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SnapMirror 通訊失敗
貢獻者
建議變更
PDF
如果 SnapMirror 主動式同步複寫連結、則無法完成寫入 IO 、因為叢集無法將變更複寫到另一個站台。
站台A
複寫連結失敗的站台 A 在寫入 IO 處理中會暫停約 15 秒、因為 ONTAP 會在判斷複寫連結確實無法運作之前、嘗試複寫寫入內容。經過 15 秒後、站台 A 上的 ONTAP 叢集會恢復讀寫 IO 處理。SAN 路徑不會變更、 LUN 也會保持連線。
站台B
由於站台 B 不是 SnapMirror 作用中同步偏好的站台、因此其 LUN 路徑將在大約 15 秒後變成無法使用。
複寫連結的時間是 15 ： 19 ： 44 。Oracle RAC 的第一個警告會在 200 秒逾時（由 Oracle RAC 參數 disktimeout 控制）接近 100 秒後到達。
2024-09-10 15:21:24.702 [ONMD(2792)]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 99340 milliseconds. 2024-09-10 15:22:14.706 [ONMD(2792)]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 49330 milliseconds. 2024-09-10 15:22:44.708 [ONMD(2792)]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 19330 milliseconds. 2024-09-10 15:23:04.710 [ONMD(2792)]CRS-1604: CSSD voting file is offline: /dev/mapper/grid2; details at (:CSSNM00058:) in /gridbase/diag/crs/jfs13/crs/trace/onmd.trc. 2024-09-10 15:23:04.710 [ONMD(2792)]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 2024-09-10 15:23:04.716 [ONMD(2792)]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 2024-09-10 15:23:04.731 [OCSSD(2794)]CRS-1652: Starting clean up of CRSD resources.
達到 200 秒投票磁碟逾時後、此 Oracle RAC 節點將自行從叢集移除並重新開機。