SAIL 0.7: STATELESS COMPUTE, DURABLE JOB STATE

Summary from the TLDR Data newsletter

Sail 0.7 pushes Spark-style intermediate state toward object storage with blocking shuffle and checkpoint support. It persists shuffle outputs as compressed Arrow streams so downstream task regions retry without cascading upstream failures, while checkpointing keeps iterative jobs from rebuilding long query plans. The design targets stateless workers, smaller clusters, and better resilience under preemption.