dataguard集群搭建
1. 创建虚拟机
创建一台虚拟机配置如下：
系统Red Hat Enterprise 6(64位)、16vCPU、8G内存、两块VM Network类型网卡、三块硬盘分别为250G、100G、50G(备注磁盘置备选择“Thin Provision”)、udev配置asm盘(vm虚拟机需配置参数：disk.enableUUID=true)、配置启动从网络启动。
2. 准备相关配置文件
2.1登录192.161.14.180机器，拷贝相关文件。
在/var/www/html/目录下创建test（备注文件可以自己取）文件
从/var/www/mt/* 目录下拷贝所有的*.properties、*.rsp、*.sh、*.cfg文件到/var/www/html/test文件下，并改相关文件名。
改完格式如下：
cfgrsp.properties db_test_sdb.rsp grid_test_sdb.rsp test_pdb.sh test_sdb.sh
db_test_pdb.rsp grid_test_pdb.rsp test_pdb.cfg test_sdb.cfg
2.2修改配置文件test_sdb.cfg
2.2.1修改iso文件url。
url --url=”http://172.16.219.180/OL6.6/dvd” ---如果搭建的是192.161.14.0网段改为” http://192.161.14.180/OL6.6/dvd”
2.2.2配置网络以及hostname
network --device=bond0 --noipv6 --bootproto=static --bondslaves=eth0,eth1 --bondopts=mode=active-backup,primary=eth0,miimon=80,updelay=60000 --ip=172.16.219.102 --netmask=255.255.255.0 --gateway=172.16.219.254 --onboot=yes --hostname test_sdb
---红色部分是需要根据实际情况修改
2.2.3磁盘分区
#part /boot/efi --fstype=efi --grow --maxsize=200 --size=50 --ondisk=sda –asprimary（使用UEFI格式启动，根据情况调整，我们选择Legacy模式，注销这行）
part /boot --fstype ext4 --size=500 --ondisk=sda --asprimary (/boot设置为500M)
part pv.0 --size=1 --grow --ondisk=sda
volgroup vg00 --pesize=32768 pv.0
logvol / --fstype ext4 --name=root --vgname=vg00 --size=51200(根目录设置为50G)
logvol /u01 --fstype=ext4 --name=var --vgname=vg00 --size=153600 –grow(/u01设置为150G余下的都给/u01)
logvol swap --fstype swap --name=swap --vgname=vg00 --size=8192（备注，设置为跟本机物理内存一般大小8G）
注意：我在创建虚拟机的时候第一个盘给了250G是用来做系统的，这里注意配置，以免硬盘空间不足。
2.2.4host文件设置
#pxe
172.16.219.180 pxe-server(备注：如果是14网段设置为192.161.14.180)
#172.16.219.102 mt_dg
172.16.219.121 test_pdb(备注：配置设置的ip和hostname名称)
172.16.219.121 test_sdb(备注：配置设置的ip和hostname名称)
2.2.5更改配置脚本路径名称
#获取自动安装脚本---start
wget -q -O /opt/test_sdb.sh http://pxe-server/test/test_sdb.sh
chmod +x /opt/test_sdb.sh
touch /test_sdb.log
echo '@reboot root /opt/test_sdb.sh > /test_sdb.log' >> /etc/crontab
(修改红色部分内容)
2.3修改脚本文件test_sdb.sh
2.3.1修改GI软件的文件路径及其名称。
su - grid -c 'wget -q -O /home/grid/grid.rsp http://pxe-server/test/grid_test_sdb.rsp'
su - grid -c '/u01/grid/runInstaller -silent -ignoreSysPrereqs -ignorePrereq -showProgress -responseFile "/home/grid/grid.rsp"
su - grid -c 'wget -q -O /u01/app/11.2.0/grid/cfgtoollogs/cfgrsp.properties http://pxe-server/test/cfgrsp.properties(备注：红色部分是要修改的)
2.3.2修改diskgoup分区
CREATE DISKGROUP DATA EXTERNAL REDUNDANCY
DISK '/dev/asm-diskb' SIZE 100G
ATTRIBUTE 'compatible.asm'='11.2.0.0.0','au_size'='1M';
CREATE DISKGROUP FRA EXTERNAL REDUNDANCY
DISK '/dev/asm-diskc' SIZE 50G
ATTRIBUTE 'compatible.asm'='11.2.0.0.0','au_size'='1M';
(备注：设置大小分别为第二块盘、第三块盘的大小)
2.3.3修改DB软件的文件路径及其名称
su - oracle -c 'wget -q -O /home/oracle/db.rsp http://pxe-server/test/db_test_sdb.rsp'
su - oracle -c '/u01/database/runInstaller -silent -ignoreSysPrereqs -ignorePrereq -showProgress -printdiskusage -printmemory -printtime -responseFile "/home/oracle/db.rsp"
(备注：红色部分是要修改的)
2.3.4修改监控环境安装脚本
ALTER SYSTEM SET remote_listener='test_sdb:1521';(备注：红色部分要修改)
2.3.5修改脚本名称
sed -i '/@reboot root /opt/test_sdb.sh > /test_sdb.log/d' /etc/crontab
(备注：红色部分要修改)
2.4修改grid_test_sdb.rsp文件
2.4.1修改ORACLE_HOMENAME
ORACLE_HOMENAME=test_sdb(备注：红色部分要修改)
2.5修改db_test_sdb.rsp文件
2.5.1修改ORACLE_HOMENAME
ORACLE_HOMENAME=test_sdb(备注：红色部分要修改)
(备注：如果是双节点，按上面操作)
3. dhcp以及菜单的配置
3.1选择配置dhcpd.conf文件
根据所选网段不同，可以选择拷贝dhcpd.conf.219、dhcpd.conf.14文件覆盖dhcpd.conf文件根据需要修改配置文件dhcpd.conf中的获取ip网段、并重启dhcpd服务。
dhcpd.conf配置文件如下：
#
# DHCP Server Configuration file.
# see /usr/share/doc/dhcp*/dhcpd.conf.sample
# see 'man 5 dhcpd.conf'
#
Allow booting;
Allow bootp;
authoritative;
default-lease-time 600;
max-lease-time 7200;
ddns-update-style none;
option space PXE;
option PXE.mtftp-ip code 1 = ip-address;
option PXE.mtftp-cport code 2 = unsigned integer 16;
option PXE.mtftp-sport code 3 = unsigned integer 16;
option PXE.mtftp-tmout code 4 = unsigned integer 8;
option PXE.mtftp-delay code 5 = unsigned integer 8;
option arch code 93 = unsigned integer 16;
option broadcast-address 255.255.255.255;
subnet 172.16.219.0 netmask 255.255.255.0 {
option routers 172.16.219.1;
option subnet-mask 255.255.255.0;
always-broadcast on;
range dynamic-bootp 172.16.219.200 172.16.219.253;
class "pxeclients" {
match if substring (option vendor-class-identifier, 0, 9) = "PXEClient";
next-server 172.16.219.180;
if option arch = 00:02 {
filename "ia64/elilo.efi";
} else if option arch = 00:06 {
filename "X86PC/bootia32.efi";
} else if option arch = 00:07 {
filename "UEFI/BOOTX64.efi";
} else {
filename "Legacy/pxelinux.0";
}
}
}
(备注：红色部分可以根据需要自行修改)
3.2增加启动菜单
根据BIOS启动模式不同可以选择Legacy、UEFI两种模式
Legacy:/var/lib/tftpboot/Legacy/pxelinux.cfg/default配置文件如下：
timeout 100
prompt 0
default menu.c32
ONTIMEOUT local
#CONSOLE 0
#SERIAL 0 9600
menu title ==== Linux PXE Boot Menu ====
label 0
menu label ^ 0) Just Wait .....
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://192.161.14.180/xxxxxxxxxx.cfg ksdevice=eth0
label 1
menu label ^ 1) rac1-Server
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://192.161.14.180/ol6.5x64-rac1-ks.cfg ksdevice=eth0
label 2
menu label ^ 2) rac2-Server
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://192.161.14.180/ol6.5x64-rac2-ks.cfg ksdevice=eth0
label 3
menu label ^ 3) rac1-san-Server
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://192.161.14.180/ol6.5x64-rac1-san-ks.cfg ksdevice=eth0
label 4
menu label ^ 4) rac2-san-Server
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://192.161.14.180/ol6.5x64-rac2-san-ks.cfg ksdevice=eth0
label 5
menu label ^ 5) rhel5.11x64-standalone
kernel OL5/vmlinuz
append initrd=OL5/initrd.img ks=http://172.16.219.180/ol5x64-standalone-ks.cfg ksdevice=eth0
label 6
menu label ^ 6) ol6.5x64-dg1
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/219/ol6.5x64-standalone-dg1-ks.cfg ksdevice=eth0
label 7
menu label ^ 7) ol6.5x64-dg2
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/219/ol6.5x64-standalone-dg2-ks.cfg ksdevice=eth0
label 8
menu label ^ 8) ol6.5x64-dg3
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/219/ol6.5x64-standalone-dg3-ks.cfg ksdevice=eth0
label 9
menu label ^ 9) ol6.5x64-rman1
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/219/ol6.5x64-standalone-rman1-ks.cfg ksdevice=eth
0
label 10
menu label ^ 10) ol6.5x64-warehouse
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/219/ol6.5x64-standalone-warehouse-ks.cfg ksdevice
=eth0
label 11
menu label ^ 11) performancetest
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/219/ol6.5x64-standalone-pt-ks.cfg ksdevice=eth0
label 12
menu label ^ 12) mt_pdb
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/mt/mt_pdb.cfg ksdevice=eth0
label 13
menu label ^ 13) mt_sdb
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/mt/mt_sdb.cfg ksdevice=eth0
label 14
menu label ^ 14) test_pdb
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/test/test_pdb.cfg ksdevice=eth0
label 15
menu label ^ 15) test_sdb
kernel OL6/vmlinuz
append initrd=OL6/initrd.img ks=http://172.16.219.180/test/test_sdb.cfg ksdevice=eth0
(备注：根据格式，设置好名称以及路径)
UEFI: /var/lib/tftpboot/UEFI/efidefault配置文件如下：
efault=0
timeout=10
splashimage=(nd)/splash.xpm.gz
title Just Wait .....
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://172.16.219.180/219/xxxxxxxxxxx.cfg ksdevice=eth0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Oracle Linux 6.5 x86_64 use Kickstart - Standalone(219-rman1)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://172.16.219.180/219/ol6.5x64-standalone-rman1-ks.cfg ksdevice=eth
0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Oracle Linux 6.5 x86_64 use Kickstart - Standalone(219-rman2)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://172.16.219.180/219/ol6.5x64-standalone-rman2-ks.cfg ksdevice=eth
0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Oracle Linux 6.5 x86_64 use Kickstart - Standalone(219-rman3)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://172.16.219.180/219/ol6.5x64-standalone-rman3-ks.cfg ksdevice=eth
0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Oracle Linux 6.5 x86_64 use Kickstart - Standalone(219-dg1)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://172.16.219.180/219/ol6.5x64-standalone-dg1-ks.cfg ksdevice=eth0
ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Oracle Linux 6.5 x86_64 use Kickstart - Standalone(219-dg2)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://172.16.219.180/219/ol6.5x64-standalone-dg2-ks.cfg ksdevice=eth0
ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Oracle Linux 6.5 x86_64 use Kickstart - Standalone(219-warehouse)
root (nd)
title Install Oracle Linux 6.5 x86_64 use Kickstart - for RAC Node1(219)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://172.16.219.180/219/ol6x64-rac1-ks.cfg ksdevice=eth0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Oracle Linux 6.5 x86_64 use Kickstart - for RAC Node2(219)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://172.16.219.180/219/ol6x64-rac2-ks.cfg ksdevice=eth0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Oracle Linux 6.5 x86_64 use Kickstart - Standalone(192.161.14.132)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://192.161.14.180/14/ol6.5x64-standalone-sumapay_test1-ks.cfg ksdev
ice=eth0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Standalone(192.161.14.133)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://192.161.14.180/14/ol6.5x64-standalone-sumapay_test2-ks.cfg ksdev
ice=eth0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install Oracle Linux 6.6 x86_64 use Kickstart - Standalone(192.161.14.149)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://192.161.14.180/14/ol6.5x64-standalone-sumapay_baobiao-ks.cfg ksd
evice=eth0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
title Install warehouse(192.161.14.172)
root (nd)
kernel (nd)/images/OL6/vmlinuz ks=http://192.161.14.180/14/ol6.5x64-standalone-sumapay_warehouse-ks.cfg k
sdevice=eth0 ip=dhcp
initrd (nd)/images/OL6/initrd.img
(备注：根据格式，设置好名称以及路径)
重启xinetd服务 service xinetd restart
4. 主从库的操作
4.1主、从库操作配置listener.ora、tnsnames.ora配置如下：
主：vi /u01/app/11.2.0/grid/network/admin/listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = sumapay)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)
(SID_NAME = sumapay)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = test_pdb)(PORT = 1521))
)
)
ADR_BASE_LISTENER = /u01/app/grid
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON # line added by Agent
从：vi /u01/app/11.2.0/grid/network/admin/listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = sumapay)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)
(SID_NAME = sumapay)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = test_sdb)(PORT = 1521))
)
)
ADR_BASE_LISTENER = /u01/app/grid
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON # line added by Agent
主、从：vi /u01/app/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora
test_pdb =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = test_pdb)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = sumapay)
)
)
test_sdb =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = test_sdb)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = sumapay)
)
)
4.2重启主从库的监听服务
su – grid
lsnrctl restart
tnsing test_pdb
tnsting test_sdb
测试两台机器是否连通正常。（备注：注意/etc/hosts文件）
4.3拷贝密码文件、以及相关脚本文件
将主库的密码文件/u01/app/oracle/product/11.2.0/db_1/dbs/orapwsumapay拷贝覆盖从库的文件并注意文件权限。重置从库中的/u01/app/oracle/product/11.2.0/db_1/dbs/initsumapay.ora 文件。
echo '*.db_name=sumapay' > /u01/app/oracle/product/11.2.0/db_1/dbs/initsumapay.ora
在主、从库创建/home/oracle/dg_manage文件，并上传相关脚本文件。并赋予执行权限。
check_dg_status.sh prim2stan.sh stan2prim_force.sh stan2prim.sh startMRP.sh
4.4主从进行相关设置，并设置主库为归档模式。
sqlplus / as sysdba<<EOF
select file_name from dba_data_files;
select name from v$tempfile;
CREATE TABLESPACE ts_tvpay
DATAFILE '+DATA' SIZE
2048M REUSE AUTOEXTEND
ON NEXT 50M MAXSIZE 10240M,
'+DATA' SIZE 2048M REUSE
AUTOEXTEND
ON NEXT 50M MAXSIZE 10240M,
'+DATA' SIZE 2048M REUSE
AUTOEXTEND
ON NEXT 50M MAXSIZE 10240M,
'+DATA' SIZE 2048M REUSE
AUTOEXTEND
ON NEXT 50M MAXSIZE 10240M,
'+DATA' SIZE 2048M REUSE
AUTOEXTEND
ON NEXT 50M MAXSIZE 10240M,
'+DATA' SIZE 2048M REUSE
AUTOEXTEND
ON NEXT 50M MAXSIZE 10240M,
'+DATA' SIZE 2048M REUSE
AUTOEXTEND
ON NEXT 50M MAXSIZE 10240M,
'+DATA' SIZE 2048M REUSE
AUTOEXTEND
ON NEXT 50M MAXSIZE 10240M
EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO;
CREATE TEMPORARY TABLESPACE ts_tvpay_temp
TEMPFILE '+DATA' SIZE 1024M AUTOEXTEND ON
NEXT 32M MAXSIZE 8192M,
'+DATA' SIZE 1024M AUTOEXTEND ON
NEXT 32M MAXSIZE 8192M,
'+DATA' SIZE 1024M AUTOEXTEND ON
NEXT 32M MAXSIZE 8192M,
'+DATA' SIZE 1024M AUTOEXTEND ON
NEXT 32M MAXSIZE 8192M
EXTENT MANAGEMENT LOCAL;
select file_name from dba_data_files;
select name from v$tempfile;
CREATE USER tvpay2 IDENTIFIED BY tvpay
DEFAULT TABLESPACE ts_tvpay
TEMPORARY TABLESPACE ts_tvpay_temp;
GRANT CONNECT,RESOURCE TO tvpay2;
quit;
EOF
sqlplus / as sysdba << EOF
alter system set db_unique_name=test_pdb scope=spfile;
EOF
sqlplus / as sysdba << EOF
alter system set log_archive_config='DG_CONFIG=(test_pdb,test_sdb)' scope=spfile;
EOF
sqlplus / as sysdba << EOF
alter system set log_archive_dest_1='LOCATION=USE_DB_RECOVERY_FILE_DEST valid_for=(all_logfiles,all_roles) db_unique_name=test_pdb' scope=spfile;
alter system set log_archive_dest_2='SERVICE=test_sdb optional lgwr async noaffirm net_timeout=30 valid_for=(online_logfiles,primary_role) db_unique_name=test_sdb' scope=spfile;
EOF
sqlplus / as sysdba << EOF
alter system set db_file_name_convert='+DATA/test_sdb/datafile','+DATA/test_pdb/datafile','+DATA/{test_sdb/tempfile','+DATA/test_pdb/tempfile' scope=both;
EOF
sqlplus / as sysdba << EOF
ALTER SYSTEM set log_file_name_convert='+DATA/test_sdb/onlinelog','+DATA/test_pdb/onlinelog','+FRA/test_sdb/onlinelog','+FRA/test_pdb/onlinelog' sope=both;
EOF
sqlplus / as sysdba << EOF
alter system set FAL_SERVER=test_sdb scope=spfile;
EOF
sqlplus / as sysdba << EOF
alter system set FAL_CLIENT=test_pdb scope=spfile;
EOF
sqlplus / as sysdba << EOF
alter system set standby_file_management=AUTO scope=spfile;
EOF
sqlplus / as sysdba << EOF
ALTER SYSTEM SET REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE SCOPE=SPFILE;
EOF
shutdown immediate;
设置主库为归档模式
startup mount
alter database archivelog;
alter database open;
alter system switch logfile; --切换log日志
4.5主从交互操作
从：sqlplus / as sysdba << EOF
startup nomount force pfile=/u01/app/oracle/product/11.2.0/db_1/dbs/initsumapay.ora
EOF
主：rman target /
RMAN>connect auxiliary sys/password@test_sdb
RMAN> run{
duplicate target database for standby nofilenamecheck dorecover from active database
spfile
set cluster_database='false'
set db_unique_name='test_sdb'
set log_archive_max_processes='30'
set fal_client='test_pdb'
set fal_server='test_sdb'
set standby_file_management='AUTO'
set log_archive_config='DG_CONFIG=(test_pdb,test_sdb)'
set log_archive_dest_1='LOCATION=USE_DB_RECOVERY_FILE_DEST valid_for=(all_logfiles,all_roles) db_unique_name=test_sdb'
set log_archive_dest_2='service=test_pdb optional lgwr async noaffirm valid_for=(online_logfiles,primary_role) db_unique_name=test_pdb'
set db_file_name_convert='+DATA/test_pdb/datafile','+DATA/test_sdb/datafile','+DATA/test_pdb/tempfile','+DATA/test_sdb/tempfile'
set log_file_name_convert='+DATA/test_pdb/onlinelog','+DATA/test_sdb/onlinelog','+FRA/test_pdb/onlinelog','+FRA/test_sdb/onlinelog'
set remote_listener='test_sdb:1521';
}
在从库中查看执行结果：
tail -f /u01/app/oracle/diag/rdbms/mt_pdb/sumapay/trace/alert_sumapay.log
在从库中执行同步脚本startMRP.sh
同步完成后，在主库中切换一下日志，查看当前正在使用的日志，然后看从库的日志是否切换过来。如下所示：
操作前：
主：
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 12
Next log sequence to archive 14
Current log sequence 14
从：
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 12
Next log sequence to archive 0
Current log sequence 14
操作后:
主：
SQL> alter system switch logfile;
System altered.
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 13
Next log sequence to archive 15
Current log sequence 15
SQL>
从：
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 13
Next log sequence to archive 0
Current log sequence 15
SQL>
同步一致