diff --git a/tikv-configuration-file.md b/tikv-configuration-file.md index b7251ab6de1f9..31a71bef5ac6f 100644 --- a/tikv-configuration-file.md +++ b/tikv-configuration-file.md @@ -2422,7 +2422,7 @@ Configuration items related to BR backup. > **Note:** > -> This configuration is introduced to address backup failures caused by S3 rate limiting. This problem has been fixed by [refining the backup data storage structure](/br/br-snapshot-architecture.md#structure-of-backup-files). Therefore, this configuration is deprecated from v6.1.1 and is no longer recommended. +> This configuration item was introduced to address backup failures caused by S3 rate limiting. Starting from TiDB v6.1.1, configure this value with caution. Setting it too large might cause large upload parts to fail or time out when the network is unstable. + The part size used when you perform multipart upload to S3 during backup. You can adjust the value of this configuration to control the number of requests sent to S3. + If data is backed up to S3 and the backup file is larger than the value of this configuration item, [multipart upload](https://docs.aws.amazon.com/AmazonS3/latest/API/API_UploadPart.html) is automatically enabled. Based on the compression ratio, the backup file generated by a 96-MiB Region is approximately 10 MiB to 30 MiB.