Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hello, Consider the following hardware configuration: Node A connects to Node B by a switched network and Node A connects to Node B by a crossover cable. Consider the following software configuration: DRBD communicates over the switched network and Heartbeat (HA) communicates over both networks. Now, following these steps I can repeat the case where I have both nodes in a standalone state which requires user intervention to reconnect the current PRIMARY DRBD node. 1.) Node A is DRBD Primary and Node B is DRBD Secondary 2.) I pull the switched network cable from node A 3.) Node A detects the failure and HA moves the resources to node B 4.) Node B is now StandAlone->Primary/Unknown and node A is StandAlone->Secondary/Unknown 5.) I reboot node A simulating a NIC replacement and reconnect the switched network cable 6.) Node B aborts the node A DRBD connection complaining that current Primary would be sync TARGET! 7.) Node A waits on a degraded connection timeout forcing the need to run `drbdadm connect all` on node B I have read through previous posts and have seen this issue mentioned a couple of times with responses suggesting to ensure the DRBD net::timeout value is lower than the HA deadtime and other suggestions to configure DRBD over the crossover cable. The timeout change did not make any difference. Utilizing the crossover cable adds complications, such as if one of the NICs break utilizing the crossover cable, assuming the cable doesn't go bad, there is data loss deciding which node has a bad NIC. The best base would be for the secondary node to have the bad NIC as it could sync up later. If it is the primary node, HA would have to move resource to the secondary node ignoring the fact that there is data on the primary node that did not get copied to the other node. So my question, is this the expected behavior of DRBD? I appreciate your help with this matter and look forward to your reply. Regards, Shane M. Walton __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/