clickhouse 备份与还原

张映 发表于 2021-08-26

分类目录: clickhouse

标签:, ,

网上找了找备份还原的方法,实践如下

clickhouse-client -udefault --password netjoy1234 -h127.0.0.1 --query="select * from netjoytest1.tank1 FORMAT CSV" > /home/tidb/ck_bak/1.csv 

clickhouse-client -udefault --password netjoy1234 -h127.0.0.1 --query="insert into netjoytest1.tank2 FORMAT CSV" < /home/tidb/ck_bak/1.csv 

[tidb@testjian ck_bak]$ cat 1.csv
2,"tank",0,"2021-08-23 14:21:30"
3,"tank",0,"2021-08-23 14:21:30"
4,"tank",0,"2021-08-23 14:21:30"

clickhouse-client -udefault --password netjoy1234 -h127.0.0.1 --query="select * from netjoytest1.tank1 " > /home/tidb/ck_bak/1.txt
clickhouse-client -udefault --password netjoy1234 -h127.0.0.1 --query="insert into netjoytest1.tank2 FORMAT TabSeparated" < /home/tidb/ck_bak/1.txt

[tidb@testjian ck_bak]$ cat 1.txt
2	tank	0	2021-08-23 14:21:30
3	tank	0	2021-08-23 14:21:30
4	tank	0	2021-08-23 14:21:30

这二个方法是一样的。缺点如下:

1,备份,还原单一,不能到库只能到表

2,如果单表太大,例如4亿的数据量,导出50多个G,上面的方式估计实现不了。

 



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作者:海底苍鹰
地址:http://blog.51yip.com/clickhouse/2528.html

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