启动/停止OushuDB

启动OushuDB有两种方式,一种是通过”hawq start cluster”命令来启动整个集群,包括master和segment。启动哪些segment是由”/hawq-install-path/etc/slaves”中包含的节点确定的。

source /usr/local/hawq/greenplum_path.sh # 设置OushuDB环境变量
hawq start cluster # 启动整个OushuDB集群

另外一种方式是分别启动OushuDB master和segment。因为OushuDB master和segment是解耦合的,分别启动master和segment是可行的。

hawq start master # 启动master,指的是启动本地master
hawq start segment # 启动segment,指的是启动本地segment

重新启动或者停止OushuDB也有两种方式:

# 方式一
hawq restart cluster # 重启OushuDB集群
hawq stop cluster # 停止OushuDB集群

# 方式二
hawq restart master # 重启本机的OushuDB master
hawq restart segment # 重启本机的OushuDB segment

hawq stop master # 停止本机OushuDB master
hawq stop segment # 停止本机OushuDB segment

启动/停止Magma

OushuDB4.0 实现了单独起停Magma服务,具体命令如下:

# 方式一 OushuDB4.0 集群起停带Magma服务 [只有hawq init|start|stop cluster命令可以带--with_magma选项]
hawq init cluster --with_magma # 启动OushuDB集群时,使用--with_magma选项,同时启动Magma服务, 3.X版本不支持。

# 方式二 Magma服务单独起停
magma start|stop|restart cluster
magma start|stop|restart node

关于OushuDB hawq命令的详细用法,可以通过”hawq –help”命令得到。

 changlei:build ChangLei$ hawq --help

 usage: hawq <command> [<object>] [options]
         [--version]

The most commonly used hawq "commands" are:
start         Start hawq service.
stop          Stop hawq service.
init          Init hawq service.
restart       Restart hawq service.
activate      Activate hawq standby master as master.
version       Show hawq version information.
config        Set hawq GUC values.
state         Show hawq cluster status.
filespace     Create hawq filespaces.
extract       Extract table metadata into a YAML formatted file.
load          Load data into hawq.
scp           Copies files between multiple hosts at once.
ssh           Provides ssh access to multiple hosts at once.
ssh-exkeys    Exchanges SSH public keys between hosts.
check         Verifies and validates HAWQ settings.
checkperf     Verifies the baseline hardware performance of hosts.
register      Register parquet files generated by other system into the corrsponding table in HAWQ

See 'hawq <command> help' for more information on a specific command.