On Tue, Oct 4, 2016 at 7:47 AM, Heikki Linnakangas <hlinn...@iki.fi> wrote: > 1. The first patch changes the way we store the logical tapes on disk. > Instead of using indirect blocks, HFS style, the blocks form a linked list. > Each block has a trailer, with the block numbers of the previous and next > block of the tape. That eliminates the indirect blocks, which simplifies the > code quite a bit, and makes it simpler to implement the pause/resume > functionality in the second patch. It also immediately reduces the memory > needed for the buffers, from 3 to 1 block per tape, as we don't need to hold > the indirect blocks in memory.
Doesn't that make prefetching more than a buffer ahead harder? -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers