<div dir="ltr">hi,<div><br></div><div>On Sun, Apr 14, 2013 at 5:33 AM, Leif Pedersen <span dir="ltr"><<a href="mailto:bilbo@hobbiton.org" target="_blank">bilbo@hobbiton.org</a>></span> wrote:<br><div class="gmail_extra">
<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>What do you guys think? Am I wasting my time, or is it worth the effort to avoid some filesystem overhead for cache IO? I thought that perhaps allowing the storage to be a raw block device might also be useful for some people (maybe my future self) who want to put it on a dedicated SSD.</div>
</div></blockquote><div><br></div><div style>We tried disabling those checks and running Varnish on raw Linux IO devices a couple of years back. Not completely raw IO devices but those that still keep the page cache active. The results where rather disappointing with a significant reduction in performance. I guess the more aggressive preemptive caching in the filesystem help out a bit more. </div>
<div style><br></div><div style>It is not a costly experiment to conduct. Go for it. The VM your playing with is a totally different one.</div><div style><br></div></div>-- <br><div style="font-size:12.727272033691406px;margin:5px 15px 0px 0px;padding-bottom:5px;color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255)">
<table border="0" cellpadding="0" cellspacing="0" style="text-align:start;font-size:12px;line-height:1.5em;font-family:'Helvetica Neue',Arial,sans-serif;color:rgb(102,102,102);width:550px;border-top-width:1px;border-top-style:solid;border-top-color:rgb(238,238,238);border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:rgb(238,238,238);margin-top:20px;padding-top:5px;padding-bottom:5px">
<tbody><tr><td width="100" style="font-family:arial,sans-serif;margin:0px"><a href="http://www.varnish-software.com/" style="color:rgb(17,85,204)" target="_blank"><img src="http://www.varnish-software.com/static/media/logo-email.png" style="float:left;margin-left:10px"></a></td>
<td style="font-family:arial,sans-serif;margin:0px"><b style="font-size:14px;color:rgb(34,34,34)">Per Buer</b><br>CEO | Varnish Software AS<br>Phone: +47 958 39 117 | Skype: per.buer<br><span style="font-weight:bold">We Make Websites Fly!<br>
<br></span></td></tr></tbody></table><div></div></div><div style="font-size:12.727272033691406px;margin:15px 0px;clear:both;color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255)"></div>
</div></div></div>