Hi Lars<br><br>I'm usinng 8.4.1<br><br>[root@server1 ~]# service drbd status<br>drbd driver loaded OK; device status:<br>version: 8.4.1 (api:1/proto:86-100)<br><br>Fred<br><br><br><div class="gmail_quote">On Thu, Feb 2, 2012 at 2:15 PM, Lars Ellenberg <span dir="ltr"><<a href="mailto:lars.ellenberg@linbit.com">lars.ellenberg@linbit.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On Wed, Feb 01, 2012 at 10:18:25PM +0100, Andreas Kurz wrote:<br>
> On 02/01/2012 05:15 PM, Frederic DeMarcy wrote:<br>
> > Hi Andrea<br>
> ><br>
> > Commenting out "csum-alg" doesn't seem to make any noticeable difference...<br>
> > However commenting out "data-integrity-alg" and running Test #2 again<br>
> > increases the throughput from ~ 61MB/s to ~ 97MB/s !<br>
> > Note that I may well run into the 1Gb/s crossover link limit here since<br>
> > my network tests showed ~ 0.94 Gb/s<br>
> ><br>
> > Also Test #1 was wrong in my email... It should have been split in 2:<br>
> > Test #1<br>
> > On non-DRBD device (/dev/sda)<br>
> > # dd if=/dev/zero of=/home/userxxx/disk-test.xxx bs=1M count=4096<br>
> > oflag=direct<br>
> > Throughput ~ 420MB/s<br>
> ><br>
> > DRBD partition (/dev/sdb) on primary (secondary node disabled)<br>
> > Using Base DRBD config<br>
> > # dd if=/dev/zero of=/var/lib/mysql/TMP/disk-test.xxx bs=1M count=4096<br>
> > oflag=direct<br>
> > Throughput ~ 205MB/s<br>
><br>
> Is the result the same if you execute a "drbdadm invalidate-remote<br>
> mysql" on the primary before doing the "single node" test? .... that<br>
> would disable activity log updates ...<br>
<br>
</div>... with recent enough versions of DRBD.<br>
Only the OP seems to be using 8.3.7.<br>
Maybe you should consider an upgrade?<br>
<span class="HOEnZb"><font color="#888888"><br>
<br>
--<br>
: Lars Ellenberg<br>
: LINBIT | Your Way to High Availability<br>
: DRBD/HA support and consulting <a href="http://www.linbit.com" target="_blank">http://www.linbit.com</a><br>
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