挂载之后，可以看到此LV的容量。
如果要在系统启动的时候启动LV，最好是将lvData写入fstable 文件中，如下所示：
使用Vim编辑器，打开/etc/fstab，在最后一行添加如图中所示，其中/dev/VolGroupdb/lvData指定需要挂载的分区LV，/usr/local/mysqldb指定要挂载的目录（挂载点），ext4分区文件系统格式，其它使用默认即可
又再次执行cmake 、make ,make install 的过程
[root@mysql80 ~]# cd /usr/local/
[root@mysql80 local]# ls
gcc-5.3.0 gmp-4.3.2 mpc-0.8.1 mpfr-2.4.2 mysql8 mysql-8.0.19 mysqldb
[root@mysql80 local]# chown -R mysql:mysql /usr/local/mysql8
[root@mysql80 local]# chown -R mysql:mysql /usr/local/mysqldb
[root@mysql80 local]#
Mv mysql-8.0.19 /usr/local/mysqldb/
Cd /usr/local/mysqldb/mysql-8.0.19
cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql8 -DMYSQL_DATADIR=/usr/local/mysqldb -DSYSCONFDIR=/etc -DMYSQL_TCP_PORT=3306 -DWITH_BOOST=/usr/local/mysql8/mysql-8.0.19/boost -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DENABLED_LOCAL_INFILE=ON -DWITH_INNODB_MEMCACHED=ON -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_FEDERATED_STORAGE_ENGINE=1 -DWITH_BLACKHOLE_STORAGE_ENGINE=1 -DWITH_ARCHIVE_STORAGE_ENGINE=1 -DWITHOUT_EXAMPLE_STORAGE_ENGINE=1 -DWITH_PERFSCHEMA_STORAGE_ENGINE=1 -DFORCE_INSOURCE_BUILD=1
查看/usr/local/mysql8目录
十四、编辑/etc/my.cnf （ 如果没有则创建）
[root@mysql57 mysql]# cd /etc
[root@mysql57 etc]# mv my.cnf my.cnf.bak
[root@mysql57 etc]# vi my.cnf
[root@mysql57 etc]#
[root@mysql57 etc]# cat my.cnf
[client]
port = 3306
socket = /tmp/mysql.sock
[mysqld]
port = 3306
socket = /tmp/mysql.sock
user = mysql
basedir = /usr/local/mysql8
datadir = /usr/local/mysqldb
pid-file = /usr/local/mysqldb /mysql.pid
log_error = /usr/local/mysqldb /mysql-error.log
slow_query_log = 1
long_query_time = 1
slow_query_log_file = /usr/local/mysqldb /mysql-slow.log
skip-external-locking
key_buffer_size = 32M
max_allowed_packet = 1024M
table_open_cache = 128
sort_buffer_size = 768K
net_buffer_length = 8K
read_buffer_size = 768K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
thread_cache_size = 16
query_cache_size = 16M
tmp_table_size = 32M
performance_schema_max_table_instances = 1000
explicit_defaults_for_timestamp = true
#skip-networking
max_connections = 500
max_connect_errors = 100
open_files_limit = 65535
log_bin=mysql-bin
binlog_format=mixed
server_id = 232
expire_logs_days = 10
early-plugin-load = “”
default_storage_engine = InnoDB
innodb_file_per_table = 1
innodb_buffer_pool_size = 128M
innodb_log_file_size = 32M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
[myisamchk]
key_buffer_size = 32M
sort_buffer_size = 768K
read_buffer = 2M
write_buffer = 2M
以上配置内容非必须，可依据实际情况，做相应的调整！
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