Skip to content

br: removed the sentence about the outdated restore speed (#20973) #20981

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Oct 9, 2025
Merged

br: removed the sentence about the outdated restore speed (#20973) #20981

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
0de7646
This is an automated cherry-pick of #20973
qiancai Oct 9, 2025
8f68cd0
resolve conflicts
qiancai Oct 9, 2025
2b47d54
Update br/br-snapshot-guide.md
qiancai Oct 9, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion br/br-snapshot-guide.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -202,7 +202,7 @@ TiDB 备份功能对集群性能（事务延迟和 QPS）有一定的影响，
### 快照恢复的性能与影响

- TiDB 恢复的时候会尽可能打满 TiKV CPU、磁盘 IO、网络带宽等资源，所以推荐在空的集群上执行备份数据的恢复，避免对正在运行的业务产生影响。
- 备份数据的恢复速度与集群配置、部署、运行的业务都有比较大的关系。在内部多场景仿真测试中，单 TiKV 存储节点上备份数据恢复速度能够达到 100 MiB/s。在不同用户场景下，快照恢复的性能和影响应以实际测试结论为准。
- 备份数据的恢复速度与集群配置、部署、运行的业务都有比较大的关系。在不同用户场景下，快照恢复的性能和影响应以实际测试结论为准。
- BR 提供了粗粒度的 Region 打散算法，用于提升大规模 Region 场景下的 Region 恢复速度。该算法通过命令行参数 `--granularity="coarse-grained"` 控制，并默认启用。在这个方式下每个 TiKV 节点会得到均匀稳定的下载任务，从而充分利用每个 TiKV 节点的所有资源实现并行快速恢复。在实际案例中，大规模 Region 场景下，集群快照恢复速度最高提升约 3 倍。使用示例如下：

```bash
Expand Down