# Use BR to back up data¶

After the BR is compiled, you can back up data of the entire graph space. This topic introduces how to use the BR to back up data.

## Prerequisites¶

To back up data with the BR, do a check of these:

• The Nebula Graph services are running.
• The nebula-agent has been downloaded and the nebula-agent service is running on each host in the cluster.
• If you store the backup files locally, create a directory with the same absolute path on the meta servers, the storage servers, and the BR machine for the backup files and get the absolute path. Make sure the account has write privileges for this directory.

Note

In the production environment, we recommend that you mount Network File System (NFS) storage to the meta servers, the storage servers, and the BR machine for local backup, or use Amazon S3 or Alibaba Cloud OSS for remote backup. When you restore the data from local files, you must manually move these backup files to a specified directory, which causes redundant data and troubles. For more information, see Restore data from backup files.

## Procedure¶

Run the following command to perform a full backup for the entire cluster.

Note

Make sure that the local path where the backup file is stored exists.

$./bin/br backup full --meta <ip_address> --storage <storage_path>  For example: • Run the following command to perform a full backup for the entire cluster whose meta service address is 127.0.0.1:9559, and save the backup file to /home/nebula/backup/. Caution If there are multiple metad addresses, you can use any one of them. $ ./bin/br backup full --meta "127.0.0.1:9559" --storage "local:///home/nebula/backup/"

• Run the following command to perform a full backup for the entire cluster whose meta service address is 127.0.0.1:9559, and save the backup file to backup in the br-test bucket of the object storage service compatible with S3 protocol.

\$ ./bin/br backup full --meta "127.0.0.1:9559" --s3.endpoint "http://127.0.0.1:9000" --storage="s3://br-test/backup/" --s3.access_key=minioadmin --s3.secret_key=minioadmin --s3.region=default


The parameters are as follows.

Parameter Data type Required Default value Description
-h,-help - No None Checks help for restoration.
-debug - No None Checks for more log information.
-log string No "br.log" Specifies detailed log path for restoration and backup.
-meta string Yes None The IP address and port of the meta service.
-name string Yes None The name of backup.
--storage string Yes None The target storage URL of BR backup data. The format is: \<Schema>://\<PATH>.
Schema: Optional values are local and s3.
When selecting s3, you need to fill in s3.access_key, s3.endpoint, s3.region, and s3.secret_key.
PATH: The path of the storage location.
--s3.access_key string No None Sets AccessKey ID.
--s3.endpoint string No None Sets the S3 endpoint URL, please specify the HTTP or HTTPS scheme explicitly.
--s3.region string No None Sets the region or location to upload or download the backup.
--s3.secret_key string No None Sets SecretKey for AccessKey ID.

## Next to do¶

After the backup files are generated, you can use the BR to restore them for Nebula Graph. For more information, see Use BR to restore data.

Last update: February 16, 2022