本节介绍了一种切换故障情形。在此情形中,cluster-paris 是原来的主群集,而 cluster-newyork 是原来的辅助群集。
经过切换,使服务从 cluster-paris 切换到了 cluster-newyork,如下所示:
phys-newyork-1# geopg switchover -f -m cluster-newyork tcpg |
处理 geopg switchover 命令时,horctakeover 命令执行 SVOL-SSUS-takeover,并向 Hitachi TrueCopy 设备组 devgroup1 返回 5。作为结果,geopg switchover 命令将返回以下故障消息:
Processing operation.... this may take a while .... "Switchover" failed for the following reason: Switchover failed for Truecopy DG devgroup1 |
显示此故障消息后,这两个群集将处于以下状态:
cluster-paris: tcpg role: Secondary cluster-newyork: tcpg role: Secondary phys-newyork-1# pairdisplay -g devgroup1 -fc Group PairVol(L/R) (Port#,TID,LU),Seq#,LDEV#.P/S, Status,Fence,%, P-LDEV# M devgroup1 pair1(L) (CL1-C , 0, 20)12345 609..S-VOL SSWS ASYNC,100 1 - devgroup1 pair1(R) (CL1-A , 0, 1) 54321 1..P-VOL PSUS ASYNC,100 609 - |