Hi, I have doubt about diference between use the image for storage virtual machine vs storage in blocks using lvm , what difference ? What have better performance? -- Sent from my mobile device Bruno Steven - Administrador de sistemas. LPIC-1 - LPI ID: lpi000119659 / Code: p2e4wz47e4 https://www.lpi.org/caf/Xamman/certification MCP-Windows 2003 - TranscriptID: 793804 / Access Code: 080089100 https://mcp.microsoft.com/authenticate/validatemcp.aspx P Antes de imprimir pense em sua responsabilidade e comprometimento com o Meio Ambiente. Before printing this message, think about your ecologic responsability and environment commitment. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Thursday 08 July 2010 15:09:39 Bruno Steven wrote:> Hi, > > I have doubt about diference between use the image for storage virtual > machine vs storage in blocks using lvm , what difference ? What have > better performance? >block devices are faster. I personally don''t see the added value of image files: with "dd" you can create them anytime you wish. B. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Thu, Jul 8, 2010 at 6:55 AM, Bart Coninckx <bart.coninckx@telenet.be>wrote:> On Thursday 08 July 2010 15:09:39 Bruno Steven wrote: > > Hi, > > > > I have doubt about diference between use the image for storage virtual > > machine vs storage in blocks using lvm , what difference ? What have > > better performance? > > > > > block devices are faster. I personally don''t see the added value of image > files: with "dd" you can create them anytime you wish. > > B. >LVM is faster for some things and other times they are about the same. During my tests LVM at the very most outperformed disk images by 10%. I was quite surprised that the difference wasn''t more. In most tests though it''s very near the same speed. However I run all database VMs on LVM because Imysqlbench clocks the DomU at about 99% of the speed of Dom0 if the DomU is on LVM. On a disk image it reads about 95%. This for my databases is worth the effort. Grant McWilliams Some people, when confronted with a problem, think "I know, I''ll use Windows." Now they have two problems. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
There is also a lot higher risk of data corruption with a large image as well. -Mark _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users