On Sun, 19 Nov 2023 at 18:48, Anna Schumaker <schumaker.anna@xxxxxxxxx> wrote: > > Hi, > > On Sun, Nov 19, 2023 at 12:38 PM Cedric Blancher > <cedric.blancher@xxxxxxxxx> wrote: > > > > Good evening! > > > > How does READ_PLUS differ from READ? Has anyone made a simpler > > presentation (PowerPoint slides) than the RFCs? > > No slides, but at a high level READ_PLUS can compress out long ranges > of zeroes in a read reply by returning a HOLE segment instead of the > actual zeroes. It's perfectly valid for the server to skip the zero > detection and return everything as a data segment, however. So how do you differ between 1. a hole, aka no filesystem blocks allocated 2. a long sequence of valid data with all zero bytes in them Ced -- Cedric Blancher <cedric.blancher@xxxxxxxxx> [https://plus.google.com/u/0/+CedricBlancher/] Institute Pasteur
