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Stefan,<br>
<br>
If the master fails, then the slave is promoted master and takes the
service over. At this time, it's the only node alive. When the
former master returns to life, its data will be outdated compared to
the current master. When it joins again the cluster, DRBD will
detect that inconsistency and sync its data (former master datas)
against the official master one (current master). DRBD embeds a
bitmap scheme to identify the outdated datas, it knows precisely
what is up to date and what is not. There are a couple of pages
discussing that by the end of the DRBD Users Guide.<br>
<br>
Best regards,<br>
<br>
Pascal.<br>
<br>
Le 24/04/2012 08:17, "Stefan Günther" a écrit :
<blockquote
cite="mid:trinity-f941e13b-bf41-4423-ab40-b67dc53ecebf-1335248277527@3capp-webde-bs17.dlan.cinetic.de"
type="cite">
<div style="font-family: Verdana;font-size: 12.0px;">
<div style="font-family: Verdana;font-size: 12.0px;">
<div>Hello,<br>
</div>
<div><br>
</div>
<div>on the DRBD homepage I found the following sentence:<br>
</div>
<div><br>
</div>
<div>"After an outage of a node DRBD automatically
resynchronizes the temporarily unavailable node to the
latest version of the data, in the background, without
interfering with the service running."<br>
</div>
<div><br>
</div>
<div>In a HA scenario where the master server has gone down,
DRBD takes care of syncing the data from slave to master.<br>
</div>
<div>But how does the HA software know, when syncing has
finished, so that the master server can take his role again?<br>
</div>
<div>I know this is not a DRBD question, but I guess that
somehow DRBD has to tell the HA software, that everything is
okay again. Silly question?<br>
</div>
<div><br>
</div>
<div>Thanks for any hints/advice,<br>
</div>
<div><br>
</div>
<div>Stefan<br>
</div>
</div>
<div><br>
</div>
</div>
<br>
<br>
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