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Signed-off-by: haojinming <jinming.hao@pingcap.com>
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haojinming 2022-11-18 15:59:06 +08:00
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content/docs/dev/concepts/explore-tikv-features/backup-restore.md
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@ -21,7 +21,7 @@ menu:
### Recommended Deployment Configuration
- In production environments, deploy `TiKV-BR` on a node with at least 8 cores CPU and 16 GB memory. Select an appropriate OS version by following [Linux OS version requirements](https://docs.pingcap.com/tidb/dev/hardware-and-software-requirements#linux-os-version-requirements).
- In production environments, deploy `TiKV-BR` on a node with at least 4 cores CPU and 8 GB memory. Select an appropriate OS version by following [Linux OS version requirements](https://docs.pingcap.com/tidb/dev/hardware-and-software-requirements#linux-os-version-requirements).
- Save backup data to Amazon S3 or other shared storage, for example mounting a NFS on all `TiKV-BR` and `TiKV` nodes.
@ -176,12 +176,12 @@ The backup and restoration are both distributed. So the backup and restoration p
|:-:|:-:|:-:|
|Max storage size|50T|50T|
|Backup speed|40MB/s per TiKV node|40MB/s per TiKV node|
|Restore speed|70MB/s per TiKV node|70MB/s per TiKV node|
|Restoration speed|70MB/s per TiKV node|70MB/s per TiKV node|
|Performance impact|20% on QPS/Latency|20% on QPS/Latency|
#### Performance tuning
If you want to reduce the impact of backup tasks on the cluster, you can enable the [`auto-tune`](https://docs.pingcap.com/zh/tidb/stable/tikv-configuration-file#enable-auto-tune-%E4%BB%8E-v54-%E7%89%88%E6%9C%AC%E5%BC%80%E5%A7%8B%E5%BC%95%E5%85%A5) feature. With this feature enabled, BR performs backup tasks as fast as possible without excessively affecting the cluster.
If you want to reduce the impact of backup tasks on the cluster, you can enable the [`auto-tune`](https://docs.pingcap.com/zh/tidb/stable/tikv-configuration-file#enable-auto-tune-%E4%BB%8E-v54-%E7%89%88%E6%9C%AC%E5%BC%80%E5%A7%8B%E5%BC%95%E5%85%A5) feature. With this feature enabled, TiKV-BR performs backup tasks as fast as possible without excessively affecting the cluster.
Alternatively, you can limit the backup speed by using the TiKV configuration item [`backup.num-threads`](https://docs.pingcap.com/zh/tidb/stable/tikv-configuration-file#num-threads-1) or using the parameter `--ratelimit`.