<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000'>Hi Theron,<br><br>Thanks, that's what I thought. So with dedup we save space in the storage and what about performance, will it increase performance? once it will not use the same instance twice, is that right? i.e., if I have 2 VM's (let's say, Fedora 18), with the same kernel, does oVirt run 2 times the 2 instances or can it manage that so it will not have to run the same software twice, in order to save resources and performance.<br><br>I'm not sure if my English is enough for you to realize what I'm trying to explain.<br><br>Regards<br>Jose<br><br><hr id="zwchr"><div style="color: rgb(0, 0, 0); font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From: </b>"Theron Conrey" <tconrey@redhat.com><br><b>To: </b>suporte@logicworks.pt<br><b>Cc: </b>Users@ovirt.org<br><b>Sent: </b>Sábado, 25 de Maio de 2013 21:00:39<br><b>Subject: </b>Re: [Users] deduplication<br><br>Hi Jose,<br><br>Deduplication or dedup for short is usually a function of the storage appliance, and as such is a "post-allocation" operation. As a quick example the hypervisor will request the space, allocate all of it, and if space can be reclaimed via a storage side operation like dedup, that's where it's handled. <br><br>If you're leveraging oVirt with storage appliance that supports dedup it will work just fine with oVirt as well. <br><br>We DO however support thin provisioning. This is a "pre-allocation" operation handled by oVirt. Instead of just waiting on the storage to reclaim space via a dedup job (if this isn't done inline dedup can be taxing on the storage array and is usually a scheduled job that isn't constant) thin provisioning only allocates the storage space that is actually required. <br><br>More information can be found on our wiki here: http://www.ovirt.org/Vdsm_Disk_Images<br><br><br>Theron Conrey<br>Open Source and Standards, Red Hat<br>@theronconrey<br><br><br><br>----- Original Message -----<br>From: suporte@logicworks.pt<br>To: Users@ovirt.org<br>Sent: Saturday, May 25, 2013 9:02:40 AM<br>Subject: [Users] deduplication<br><br>is deduplication possible? <br><br>Regards <br>Jose <br><br>-- <br><br>Jose Ferradeira <br>http://www.logicworks.pt <br><br><br>_______________________________________________<br>Users mailing list<br>Users@ovirt.org<br>http://lists.ovirt.org/mailman/listinfo/users<br></div><br></div></body></html>