# `BR` Usage Restrictions

+ When `BR` restores data to the upstream cluster of `TiCDC`, `TiCDC` cannot replicate the restored data to the downstream cluster
+ If the following features are not consistently enabled or disabled during backup and restoration, compatibility issues might occur:
  + Global system variable **`tidb_enable_clustered_index`**
  + `TiDB` configuration parameter **`new_collations_enabled_on_first_bootstrap`**
+ Global temporary tables are NOT compatible with `BR` before version `v5.3.0`
+ `BR` restoring uses resources of the target cluster as much as possible, it is not recommended that you restore data to a production cluster
+ `Amazon S3`, `Google Cloud Storage`, and `Azure Blob Storage` are recommended to store backup data
+ Make sure that the `BR` and `TiKV` nodes, and the backup storage system have sufficient network bandwidth to ensure sound `write/read` performance
  
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