之前提的描述不够详细，这次重新发了一个帖求助。
我这次只选择了一个300G的库做备份，
并且没有选择共享目录，而是直接备份在每个TIKV的本地，在本地创建同名的文件夹。
备份命令为： tiup br backup db --pd 192.168.40.92:2379 --db sbtest -s /tidb/share/
集群环境为3节点TIKV
最终checksum的时候报错
[ERROR] [main.go:59] [“br failed”] [error=“other error: Coprocessor task terminated due to exceeding the deadline”] [errorVerbose=“other error: Coprocessor task terminated due to exceeding the deadline\ngithub.com/pingcap/tidb/store/copr.(*copIteratorWorker).handleCopResponse\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/store/copr/coprocessor.go:1151\ngithub.com/pingcap/tidb/store/copr.(*copIteratorWorker).handleTaskOnce\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/store/copr/coprocessor.go:1035\ngithub.com/pingcap/tidb/store/copr.(*copIteratorWorker).handleTask\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/store/copr/coprocessor.go:912\ngithub.com/pingcap/tidb/store/copr.(*copIteratorWorker).run\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/store/copr/coprocessor.go:622\nruntime.goexit\n\t/usr/local/go/src/runtime/asm_amd64.s:1594”] [stack=“main.main\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/br/cmd/br/main.go:59\nruntime.main\n\t/usr/local/go/src/runtime/proc.go:250”]
以下为详细日志
br日志.txt (581.3 KB)
感觉刚开始备份就有警告爆出。
请大神指导一下可能的问题方向，不胜感激！
补充：
后来我增加了限速，但是还是失败了，备份过程中就有许多报错
