cheaper than running a VPS with an operating system.
