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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I’m wondering why the current version of the “o2cb” tool does not support global heartbeat on DRBD devices.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Do I misunderstand the feature “global heartbeat” in that I should not use it on DRBD at all?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I patched the “o2cb” tool to recognize DRBD devices for starting a global heartbeat. Now the global heartbeat configuration with DRBD seems to work at cluster start, but I wonder whether it really is that easy – or I
am just missing something. Maybe it failed silently and I did not notice?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">BTW I edited file “o2cb_scandisk.c” function “add_to_list()” like this:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> if (!add)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> add = !strncmp(path->path, "/dev/rbd", 8);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> if (!add) // added<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> add = !strncmp(path->path, "/dev/drbd", 9); // added<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">and by observing the output of “/proc/drbd” I can tell that the stats for data read and data written on the DRBD device for the global heartbeat increases, while it stays the same on all other DRBD devices. (I have not
mounted any of these volumes)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">To me it looks like it works. Can anybody comment? Can I somehow “observe” the proper operation of the global heartbeat?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Daniel<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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