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For this rainy weekend, please consider the following:<br>
<br>
I'm constructing a new server and want 2 KVM guest systems on it.
There are 3 4TB drives on it. At the moment, assume one 4TB drive
will be reserved for the KVM host. The server has 16GB of RAM.<br>
<br>
What are the advantages/disadvantages of:<br>
<ol>
<li>Putting all disks in a ZFS pool on the host and dividing the
pool between each guest. Or:</li>
<li>Giving each guest its own disk. (At least one of the guests
will be running ZFS).</li>
</ol>
<p>The guests will be:<br>
</p>
<p> * Both guests will be running DNS servers<br>
* One guest will be running a Postfix/Dovecot mail server
(including mailman)<br>
* The other guest will be running a LAMP stack.<br>
</p>
<p>Hints: <br>
* I don't particularly like option 2 as I'll lose the benefits
of ZFS (snapshot backups, striping, ...)<br>
* I don't know if the performance benefits of ZFS will outweigh
the overhead of KVM/libvirt.<br>
</p>
<p>--Bruce<br>
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