<font size=2 face="sans-serif">Hello we have two clusters whith 2 nodes
each</font>
<br><font size=2 face="sans-serif">One whith SLES10SP2 ( kernel 2.6.16.60-0.34-xen
+ drbd 8.3.1)</font>
<br><font size=2 face="sans-serif">One Whith SLES11 (kernel 2.6.27.19-5-xen
+ drbd 8.3.1).</font>
<br><font size=2 face="sans-serif">No problem whith performance on both</font>
<br><font size=2 face="sans-serif">Your test is not accurate, if you copy
file, it is suppose there is a FS on drbd devices...</font>
<br><font size=2 face="sans-serif">Could you give the speed directly on
block device and after on the drbd device.</font>
<br>
<br><font size=2 face="sans-serif">Have you test whith the latest version
of drbd?</font>
<br>
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<td><font size=2 face="Arial">Cordialement,<br>
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<td><font size=3 face="Arial"><b>Antony<br>
MARTINEAU</b> </font><font size=2 color=#808080 face="Arial"><br>
Service informatique </font><font size=1 color=#808080 face="Arial"><br>
Technicien Informatique <br>
LIPPI Management </font>
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<td><font size=1 color=#5f5f5f face="sans-serif">De :</font>
<td><font size=1 face="sans-serif">Lise Didillon <ldidillon@prologue.fr></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">A:</font>
<td><font size=1 face="sans-serif">drbd-user@lists.linbit.com</font>
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<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">06/04/2009 18:38</font>
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<td><font size=1 color=#5f5f5f face="sans-serif">Objet :</font>
<td><font size=1 face="sans-serif">[DRBD-user] drbd (8.0.14, 8.0.16) very
slow with kernels 2.6.27 to 2.6.29 but ok with kernel 2.6.20</font>
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<td><font size=1 color=#5f5f5f face="sans-serif">Envoyé par :</font>
<td><font size=1 face="sans-serif">drbd-user-bounces@lists.linbit.com</font></table>
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<br><font size=3>Hello,<br>
with drbd-8.0.14 or 8.0.16 on the same machines:<br>
My tests are "copy big files on the replicated device". This
takes for a file 8 seconds. instead of 0.2 seconds without drbd if
kernel version is 2.6.27 or 28 or 29. <br>
but with kernel 2.6.20 there is no performance problem: it
takes sensibly the same time to copy this file if drbd is running or not.<br>
I alway use the same drbd.conf for these tests.<br>
have you some ideas about why drbd is so slow with kernels 2.6.27 to 2.6.29?<br>
regards,<br>
Lise Didillon<br>
</font>
<br><font size=3>-- </font>
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<td width=61%><font size=3 face="Verdana"><b>Lise DIDILLON</b></font><font size=3 color=#a2a2a2 face="Verdana"><br>
Ingénieur d'études, Ligne Produit UseIT</font>
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<div align=right><a href=mailto:lise.didillon@prologue.fr><font size=3 color=#a2a2a2 face="Verdana">lise.didillon@prologue.fr</font></a></div></table>
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