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<DIV><SPAN lang=EN><SPAN class=882583921-02032012>W</SPAN>e have two
geographically separate data centers connected by 4 x Gigabit links (in 2
trunks). Our HA clusters are distributed between the data centers, with each
node of a 2-node cluster in a separate data center. (In the case of our 3-node
clusters, 2 nodes are in one data center and the 3rd node is in the other data
center.) Cluster membership information is communicated though both of the
Gigabit trunks, where each trunk is a separate Corosync ring. DRBD is replicated
through one of the trunks.</DIV>
<DIV>
<P></P>
<P>Question: If the links between the data centers are severed, split brain will
occur. What is the best way to provide quorum from a third location out on the
Internet?</P>
<P><SPAN class=882583921-02032012><FONT face=Calibri>Note: I posted this
question to the Linux HA list, too, because I was not sure which was better
suited.</FONT></SPAN></P>
<P></P>
<P>--</P>
<P>Eric Robinson</P>
<P><FONT face=Calibri></FONT> </P>
<P><FONT face=Calibri></FONT> </P>
<P> </P></SPAN></DIV><BR><BR><FONT color=silver><SPAN style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: Verdana"><FONT size=1>Disclaimer - March 2, 2012</FONT></FONT></SPAN></FONT> <P></P><FONT size=1><FONT face=Verdana color=gray><SPAN style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: Verdana">This email and any files <FONT size=1>transmitted</FONT> with it are confidential and intended solely for <STRONG>drbd-user@lists.linbit.com</STRONG></SPAN></FONT><FONT face=Verdana color=gray><SPAN style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: Verdana">. If you are not the named addressee you should not disseminate, distribute, copy or alter this email. Any views or opinions presented in this email are solely those of the author and might not represent those of Physicians' Managed Care or Physician Select Management. Warning: Although Physicians' Managed Care or Physician Select Management has taken reasonable precautions to ensure no viruses are present in this email, the company cannot accept responsibility for any loss or damage arising from the use of this email or attachments.</SPAN></FONT></FONT></BODY></HTML>