你试一下。我是这么备份的
export AWS_ACCESS_KEY_ID=
export AWS_SECRET_ACCESS_KEY=
br backup db --pd “mypd01:2379” --db mydb --storage “s3://tidb-backup/full/” --s3.endpoint=“https://obs.cn-north-1.myhuaweicloud.com” --send-credentials-to-tikv=true --ratelimit 128 --log-file backuptable.log
