We are using Basic Elasticsearch v7.4 on a single node with nearly 2TB of data. We planning to increase our retention however we are constrained by it's storage capacity. While adding disks and using multiple data path is a choice is not a recommended one or else needs to use LVM which I found quite troublesome.
We are considering Data Tier and adding new nodes in different tier like 'cold' or 'frozen'. Is this the best method to achieve this ? I have tested cold tier but does this version of ES support frozen tier? We are not expecting the same search performance for very old data as recently created indices do. Is HDDs best option for node in these tiers to save cost? Is heap memory still a performance factor in these tiers?
What are some alternatives to storing big-data is ES if there is any?