Hey @loveworldlovesky ,
We have two experimental functions which allow to do this: block_new_chunks and allow_new_chunks. First function prevents creating new chunks on a particular data node, but updates for existing chunks are still going.
I believe those functions are not documented unfortunately, so I’ll share the link to the definition: https://github.com/timescale/timescaledb/blob/main/sql/ddl_experimental.sql#L15