Skip to content
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

tiflash: Update tiflash note of importing data by Lightning (#5201) #5239

Merged
merged 1 commit into from
Jan 4, 2021
Merged

tiflash: Update tiflash note of importing data by Lightning (#5201) #5239

Changes from all commits
Commits
Show all changes
1 commit
Select commit
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
4 changes: 3 additions & 1 deletion tiflash/use-tiflash.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,9 @@ ALTER TABLE `tpch50`.`lineitem` SET TIFLASH REPLICA 0
CREATE TABLE table_name like t
```

* 目前版本里，若先对表创建 TiFlash 副本，再使用 TiDB Lightning 导入数据，会导致数据导入失败。需要在使用 TiDB Lightning 成功导入数据至表后，再对相应的表创建 TiFlash 副本。
* 如果集群版本 \< v4.0.6，若先对表创建 TiFlash 副本，再使用 TiDB Lightning 导入数据，会导致数据导入失败。需要在使用 TiDB Lightning 成功导入数据至表后，再对相应的表创建 TiFlash 副本。

* 如果集群版本以及 TiDB Lightning 版本均 \>= v4.0.6，无论一个表是否已经创建 TiFlash 副本，你均可以使用 TiDB Lightning 导入数据至该表。但注意此情况会导致 TiDB Lightning 导入数据耗费的时间延长，具体取决于 TiDB Lightning 部署机器的网卡带宽、TiFlash 节点的 CPU 及磁盘负载、TiFlash 副本数等因素。

* 不推荐同步 1000 张以上的表，这会降低 PD 的调度性能。这个限制将在后续版本去除。

Expand Down