Home >Database >Mysql Tutorial > 没有共享存储和仲裁盘的SQL Server 2012HADR故障手动切换TSQL

没有共享存储和仲裁盘的SQL Server 2012HADR故障手动切换TSQL

WBOY
WBOYOriginal
2016-06-07 17:44:21977browse

---恢复内容开始--- 没有共享存储和仲裁盘的SQL Server 2012HADR故障手动切换TSQL 因为一些原因有些SQLSERVER集群中没有配置仲裁盘,只有一主一辅两个实例。 配置如下: USE [master] GO CREATE AVAILABILITY GROUP [ak51DB] WITH (AUTOMATED_BACKUP_PREFERE

---恢复内容开始---

没有共享存储和仲裁盘的SQL Server 2012HADR故障手动切换TSQL

因为一些原因有些SQLSERVER集群中没有配置仲裁盘,美国空间,只有一主一辅两个实例。

配置如下:

USE [master] GO CREATE AVAILABILITY GROUP [ak51DB] WITH (AUTOMATED_BACKUP_PREFERENCE = SECONDARY) FOR DATABASE [ak51Activity],[ak51Load] REPLICA ON N'ak51-DB35' WITH (ENDPOINT_URL = N'TCP://ak51-DB35.580top.com:5022', FAILOVER_MODE = MANUAL, AVAILABILITY_MODE = ASYNCHRONOUS_COMMIT, SESSION_TIMEOUT = 10, BACKUP_PRIORITY = 100, PRIMARY_ROLE(ALLOW_CONNECTIONS = ALL), SECONDARY_ROLE(ALLOW_CONNECTIONS = ALL)), N'ak51-DB36' WITH (ENDPOINT_URL = N'TCP://ak51-DB36.580top.com:5022', FAILOVER_MODE = MANUAL, AVAILABILITY_MODE = SYNCHRONOUS_COMMIT, SESSION_TIMEOUT = 10, BACKUP_PRIORITY = 50, PRIMARY_ROLE(ALLOW_CONNECTIONS = ALL), SECONDARY_ROLE(ALLOW_CONNECTIONS = NO)); GO

这时候是不具备SQL Server 2012 Always on的自动故障转移条件的 但是它万一出现主机故障时,需要手动强起辅机的 脚本很简单:

ALTER AVAILABILITY GROUP [ak51db] FORCE_FAILOVER_ALLOW_DATA_LOSS;

需要注意的是:如果是异步提交,强起辅机可能会有数据丢失

 

当主机重新连线时,美国空间,再切回来后,会发现高可用性组处于“未同步"状态

这时候需要运行TSQL重新恢复可用性组:

ALTER DATABASE [ak51Load] SET HADR RESUME; ALTER DATABASE [ak51Activity] SET HADR RESUME;

至于我为什么不选用高可用性侦听组和仲裁盘的原因,这里很复杂。。。

原文:

---恢复内容结束---

---恢复内容开始---

没有共享存储和仲裁盘的SQL Server 2012HADR故障手动切换TSQL

因为一些原因有些SQLSERVER集群中没有配置仲裁盘,只有一主一辅两个实例。

配置如下:

USE [master] GO CREATE AVAILABILITY GROUP [ak51DB] WITH (AUTOMATED_BACKUP_PREFERENCE = SECONDARY) FOR DATABASE [ak51Activity],[ak51Load] REPLICA ON N'ak51-DB35' WITH (ENDPOINT_URL = N'TCP://ak51-DB35.580top.com:5022', FAILOVER_MODE = MANUAL, AVAILABILITY_MODE = ASYNCHRONOUS_COMMIT, SESSION_TIMEOUT = 10, BACKUP_PRIORITY = 100, PRIMARY_ROLE(ALLOW_CONNECTIONS = ALL), SECONDARY_ROLE(ALLOW_CONNECTIONS = ALL)), N'ak51-DB36' WITH (ENDPOINT_URL = N'TCP://ak51-DB36.580top.com:5022', FAILOVER_MODE = MANUAL, AVAILABILITY_MODE = SYNCHRONOUS_COMMIT, SESSION_TIMEOUT = 10, BACKUP_PRIORITY = 50, PRIMARY_ROLE(ALLOW_CONNECTIONS = ALL), SECONDARY_ROLE(ALLOW_CONNECTIONS = NO)); GO

这时候是不具备SQL Server 2012 Always on的自动故障转移条件的 但是它万一出现主机故障时,需要手动强起辅机的 脚本很简单:

ALTER AVAILABILITY GROUP [ak51db] FORCE_FAILOVER_ALLOW_DATA_LOSS;

需要注意的是:如果是异步提交,强起辅机可能会有数据丢失

 

当主机重新连线时,再切回来后,会发现高可用性组处于“未同步"状态

这时候需要运行TSQL重新恢复可用性组:

ALTER DATABASE [ak51Load] SET HADR RESUME; ALTER DATABASE [ak51Activity] SET HADR RESUME;

至于我为什么不选用高可用性侦听组和仲裁盘的原因,网站空间,这里很复杂。。。

原文:

---恢复内容结束---

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn