mysql历史数据自动归档_sdmei-CSDN博客_mysql 归档
- -数据库跑一段时间后,因为查询性能、磁盘容量,运维管理等方面的原因,需要将在线数据挪到历史库(不同的服务器). 如我们的在线订单只留3个月数据,3个月以前的就需要到历史库查了. 自动归档常见的方式有pt-archiver,但我还是觉得自己写存储过程更靠谱. 在线库实例打开federated支持,创建数据库dborder(业务库), linkhis(归档用);.
数据库跑一段时间后,因为查询性能、磁盘容量,运维管理等方面的原因,需要将在线数据挪到历史库(不同的服务器)。如我们的在线订单只留3个月数据,3个月以前的就需要到历史库查了。
自动归档常见的方式有pt-archiver,但我还是觉得自己写存储过程更靠谱。。。
思路:
日志记录表archive_log
create table archive_log
(
id bigint auto_increment PRIMARY key,
tab_name varchar(40),
archive_date_begin datetime,
archive_date_end datetime,
create_time datetime default CURRENT_TIMESTAMP(),
status int(1),
insert_rows bigint(11),
delete_rows bigint(11),
remark varchar(1000)
)
存储过程:proc_archive
CREATE PROCEDURE proc_archive(in i_table_source varchar(40),
in i_table_target varchar(40),
in i_fieldname varchar(40),
in i_keepdays int,
in i_archdays int,
in i_other_cond varchar(500))
begin
/*
入参:
i_table_source:原表,含dbname
i_table_target:federated表
i_fieldname:时间字段
i_keepdays:保留天数
i_archdays:每次归档多少天数据
i_other_cond:数据额外条件(如status in (2,3)不能归档,需要保留),无额外条件则输入'1=1'
归档日志表archive_log.status字段含义:
0:成功, 1:现有数据在保留天数内, 2:目标表含有待归档时间范围的数据,
3:插入数据和删除数据记录数不同, 4:SQL执行异常,具体错误见remark
注意:
有额外条件时,如果历史数据被修改,从不符合归档条件变成符合归档条件,
因历史表中归档时间段内已经有之前归档的数据(@v_his_num_before>0),程序会退出,需手动处理
*/
declare EXIT HANDLER for SQLWARNING,NOT FOUND,SQLEXCEPTION
begin
GET DIAGNOSTICS CONDITION 1 @p1=RETURNED_SQLSTATE,@p2= MESSAGE_TEXT;
ROLLBACK;
insert into archive_log(tab_name,archive_date_begin,archive_date_end,status,insert_rows,delete_rows,remark)
values(i_table_source,@v_arch_begin,@v_arch_end,4,@v_his_num_after,@v_del_num,concat('error ',@p1,' - ',@p2));
end;
/* 获取在线表的最小日期 */
set @mystmt = concat("select str_to_date(date_format(min(",i_fieldname,"),'%Y%m%d'),'%Y%m%d') into @v_arch_begin from ",i_table_source,' where ',i_other_cond);
prepare stmt from @mystmt;
execute stmt;
deallocate prepare stmt;
set @v_arch_end = date_add(@v_arch_begin,interval i_archdays day);
set @mystmt = concat("select count(*) into @v_his_num_before from ",i_table_target," where ",i_fieldname," >= ? and ",i_fieldname," < ?");
prepare stmt from @mystmt;
execute stmt using @v_arch_begin,@v_arch_end;
deallocate prepare stmt;
/* 如果在线表的数据低于keepday范围,退出 */
if timestampdiff(day,@v_arch_begin,now()) <= i_keepdays then
insert into archive_log(tab_name,archive_date_begin,archive_date_end,status,insert_rows,delete_rows,remark)
values(i_table_source,@v_arch_begin,@v_arch_end,1,0,0,concat('error, all data in keey days, min ',i_fieldname,': ',@v_arch_begin));
end if;
/* 如果历史表所在的日期区间有数据,退出(需要手动排查原因) */
if @v_his_num_before <> 0 then
insert into archive_log(tab_name,archive_date_begin,archive_date_end,status,insert_rows,delete_rows,remark)
values(i_table_source,@v_arch_begin,@v_arch_end,2,0,0,concat('error, data exists,row num:',@v_his_num_before));
end if;
if (timestampdiff(day,@v_arch_begin,now()) > i_keepdays and @v_his_num_before = 0) then
set @mystmt = concat("insert into ",i_table_target," select * from ",i_table_source," where ",i_fieldname," >= ? and ",i_fieldname," < ? and ",i_other_cond);
prepare stmt from @mystmt;
execute stmt using @v_arch_begin,@v_arch_end;
deallocate prepare stmt;
/* 因为federated引擎不支持事务,数据insert后再select下记录数,与下面的delete记录数对比,相同则提交delete操作 */
set @mystmt = concat("select count(*) into @v_his_num_after from ",i_table_target," where ",i_fieldname," >= ? and ",i_fieldname," < ?");
prepare stmt from @mystmt;
execute stmt using @v_arch_begin,@v_arch_end;
deallocate prepare stmt;
start transaction;
set @mystmt = concat("delete from ",i_table_source," where ",i_fieldname," >= ? and ",i_fieldname," < ? and ",i_other_cond);
prepare stmt from @mystmt;
execute stmt using @v_arch_begin,@v_arch_end;
set @v_del_num = row_count();
deallocate prepare stmt;
if @v_del_num = @v_his_num_after then
commit;
insert into archive_log(tab_name,archive_date_begin,archive_date_end,status,insert_rows,delete_rows,remark)
values(i_table_source,@v_arch_begin,@v_arch_end,0,@v_his_num_after,@v_del_num,'success');
else
rollback;
insert into archive_log(tab_name,archive_date_begin,archive_date_end,status,insert_rows,delete_rows,remark)
values(i_table_source,@v_arch_begin,@v_arch_end,3,@v_his_num_after,@v_del_num,'rollback, inserted rows num not equal to deleted rows num');
end if;
end if;
end;
存储过程proc_archive_pkg
CREATE PROCEDURE `proc_archive_pkg`()
begin
call proc_archive(
'dborder.myorder_tab', -- tabel source
'myorder_tab_his', -- table target
'create_time', -- time field name
120, -- i_keepdays
1, -- i_archdays
'1=1' -- i_other_cond
);
end;
归档日志表记录
最后一步就是用zabbix监控这个表的状态了。