第一台机器备份操作
1.sudo yum install nfs-utils
2.sudo vi /etc/exports
3.sudo chown nobody:nobody -R /data/nfs_server
4.sudo systemctl restart nfs-server
5.sudo vi /etc/sysconfig/nfs  输入内容
RPCNFSDCOUNT=8
RPCNFSDARGS="-N 2 -N 3 -U"
NFSD_V4_GRACE=90
NFSD_V4_LEASE=90
6.sudo systemctl restart nfs-server
sudo vi /etc/sysctl.conf
sudo sysctl -w sunrpc.tcp_max_slot_table_entries=128
cat /proc/sys/sunrpc/tcp_max_slot_table_entries
7.obclient -h127.0.0.1 -P2881 -uroot -p'Passw'

obclient [(none)]> CREATE RESOURCE POOL dscom_resource_pool1
    -> UNIT = 'dscom_unit_config1',
    -> UNIT_NUM = 1,
    -> zone_list = ('zone1');
Query OK, 0 rows affected (0.022 sec)


obclient [(none)]> CREATE TENANT IF NOT EXISTS test_tenant
    ->                 PRIMARY_ZONE='zone1', 
    ->                 RESOURCE_POOL_LIST=('dscom_resource_pool1')
    ->                 set OB_TCP_INVITED_NODES='%';
Query OK, 0 rows affected (36.809 sec)

obclient [(none)]> ALTER SYSTEM SET LOG_ARCHIVE_DEST='LOCATION=file:///data/nfs/backup/archive' TENANT = test_tenant;
Query OK, 0 rows affected (0.107 sec)

obclient [(none)]> ALTER SYSTEM ARCHIVELOG TENANT = test_tenant;
Query OK, 0 rows affected (0.016 sec)

obclient [(none)]> SELECT TENANT_NAME, LOG_MODE FROM oceanbase.DBA_OB_TENANTS WHERE TENANT_TYPE = 'USER'\G
*************************** 1. row ***************************
TENANT_NAME: test_tenant
   LOG_MODE: ARCHIVELOG
1 row in set (0.038 sec)

obclient [(none)]> ALTER SYSTEM SET DATA_BACKUP_DEST= 'file:///data/nfs/backup/data' TENANT = test_tenant;
Query OK, 0 rows affected (0.052 sec)

obclient [(none)]> ALTER SYSTEM BACKUP DATABASE;
Query OK, 0 rows affected (0.038 sec)

第二台机器恢复操作
1.obclient -h127.0.0.1 -P2881 -uroot -p'Passw'

obclient [oceanbase]> CREATE RESOURCE UNIT dscom_unit_config1
    -> max_cpu = 1,
    -> min_cpu = 1,
    -> memory_size = '3G',
    -> log_disk_size = '3G';
Query OK, 0 rows affected (0.037 sec)


obclient [oceanbase]> CREATE RESOURCE POOL dscom_resource_pool1
    -> UNIT = 'dscom_unit_config1',
    -> UNIT_NUM = 1,
    -> zone_list = ('zone1');
Query OK, 0 rows affected (0.041 sec)

obclient [oceanbase]> ALTER SYSTEM RESTORE mysql FROM 'file:///data/nfs/backup/data,file:///data/nfs/backup/archive' WITH 'pool_list=dscom_resource_pool1';
Query OK, 0 rows affected (1 min 1.313 sec)