<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">This was implemented recently.<div><br></div><div><a href="https://blueprints.launchpad.net/nova/+spec/nova-image-cache-management">https://blueprints.launchpad.net/nova/+spec/nova-image-cache-management</a></div><div><br></div><div>Vish</div><div><br><div><div>On Feb 28, 2012, at 9:17 AM, Salman A Baset wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div><p><font size="2" face="sans-serif">Hello folks,</font><br>
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<font size="2" face="sans-serif">I was wondering if there is any plan to incorporate cleanup of unused images that reside on /var/lib/nova/instances/_base</font><font size="2" face="sans-serif"> </font><font size="2" face="sans-serif">directory of a compute node in Essex release and beyond. </font><br>
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<font size="2" face="sans-serif">What are the best practices of sizing storage requirement for /var/lib/nova/instances/_base . For instance, if a user can create image snapshots and then boot instances from that images, those snapshots can quickly fill the disk space. How are folks managing sizing of _base in practice? </font><br>
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<font size="2" face="sans-serif">What about mounting _base directory over say NFS? Mounting _base over NFS can decrease the provisioning time for a new image since the whole image does not have to be copied first. This is especially useful for images that are snapshots. However, it can impact runtime performance.</font><br>
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<font size="2" face="sans-serif">I have seen examples such as those in the link below, which use qemu to find which images are in use.</font><br>
<font size="2" face="sans-serif"><a href="http://www.stillhq.com/openstack/000001.html">http://www.stillhq.com/openstack/000001.html</a></font><br>
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<font size="2" face="sans-serif">Thanks.</font><br>
<br>
<font size="2" face="sans-serif">Best Regards,<br>
<br>
Salman A. Baset<br>
Research Staff Member, IBM T. J. Watson Research Center<br>
Tel: +1-914-784-6248<br>
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