Dragonfly SSD auto-tiering: Command to check Data is in-memory or on SSD

[Revathy-Sarma]

Hello!

I am new to DragonFly and just started using the SSD Auto tiering feature of it. I assume it is similar to RoF, where the cold data is moved to SSD and once it is accessed using some redis command, it moves upto memory. I am trying to see this in action, is there a way or command by which I can check if a key is present in memory or has been moved to SSD?

[kostasrim]

Hi @Revathy-Sarma , you can try DEBUG OBJECT key_name and if the item is in SSD there should be an entry on the output spill_len.

Otherwise, general stats are collected and can be checked via INFO command. Not sure how many stats related to ssd we have but you can check it out yourself :)

Not sure if @romange has anything to add here