一、环境的基础校验
tidb中自动选择引擎的方式，并不是默认选择tiflash的方式进行测试，用测试oltp_update_non_index.lua进行举例，如何测试tidb的方法。
1、首先搭建到sysbench的环境
2、创建测试表
sysbench /usr/local/share/sysbench/oltp_update_non_index.lua --mysql-user=root --mysql-password='' --mysql-host=192.168.30.43 --mysql-port=4000 --mysql-db=sysbench_test --tables=5 --table_size=1 --threads=4 --time=300 --report-interval=10 prepare
3、按表构建tiflash副本
ALTER TABLE sysbench_test.sbtest1 SET TIFLASH REPLICA 1;
ALTER TABLE sysbench_test.sbtest2 SET TIFLASH REPLICA 1;
ALTER TABLE sysbench_test.sbtest3 SET TIFLASH REPLICA 1;
ALTER TABLE sysbench_test.sbtest4 SET TIFLASH REPLICA 1;
ALTER TABLE sysbench_test.sbtest5 SET TIFLASH REPLICA 1;
4、查看每个表的结构
表构建为tiflash之前的显示如下：
mysql> desc select count(*) from sbtest5;
+----------------------------+-------------+-----------+---------------+---------------------------------+
| id | estRows | task | access object | operator info |
+----------------------------+-------------+-----------+---------------+---------------------------------+
| StreamAgg_16 | 1.00 | root | | funcs:count(Column#7)->Column#5 |
| └─TableReader_17 | 1.00 | root | | data:StreamAgg_8 |
| └─StreamAgg_8 | 1.00 | cop[tikv] | | funcs:count(1)->Column#7 |
| └─TableFullScan_15 | 10138288.00 | cop[tikv] | table:sbtest5 | keep order:false |
+----------------------------+-------------+-----------+---------------+---------------------------------+
4 rows in set (0.01 sec)
表构建为tiflash之后的显示如下：
mysql> desc select count(*) from sbtest1;
+------------------------------+----------+--------------+---------------+---------------------------------+
| id | estRows | task | access object | operator info |
+------------------------------+----------+--------------+---------------+---------------------------------+
| HashAgg_21 | 1.00 | root | | funcs:count(Column#7)->Column#5 |
| └─TableReader_23 | 1.00 | root | | data:ExchangeSender_22 |
| └─ExchangeSender_22 | 1.00 | mpp[tiflash] | | ExchangeType: PassThrough |
| └─HashAgg_9 | 1.00 | mpp[tiflash] | | funcs:count(1)->Column#7 |
| └─TableFullScan_20 | 10000.00 | mpp[tiflash] | table:sbtest1 | keep order:false, stats:pseudo |
+------------------------------+----------+--------------+---------------+---------------------------------+
5 rows in set (0.00 sec)
二、sysbench测试Tiflash的insert
1、创建5张表，并插入一行数据到表中，脚本如下
[root@HAST04 ~]# sysbench /usr/local/share/sysbench/oltp_insert.lua --mysql-user=root --mysql-password='' --mysql-host=192.168.30.43 --mysql-port=4000 --mysql-db=sysbench_test --tables=5 --table_size=1 --threads=4 --time=300 --report-interval=10 prepare
2、执行按表构建tiflash副本，分别是sbtest1到sbtest5都要执行
ALTER TABLE sysbench_test.sbtest5 SET TIFLASH REPLICA 1;
3、查看表的显示
mysql> desc select count(*) from sbtest5;
+----------------------------+----------+-----------+---------------+---------------------------------+
| id | estRows | task | access object | operator info |
+----------------------------+----------+-----------+---------------+---------------------------------+
| StreamAgg_16 | 1.00 | root | | funcs:count(Column#7)->Column#5 |
| └─TableReader_17 | 1.00 | root | | data:StreamAgg_8 |
| └─StreamAgg_8 | 1.00 | cop[tikv] | | funcs:count(1)->Column#7 |
| └─TableFullScan_15 | 10000.00 | cop[tikv] | table:sbtest5 | keep order:false, stats:pseudo |
+----------------------------+----------+-----------+---------------+---------------------------------+
4、此时你会疑惑，为啥tiflash的副本已经构建了，为什么还是cop[tikv] 存储？那么此时不用着急，继续往下看，再次向表中插入一条数据，就会发现已经变成了cop[tiflash]
#####查看表结构
mysql> show create table sbtest5;
| sbtest5 | CREATE TABLE `sbtest5` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`k` int(11) NOT NULL DEFAULT '0',
`c` char(120) NOT NULL DEFAULT '',
`pad` char(60) NOT NULL DEFAULT '',
PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin AUTO_INCREMENT=667583
1 row in set (0.05 sec)
#####插入数据与查看表结构
mysql> insert into sbtest5 values(123,123,'re','r');
Query OK, 1 row affected (0.05 sec)
mysql> desc select count(*) from sbtest5;
+--------------------------+---------+--------------+---------------+--------------------------------+
| id | estRows | task | access object | operator info |
+--------------------------+---------+--------------+---------------+--------------------------------+
| StreamAgg_11 | 1.00 | root | | funcs:count(1)->Column#5 |
| └─TableReader_19 | 1.00 | root | | data:TableFullScan_18 |
| └─TableFullScan_18 | 1.00 | cop[tiflash] | table:sbtest5 | keep order:false, stats:pseudo |
+--------------------------+---------+--------------+---------------+--------------------------------+
3 rows in set (0.01 sec)
5、此时继续运行sysbench的insert脚本即可，insert的过程中你观察表结构仍然会是tiflash的存储。如下的执行结果中可以看出tidb的tiflash引擎在5分钟内，4个并发的条件下insert插入数据总共是39004行，通过测试结果可得637.83 per sec的速度在插入数据。
mysql> desc select count(*) from sbtest5;
+------------------------------+----------+--------------+---------------+---------------------------------+
| id | estRows | task | access object | operator info |
+------------------------------+----------+--------------+---------------+---------------------------------+
| HashAgg_21 | 1.00 | root | | funcs:count(Column#7)->Column#5 |
| └─TableReader_23 | 1.00 | root | | data:ExchangeSender_22 |
| └─ExchangeSender_22 | 1.00 | mpp[tiflash] | | ExchangeType: PassThrough |
| └─HashAgg_9 | 1.00 | mpp[tiflash] | | funcs:count(1)->Column#7 |
| └─TableFullScan_20 | 39004.00 | mpp[tiflash] | table:sbtest5 | keep order:false |
+------------------------------+----------+--------------+---------------+---------------------------------+
5 rows in set (0.03 sec)
