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站点故障
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存储系统或站点故障的结果与丢失复制链路的结果几乎相同。正常运行的站点应在写入时发生大约15秒的IO暂停。15秒过后、IO将照常在该站点上恢复。
如果仅存储系统受到影响、则故障站点上的Oracle RAC节点将丢失存储服务、并在逐出和后续重新启动之前输入相同的200秒磁盘超时时间。
2024-09-11 13:44:38.613 [ONMD(3629)]CRS-1615: No I/O has completed after 50% of the maximum interval. If this persists, voting file /dev/mapper/grid2 will be considered not functional in 99750 milliseconds. 2024-09-11 13:44:51.202 [ORAAGENT(5437)]CRS-5011: Check of resource "NTAP" failed: details at "(:CLSN00007:)" in "/gridbase/diag/crs/jfs13/crs/trace/crsd_oraagent_oracle.trc" 2024-09-11 13:44:51.798 [ORAAGENT(75914)]CRS-8500: Oracle Clusterware ORAAGENT process is starting with operating system process ID 75914 2024-09-11 13:45:28.626 [ONMD(3629)]CRS-1614: No I/O has completed after 75% of the maximum interval. If this persists, voting file /dev/mapper/grid2 will be considered not functional in 49730 milliseconds. 2024-09-11 13:45:33.339 [ORAAGENT(76328)]CRS-8500: Oracle Clusterware ORAAGENT process is starting with operating system process ID 76328 2024-09-11 13:45:58.629 [ONMD(3629)]CRS-1613: No I/O has completed after 90% of the maximum interval. If this persists, voting file /dev/mapper/grid2 will be considered not functional in 19730 milliseconds. 2024-09-11 13:46:18.630 [ONMD(3629)]CRS-1604: CSSD voting file is offline: /dev/mapper/grid2; details at (:CSSNM00058:) in /gridbase/diag/crs/jfs13/crs/trace/onmd.trc. 2024-09-11 13:46:18.631 [ONMD(3629)]CRS-1606: The number of voting files available, 0, is less than the minimum number of voting files required, 1, resulting in CSSD termination to ensure data integrity; details at (:CSSNM00018:) in /gridbase/diag/crs/jfs13/crs/trace/onmd.trc 2024-09-11 13:46:18.638 [ONMD(3629)]CRS-1699: The CSS daemon is terminating due to a fatal error from thread: clssnmvDiskPingMonitorThread; Details at (:CSSSC00012:) in /gridbase/diag/crs/jfs13/crs/trace/onmd.trc 2024-09-11 13:46:18.651 [OCSSD(3631)]CRS-1652: Starting clean up of CRSD resources.
丢失存储服务的RAC节点上的SAN路径状态如下所示：
oradata7 (3600a0980383041334a3f55676c697347) dm-20 NETAPP,LUN C-Mode size=128G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 alua' wp=rw |-+- policy='service-time 0' prio=0 status=enabled | `- 34:0:0:18 sdam 66:96 failed faulty running `-+- policy='service-time 0' prio=0 status=enabled `- 33:0:0:18 sdaj 66:48 failed faulty running
Linux主机检测到路径丢失的速度比200秒快得多、但从数据库角度来看、在默认Oracle RAC设置下、与故障站点上主机的客户端连接仍会冻结200秒。只有在逐出完成后、才会恢复完整数据库操作。
同时、另一站点上的Oracle RAC节点将记录另一个RAC节点的丢失情况。否则，它将继续照常运作。
2024-09-11 13:46:34.152 [ONMD(3547)]CRS-1612: Network communication with node jfs13 (2) has been missing for 50% of the timeout interval. If this persists, removal of this node from cluster will occur in 14.020 seconds 2024-09-11 13:46:41.154 [ONMD(3547)]CRS-1611: Network communication with node jfs13 (2) has been missing for 75% of the timeout interval. If this persists, removal of this node from cluster will occur in 7.010 seconds 2024-09-11 13:46:46.155 [ONMD(3547)]CRS-1610: Network communication with node jfs13 (2) has been missing for 90% of the timeout interval. If this persists, removal of this node from cluster will occur in 2.010 seconds 2024-09-11 13:46:46.470 [OHASD(1705)]CRS-8011: reboot advisory message from host: jfs13, component: cssmonit, with time stamp: L-2024-09-11-13:46:46.404 2024-09-11 13:46:46.471 [OHASD(1705)]CRS-8013: reboot advisory message text: At this point node has lost voting file majority access and oracssdmonitor is rebooting the node due to unknown reason as it did not receive local hearbeats for 28180 ms amount of time 2024-09-11 13:46:48.173 [ONMD(3547)]CRS-1632: Node jfs13 is being removed from the cluster in cluster incarnation 621516934