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Update 3.backup-data.md #1898

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Feb 2, 2023
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Update 3.backup-data.md #1898

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2 changes: 1 addition & 1 deletion docs-2.0/backup-and-restore/nebula-br-ent/3.backup-data.md
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Expand Up @@ -13,7 +13,7 @@ You can use BR (Enterprise Edition) to back up NebulaGraph data. You can perform
- During the process of a full backup, it may take a long time if the amount of the data to be backed up is large.
- During the process of data backup, DDL and DML statements in the specified graph space are blocked. We recommend that you perform the backup operation during the low business peak period.
- The cluster performing an incremental backup needs to be the same as the cluster specified for the previous backup. The storage path of the incremental backup should also be the same as the path of the previous backup.
- Make sure that the time between each incremental backup and the first backup is less than one [`wal_ttl`](../../5.configurations-and-logs/1.configurations/4.storage-config.md).
- Make sure that the time between each incremental backup and the last backup is less than a [`wal_ttl`](../../5.configurations-and-logs/1.configurations/4.storage-config.md) time.
- Make sure that Agent has read and write permissions for the corresponding NebulaGraph cluster installation directory and backup directory.

## Prerequisites
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