<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
On 06/01/2012 03:00 PM, Alexey I. Froloff wrote:
<blockquote cite="mid:20120601190056.GD20918@raorn.name" type="cite">
<pre wrap="">On Fri, Jun 01, 2012 at 01:50:55PM -0500, Michael Cronenworth wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Not a single person who has claimed a performance or semantic win for
this /tmp move has replied when asked for proof.
</pre>
</blockquote>
<pre wrap="">$ time dd if=/dev/zero of=/tmp/file bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 4.95536 s, 2.2 GB/s
dd if=/dev/zero of=/tmp/file bs=1M count=10240 0.00s user 3.44s system 69% cpu 4.956 total
No visual shanges in system behavior.
</pre>
</blockquote>
How much memory do you have to be able to write 11GB to /tmp ???<br>
<blockquote cite="mid:20120601190056.GD20918@raorn.name" type="cite">
<pre wrap="">
$ time dd if=/dev/zero of=/var/tmp/file bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 59.2188 s, 181 MB/s
dd if=/dev/zero of=/var/tmp/file bs=1M count=10240 0.00s user 54.26s system 91% cpu 59.239 total
SSD disk. System becomes unresponsive for a couple of tens of seconds.
$ time dd if=/dev/zero of=$HOME/file bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 75.1548 s, 143 MB/s
dd if=/dev/zero of=$HOME/file bs=1M count=10240 0.01s user 71.30s system 94% cpu 1:15.16 total
SATA disk. System becomes less responsive for a couple of seconds.
Does that counts as a proof? ext4 on /var and /home.
</pre>
</blockquote>
<br>
<br>
<div class="moz-signature">-- <br>
Stephen Clark<br>
<b>NetWolves</b><br>
Director of Technology<br>
Phone: 813-579-3200<br>
Fax: 813-882-0209<br>
Email: <a class="moz-txt-link-abbreviated" href="mailto:steve.clark@netwolves.com">steve.clark@netwolves.com</a><br>
<a class="moz-txt-link-freetext" href="http://www.netwolves.com">http://www.netwolves.com</a><br>
</div>
</body>
</html>