<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000'><div><font face="times new roman, new york, times, serif">All I'll say is that some peoples VM guests have far greater I/O capability than other peoples physical machines...</font></div><div></div><div><br></div><div><br></div><hr id="zwchr" style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><blockquote style="color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12pt; border-left-width: 2px; border-left-style: solid; border-left-color: rgb(16, 16, 255); margin-left: 5px; padding-left: 5px; font-weight: normal; font-style: normal; text-decoration: none;"><b>From: </b>"James K. Prater" <jprater@draper.com><br><b>To: </b>"antoniofernandez@fabergroup.es" <antoniofernandez@fabergroup.es>, "drbd-user@lists.linbit.com" <drbd-user@lists.linbit.com><br><b>Sent: </b>Wednesday, February 18, 2015 11:49:11 AM<br><b>Subject: </b>Re: [DRBD-user] DRBD on virtual machine<br><br>
<font style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I continue to see people run DRDB clusters as VM guests. I personally don't get this. The only reason to do this is as a proof of concept and not for production. I run a DRDB cluster
as a source of data storage system for a virtualization environment. It is based on physical machines for maximum performance. Depending on the I/O requirements of the DRBD system and it's applications running underneath it could make it very difficult for
the virtualization hosts to supply the necessary I/O capability to support the required load.<br>
<br>
James </font><br>
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<font style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><b>From</b>: Antonio Fernández Pérez [mailto:antoniofernandez@fabergroup.es]
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<b>Sent</b>: Tuesday, February 17, 2015 08:55 AM<br>
<b>To</b>: drbd-user@lists.linbit.com <drbd-user@lists.linbit.com> <br>
<b>Subject</b>: [DRBD-user] DRBD on virtual machine <br>
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<div class="gmail_default" style="color:rgb(68,68,68);display:inline">Hi list:<br>
<br>
I need your help ... I have to migrate two physical servers with DRBD+Pacemaker+Corosync to virtual machines. On the new set of virtual machines I will can manage more hardware resources but, do you have any reason advise against using DRBD on virtual machines?<br>
<br>
I hope your answers.<br>
<br>
Thanks in advance.<br>
<br>
Regards,<br>
<br>
Antonio.</div>
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