The current discourse on disaggregated compute and storage in data infra says local disk is bad. I think this lacks nuance. Local persistent disk (e.g. EBS) is bad. Ephemeral local disk should be embraced as a block cache for reads and staging of writes to durable storage. The cost/op is a win.

I made an infra engineer starter pack. Folks posting about databases, stream processing, durable execution, orchestrators, service meshes, and more.

go.bsky.app/SCZe42X