• read b_R pages of relation R into buffers
• while R is buffered, read b_S pages of S

Typical-case scenario: b_R > N-2

• read ceil(b_R/N-2) chunks of pages from R
• for each chunk, read b_S pages of S

Cost   =   b_R + b_S . ceil(b_R/N-2)

Note: requires r_R.r_S checks of the join condition