gcrecover是GBase 8a集群内置的，用于恢复集群event的服务，部署在每个管理（gcluster）节点上。通过gcadmin recover命令，实现暂停，恢复同步工作，设置或取消某个VC优先恢复等功能。
目录导航
命令参数
执行gcadmin --help, 如果能看到有recover部分，则证明该版本支持此功能。输出样例如下：
27. gcadmin recover <[pause | continue | cancel highpriority | show < status | highpriority >] |
[highpriority vc_name [event_type]]> : event_type: {ddlevent | dmlevent | dmlstorage}
支持的功能包括
pause
暂停gcrecover服务。正在恢复中的会继续，但不会有新的恢复任务启动。
continue
恢复gcrecover服务。如果处于pause状态，则恢复成正常，否则被忽略。
highpriority vc_name [event_type]
设置某个VC优先恢复，可选参数可设置三种event类型，包括ddlevent 、dmlevent |dmlstorage。
show status
当前gcrecover服务状态。continue为正常服务状态(默认)，pause为暂停状态。
show highpriority
显示当前优先恢复的vc以及类型(如果设置了，否则为全部类型)。
如果没有优先的，则返回None。
样例
暂停和恢复
可以多次暂停或恢复，不会报错。
[gbase@vm151 config]$ gcadmin recover pause
gcadmin recover pause success
[gbase@vm151 config]$ gcadmin recover pause
gcadmin recover pause success
[gbase@vm151 config]$ gcadmin recover show status
pause
[gbase@vm151 config]$ gcadmin recover continue
gcadmin recover continue success
[gbase@vm151 config]$ gcadmin recover continue
gcadmin recover continue success
[gbase@vm151 config]$ gcadmin recover show status
continue
[gbase@vm151 config]$
设置和取消高优先级
可重复设置或取消，不会报错。
[gbase@vm151 config]$ gcadmin recover highpriority vc_a ddlevent
gcadmin recover highpriority vc_a ddlevent success
[gbase@vm151 config]$ gcadmin recover show highpriority
gcadmin recover highpriority vc_a ddlevent
[gbase@vm151 config]$ gcadmin recover cancel highpriority
gcadmin recover cancel highpriority success
[gbase@vm151 config]$ gcadmin recover cancel highpriority
gcadmin recover cancel highpriority success
[gbase@vm151 config]$ gcadmin recover show highpriority
none
[gbase@vm151 config]$
gc_recover.log日志
从日志中，可以看到pause和continue和优先级信息。
2026-02-11 16:05:57.934 [INFO ] <RECOVER-INFO>: refresh gcrecover status is pause
2026-02-11 16:05:59.489 [INFO ] <RECOVER-INFO>: refresh gcrecover status is pause
2026-02-11 16:06:50.154 [INFO ] <RECOVER-INFO>: refresh gcrecover status is continue
2026-02-11 16:06:52.180 [INFO ] <RECOVER-INFO>: refresh gcrecover status is continue
2026-02-11 16:08:21.377 [INFO ] <RECOVER-INFO>: get gcrecover high pri rule is vc_a&ddlevent
2026-02-11 16:08:21.378 [INFO ] <RECOVER-INFO>: get gcrecover event rule vcname-vc_a eventype-ddlevent
2026-02-11 16:08:21.378 [INFO ] <RECOVER-INFO>: recover change version 6
2026-02-11 16:08:48.273 [INFO ] <RECOVER-INFO>: get gcrecover high pri rule is none
2026-02-11 16:08:48.273 [INFO ] <RECOVER-INFO>: reset recover config none
2026-02-11 16:08:48.273 [INFO ] <RECOVER-INFO>: recover change version 7
2026-02-11 16:08:55.988 [INFO ] <RECOVER-INFO>: get gcrecover high pri rule is none
2026-02-11 16:08:55.988 [INFO ] <RECOVER-INFO>: reset recover config none
2026-02-11 16:08:55.988 [INFO ] <RECOVER-INFO>: recover change version 8
当暂停时，即使有新的event,gcrecover也不会工作，直到continue状态。
重启gcrecover服务，不会影响状态。该标志应记录在gcware中。
如下是重启gcrecover后，立即发现当前状态为pause。
2026-02-11 11:21:33.879 [INFO ] <RECOVER-INFO>: Recover Thread(0x7fd1b67ee700) is been built success
2026-02-11 11:21:33.879 [INFO ] <RECOVER-INFO>: Recover Thread(0x7fd1b5fed700) is been built success
2026-02-11 11:21:33.879 [INFO ] <RECOVER-INFO>: Recover Thread(0x7fd1b57ec700) is been built success
2026-02-11 11:21:33.879 [INFO ] <RECOVER-INFO>: Recover Thread(0x7fd1b4feb700) is been built success
2026-02-11 11:21:33.880 [INFO ] <RECOVER-INFO>: Recover Thread(0x7fd1b47ea700) is been built success
2026-02-11 11:22:08.783 [INFO ] <RECOVER-INFO>: refresh gcrecover status is pause
2026-02-11 11:22:17.851 [INFO ] <RECOVER-INFO>: refresh gcrecover status is continue
2026-02-11 11:22:47.391 [INFO ] <RECOVER-INFO>: get gcrecover high pri rule is none
2026-02-11 11:22:47.392 [INFO ] <RECOVER-INFO>: reset recover config none
2026-02-11 11:22:47.392 [INFO ] <RECOVER-INFO>: recover change version 2
总结
该功能主要用于在多vc情况下，设置某个vc的event优先恢复。
暂停和继续是附属功能，特殊情况才会使用。比如同步占用资源很多影响业务，可能会在业务繁忙期，暂停恢复，等业务空闲期再继续。