------=_Part_188393_848930197.1361962267490 Content-Type: text/plain; charset=GBK Content-Transfer-Encoding: 7bit thanks,i know a little more. but i do not understand fully. distrubute filesystem is more understandable. specially,,for SAN(iscsi,fc) it is hard to share luns between nodes(not reliable), even use LVM,CLVM. would you explain it ( SAN case)?and it is hard to connect 'local directory' with distrbuted repo. thanks. At 2013-02-27 17:55:45,"Gianluca Cecchi" <gianluca.cecchi@gmail.com> wrote:
On Wed, Feb 27, 2013 at 10:44 AM, bigclouds wrote:
there is a sentense 'Implements a distributed image repository over the supported storage types (local directory, FCP, FCoE, iSCSI, NFS, SAS) ' on http://www.ovirt.org/Architecture.
what is "distributed image repository"?
thanks.
Example I have a test environment where a Host is connected to several FCP LUNs. Each LUN becomes a storage domain for this host and the other hosts in the same cluster. So I have many VMs whose images resides on different storage domains (and so different LUNs). I can move a disk of a VM from a storage domain to another one. I think you can also have a mixed situation where a two disks' VM has one disk on a storage domain and the other one in another.
So I think it is to be explained this way the "distributed image repository".
And also "distributed" in the sense of different storage domain types, even if I think at this time one DC cannot have a mix of different storage domain types...
Gianluca
------=_Part_188393_848930197.1361962267490 Content-Type: text/html; charset=GBK Content-Transfer-Encoding: 7bit <div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><br>thanks,i know a little more. but i do not understand fully. distrubute filesystem is more understandable.<div style="font-family: Helvetica, 'Microsoft Yahei', verdana;">specially,,for SAN(iscsi,fc) it is hard to share luns between nodes(not reliable), even use LVM,CLVM.</div><div style="font-family: Helvetica, 'Microsoft Yahei', verdana;"><br></div><div style="font-family: Helvetica, 'Microsoft Yahei', verdana;">would you explain it ( SAN case)?and it is hard to connect '<span style="white-space: pre-wrap; line-height: 1.7;">local directory</span><span style="line-height: 1.7;">' with distrbuted repo.</span></div><div style="font-family: Helvetica, 'Microsoft Yahei', verdana;"><br><br>thanks.<br></div><div><br></div><br><br><br><div></div><div id="divNeteaseMailCard"></div><br><pre><br>At 2013-02-27 17:55:45,"Gianluca Cecchi" <gianluca.cecchi@gmail.com> wrote: >On Wed, Feb 27, 2013 at 10:44 AM, bigclouds wrote: >> there is a sentense 'Implements a distributed image repository over the >> supported storage types (local directory, FCP, FCoE, iSCSI, NFS, SAS) >> ' on http://www.ovirt.org/Architecture. >> >> what is "distributed image repository"? >> >> thanks. > >Example >I have a test environment where a Host is connected to several FCP LUNs. >Each LUN becomes a storage domain for this host and the other hosts in >the same cluster. >So I have many VMs whose images resides on different storage domains >(and so different LUNs). >I can move a disk of a VM from a storage domain to another one. >I think you can also have a mixed situation where a two disks' VM has >one disk on a storage domain and the other one in another. > >So I think it is to be explained this way the "distributed image repository". > >And also "distributed" in the sense of different storage domain types, >even if I think at this time one DC cannot have a mix of different >storage domain types... > >Gianluca </pre></div><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span> ------=_Part_188393_848930197.1361962267490--