Manage Storage hosts¶
Starting from Nebula Graph 3.0.0, setting Storage hosts in the configuration files only registers the hosts on the Meta side, but does not add them into the cluster. You must run the
ADD HOSTS statement to add the Storage hosts.
Nebula Graph Cloud clusters add Storage hosts automatically. Cloud users do not need to manually run
Add Storage hosts¶
Add the Storage hosts to a Nebula Graph cluster.
ADD HOSTS <ip>:<port> [,<ip>:<port> ...]; ADD HOSTS "<hostname>":<port> [,"<hostname>":<port> ...];
- To make sure the follow-up operations work as expected, wait for two heartbeat cycles, i.e., 20 seconds, and then run
SHOW HOSTSto check whether the host is online.
- Make sure that the IP address and port number are the same as those in the configuration file. For example, the default IP address and port number in standalone deployment are
- When using a domain name, enclose it in quotation marks, for example,
ADD HOSTS "foo-bar":9779.
- Ensure that the storage host to be added is not used by any other cluster, otherwise, the storage adding operation will fail.
Drop Storage hosts¶
Delete the Storage hosts from cluster.
You can not delete an in-use Storage host directly. Delete the associated graph space before deleting the Storage host.
DROP HOSTS <ip>:<port> [,<ip>:<port> ...]; DROP HOSTS "<hostname>":<port> [,"<hostname>":<port> ...];