用法 在标准服务器上运行这个函数来定义其作为 SD 辅助服务器的主服务器。 使用 ha sds set 参数来定义不活动的标准服务器作为主服务器，如果 SD 辅助服务器连 接到它。 使用 ha sds set force 参数来定义不活动的标准服务器作为主服务器， 无论是否有任何 SD 辅助服务器连接到它。如果会话是活动的，则调用成功，但共享磁盘子系统可被损坏。 这个函数等同于 onmode -d set SDS primary 命令。 示例 下列示例将名为 ids_stores 的标准服务器转换到主服务器： EXECUTE FUNCTION task("ha sds set","ids_stores");
Multi-Tenancy Capability GBase 8a MPP Cluster provides multi-tenant capabilities through virtual cluster technology to achieve physical or logical isolation between tenants. The computing nodes are grouped into multiple virtual subsets within a virtual cluster, with each subset physically isolated on resources and logically separated in the namespace. The virtual cluster provides a unified access entry, metadata view, execution scheduling, authentication, and permission management for all subsets. On each computing node of a virtual subset, different application and user resource quotas and query priorities can be flexibly configured through resource management and resource groups. With a sound permission authorization and management mechanism, different applications can run in different virtual subsets, and different types of tasks of the same application can run in the same subset, but with different resource quotas and priorities, and necessary isolation is ensured. It's like running in a transparent "sandbox."
GBase 8a MPP Cluster Technical White Paper General Data Technology Co., Ltd. - 19 -