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<p class=MsoNormal>Hello,</p>
<p class=MsoNormal> </p>
<p class=MsoNormal><span>we use two Citrix XenServer 5.5 with DRBD
and DRBD-Proxy and we have slow HDD performance.</span></p>
<p class=MsoNormal><span> </span></p>
<p class=MsoNormal><span>We use an extra NIC for DRBD on both
servern and the connection for DRBD is a SDSL with 2MBit sym.</span></p>
<p class=MsoNormal><span>For dom0 is dom0_mem configured with
2048MB.</span></p>
<p class=MsoNormal><span> </span></p>
<p class=MsoNormal><span>Here is our /etc/drbd.conf:</span></p>
<p class=MsoNormal><span> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>global { usage-count yes; }</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>common {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> protocol A;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> net {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> shared-secret "xenserver";</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> after-sb-0pri discard-zero-changes;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> after-sb-1pri consensus;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> after-sb-2pri disconnect;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> ping-timeout 20;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> }</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> disk {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> max-bio-bvecs 1;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> }</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> startup {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> # leave this disabled for now</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span><span style='font-family:"Courier New"'>become-primary-on
bornheim;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>
}</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> handlers {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> split-brain
"/usr/lib/drbd/notify-split-brain.sh";</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> }</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> syncer { rate 284k; }</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>}</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>resource drbd-sr {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> device /dev/drbd1;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> disk /dev/sda3;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> meta-disk internal;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> syncer {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> csums-alg md5;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> }</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> proxy {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> compression on;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> memlimit 1024M;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> }</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> on bornheim {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> address 127.0.0.1:7789;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> proxy on bornheim {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> inside 127.0.0.1:7788;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> outside 192.168.93.1:7788;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> }</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> }</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> on koeln {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> address 127.0.0.1:7789;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> proxy on koeln {</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span><span style='font-family:"Courier New"'>inside
127.0.0.1:7788;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>
outside 192.168.94.1:7788;</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>
}</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>
}</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>}</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>One VM is Debian Lenny with bonnie++.</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>Some tests with bonnie show this:</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>bonnie with drbd and primary/secondary
uptodate</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>Version 1.03 ------Sequential
Output------ --Sequential Input- --Random-</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> -Per Chr- --Block--
-Rewrite- -Per Chr- --Block-- --Seeks--</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>Machine Size K/sec %CP K/sec %CP K/sec
%CP K/sec %CP K/sec %CP /sec %CP</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>test 512M 13325 22 12646 1
275 0 46463 34 129431 1 2.4 0</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> ------Sequential
Create------ --------Random Create--------</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> -Create-- --Read---
-Delete-- -Create-- --Read--- -Delete--</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> files /sec %CP /sec %CP /sec
%CP /sec %CP /sec %CP /sec %CP</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> 16 +++++ +++ +++++ +++ +++++
+++ +++++ +++ +++++ +++ +++++ +++</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>test,512M,13325,22,12646,1,275,0,46463,34,129431,1,2.4,0,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>The VM’s (Windows Server 2000) are very
slow and hang sometimes.</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>We observed that the primary HDD’s
sometimes in use (flashing) and the secondary HDD’s permanently in use. And
there is much traffic on the DRBD network.</span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoPlainText><span>I don't know where the error is ... </span>Any
ideas ?</p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'> </span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-family:"Courier New"'>Thanks </span></p>
<p class=MsoNormal><span> </span></p>
<p class=MsoNormal><span> </span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Mit
freundlichen Grüßen</span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Dietmar
Simons</span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#365F91'>- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - -</span></p>
<p class=MsoNormal><b><span style='font-size:14.0pt;font-family:
"Arial","sans-serif";color:#365F91'> </span></b><b><span style='font-size:
14.0pt;font-family:"Arial","sans-serif";color:#365F91'>ican GmbH</span></b><span style='font-size:14.0pt;font-family:"Arial","sans-serif";color:#365F91'><br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
Wanheimer Str. 408<br>
47055 Duisburg<br>
Tel.: +49 (0) 203 73804 249<br>
Fax: +49 (0) 203 73804 300<br>
<span style='color:#365F91'> </span></span><a href="mailto:dietmar.simons@ican-gmbh.de"><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:blue'>ds@ican-gmbh.de</span></a><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#365F91'></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#365F91'> </span><a href="http://www.ican-gmbh.de/"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>http://www.ican-gmbh.de</span></a><span style='font-size:10.0pt;
font-family:"Arial","sans-serif";color:#365F91'></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#365F91'>- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - -</span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#365F91'> Geschäftsführer: Khodayar
Alambeigi</span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#365F91'> Registergericht: Amtsgericht
Duisburg, HRB9504</span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#365F91'> USt-IdNr. DE 202 074 039<br>
Steuer-Nr. 29/457/5113</span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#365F91'>- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - -</span></p>
<p class=MsoNormal> </p>
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