Note: This blog describes resizing of classic Elasticsearch clusters no longer offered to new Qbox users. The information provided below is deprecated for new Qbox users with Supergiant AWS clusters.
Auto-scaling has been a frequent-request feature since the inception of the Qbox service because auto-scaling with Elasticsearch isn’t as easy as is commonly thought.
Horizontal scaling up is trivial, of course, and is one of the primary benefits of this technology. Automatic scaling down is typically more troublesome and-if not done carefully-rebalancing/reindexing carry an intrinsic computational overhead that dramatically affects performance. Meanwhile, our nodes-by-the-compute-hour model makes vertical scaling a potentially expensive prospect.
Taking all of this into consideration, today we announce a vertical resizing feature addition that is available on your dashboard. Now you can easily resize vertically by migrating to bigger VMs that have more resources. This gives you more flexibility beyond the horizontal scaling that is already available (adding nodes to an existing cluster).