<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000'>Thanks, Digimer, and greetings again.<br><br>The configuration is:<br>Failover of primary to secondary.<br>Two nodes: one primary, one secondary in, as you say, a RAID 1 configuration.<br><br>So, all three get used? In our current configuration, we are only using DRBD and Heartbeat.<br><br><div><span name="x"></span><div><div><div><div><div><div><div><div><div><div style="color: rgb(0, 0, 0); font-weight: bold; "><span class="Apple-style-span"><br></span></div><div style="color: rgb(0, 0, 0); font-weight: bold; "><span class="Apple-style-span"><br></span></div><div><span class="Apple-style-span" style="font-weight: bold; "></span><span class="Apple-style-span" style="color: rgb(0, 0, 0); font-weight: bold; ">Bruce M. Wolfe, M.S.W., CIO<br> </span><span style="color: rgb(0, 0, 0); font-weight: bold; "><br></span><img src="http://alcoholjustice.org/images/stories/logo/aj-logo-for-web-byline-50pct.jpg"><br><div style="color: rgb(0, 0, 0); text-align: left; "> 24 Belvedere St.<br> San Rafael, CA 94901 <br><span class="gc-cs-link" title="Call with Google Voice">415/456.5692</span><span style="font-size: 12pt; "> </span><span style="font-size: 12pt; "> (Main Office)</span></div><div style="text-align: left; "><span class="gc-cs-link" title="Call with Google Voice" style="color: rgb(0, 0, 0); ">415/257.2493</span><span style="font-size: 12pt; "> </span><span style="font-size: 12pt; "> (Direct)</span></div><div style="text-align: left; "><span class="gc-cs-link" title="Call with Google Voice" style="color: rgb(0, 0, 0); ">415/456.0491</span> (Fax)<br> KI6BSL (HAM)</div></div></div></div></div></div></div></div></div></div></div><span name="x"></span><br><br>
"Injustice must be exposed, with all the tension its exposure creates, to the light of human conscience and the air of national opinion before it can be cured." - Martin Luther King Jr.</div><hr id="zwchr"><blockquote style="border-left:2px solid rgb(16, 16, 255);margin-left:5px;padding-left:5px;">On 08/15/2012 06:09 PM, Bruce Wolfe, M.S.W., CIO wrote:<br>> Just wondering where a good one is. Starting a new install with just two<br>> nodes.<br>> Corosync *or* DRBD, and Pacemaker<br>> <br>> Thanks in advance.<br><br>These are complementary, not opposing, technologies.<br><br>DRBD = block-level disk replication (think 'RAID 1 over a network')<br><br>Corosync = Cluster membership, ordered messaging, etc.<br><br>Pacemaker = Cluster resource management. That is, what runs where on the<br>cluster depending on the current membership.<br><br>So the short answer to you question is; All three.<br><br>The long answer depends entirely on what you are trying to do.<br><br>-- <br>Digimer<br>Papers and Projects: https://alteeve.com<br></blockquote><br></div></body></html>