title: What exactly is Gemfire?
body: <p>I have been studying 'in-memory data grids' and saw the term 'gemfire'. I'm confused. It seems that gemfire is a term to refer to technologies that store and manipulate data like a database but in the computer memory, isn't it? What exactly is gemfire?</p>
  
  <p>Which technologies can I use to work with 'in-memory data grids' in Node.js?</p>
  
  <p>I saw some applications, like 'Apache Geode' and 'Pivotal gemfire'. How do I work with them? Is it like work with some cache technologies (like Redis or Memcached)? In geode's case, are the data only accessed through an API or are there other ways to access this one?</p>