Oracle RAC心跳机制

最新推荐文章于 2025-03-12 08:58:30 发布

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最新推荐文章于 2025-03-12 08:58:30 发布 · 3.9k 阅读

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1、网络心跳(Network HeartBeat,NHB)

首先是确定集群节点之间的连通性，以便节点之间能够了解彼此的状态，而对于Oracle集群，这是通过节点间的网络心跳来实现的。对于Oracle集群，ocssd.bin守护进程每秒钟向集群的其他节点发送网络心跳（当然是通过集群的私网）。

[root@lissen-node2 trace]# ps -ef | grep ocssd.bin | grep -v grep
grid      5081     1  1 19:43 ?        00:01:07 /u19/app/19.2.0.0.0/grid/bin/ocssd.bin

[root@lissen-node2 trace]# grep NHB ocssd.trc
2019-11-28 22:37:37.228 :    CSSD:1378293504: [     INFO] clssnmCheckSplit: Node 1, lissen-node1, dead, last DHB (1574951827, 800434) after NHB (1574951827, 800284), but within reboot time 3000
2019-11-28 22:37:37.229 :    CSSD:1378293504: [     INFO] clssnmCheckKillStatus: Node 1, lissen-node1, down, due to timeout of DHB; last NHB TOD invariant clock 800284, TOD invariant clock 800434
2019-11-28 22:37:37.366 :    CSSD:1378293504: [     INFO] clssnmCheckKillStatus: Node 1, lissen-node1, down, due to timeout of DHB; last NHB TOD invariant clock 800284, TOD invariant clock 800434
2019-11-28 22:37:37.467 :    CSSD:1378293504: [     INFO] clssnmCheckKillStatus: Node 1, lissen-node1, down, due to timeout of DHB;