<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Le 12 juil. 2013 à 19:35, Wayne Davison <<a href="mailto:wayned@samba.org">wayned@samba.org</a>> a écrit :</div><div><br></div><blockquote type="cite"><div dir="ltr">On Tue, Jul 9, 2013 at 9:46 AM, CM Fields <span dir="ltr"><<a href="mailto:cmfileds@gmail.com" target="_blank">cmfileds@gmail.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Is rsync speed limited to 160MB/sec read speeds due to the chunk read size? Or, are we seeing just a coincidence and the limitation is somewhere else?<br>
</blockquote><div><br></div>The fileio routines are usually reading 256K chunks except for the receiver, which tries to read 16K chunks (since it may be randomly accessing the file data in some cases).</div><div class="gmail_quote">
<br></div><div class="gmail_quote">Give the 3.1.0dev code a try -- it aligns its reads on 1K boundaries. That might help the speed. It also has better I/O throughput between processes.</div></div></div></blockquote><br><div>Hi Wayne,</div><div><br></div><div>Why don't you choose 4K boundaries alignment, as new hard drives now come with 4K physical blocks ?</div><div>It would also be still compatible with disks using 512B blocks (4096/512=8).</div><div><br></div><div>Thank you !</div><div><br></div><div>Best regards,</div><div><br></div><div>Ben</div></body></html>