<div dir="ltr"><div>Hi Itamar,</div><div><br></div>Local storage, my plan is use the local disks in each hypervisor (4 or 6 depending on generation, no HW raid ) to get cheap, none-centralized high IO storage for my VMs.<div>
For example : </div><div>A Cassandra/Hadoop VM would get 6 disks and would use RAID0 to maximize IO performance and rely on Cassandra architecture for redundancy.</div><div>A MySQL VM running on the same hypervisor would use RAID10 on its 6 disks to balance IO performance and redundancy.</div>
<div>A third VM running our in house web scraping software would only use two disks (RAID1) but consume most of the hypervisor CPU and RAM.</div><div><br></div><div>This is more or less how we run stuff currently, using XEN community, but after passing the 100 hypervisors mark some sort of centralized management is becoming necessary.</div>
<div><br></div><div>If this is not possible using the web UI it might be possible by editing the templates that generate the libvirt VM XML.</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div>
<div><br></div><div><br></div><div><br></div><div><br></div><div><br><div class="gmail_quote">On Fri, Jun 1, 2012 at 5:34 PM, Itamar Heim <span dir="ltr"><<a href="mailto:iheim@redhat.com" target="_blank">iheim@redhat.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">On 05/31/2012 05:12 PM, Oded Ben Ozer wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi folks,<br>
<br>
I'm trying to evaluate ovrit as a possible virtualization solution for<br>
my datacenter .<br>
I need some of my VMs to have access to multiple disks installed in the<br>
host so that the RAID will be configured in the guest level, this way<br>
I can optimize redundancy and /IO performance per guest. (raid0 vs<br>
raid10 vs raid 5) - this would be similar to what EC2/Openstack<br>
call ephemeral storage.<br>
Is this possible in oVirt ?<br>
A less desirable solution would be to create different RAID arrays in<br>
the host and place VM images on different arrays, is that possible ?<br>
( according to the pdf guide this is possible in RHEL but not in oVirt<br>
node ?!? )<br>
</blockquote>
<br></div></div>
can you please elaborate a bit more on your use case?<br>
specifcially, are you planning on using shared storage (fc/iscsi/nfs/gluster/etc.) or local storage of each hypervisor?<br>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">Oded Ben Ozer<br>IT Operations Architect<br>Pageonce inc<br>+972544668357<br></div><br>
</div></div>