Can I use Aerospike without a memory?

Can I use Aerospike without memory like another NoSQL DB? (e.g. MongoDB…)

I want to store both keys and data on SSD.

Is it possible?

No, Aerospike doesn’t support running indexes from disk.

It depends on what you mean “without a memory”. Technically, Aerospike doesn’t store the data in memory by default - but just a small (64 bytes) primary index reference tree. Without creating any secondary keys, or setting your storage engine to in-memory - that’s pretty cheap.