达梦数据库备份恢复

 

 

1. 登录

disql sysdba/sysdba

1.   查看当前是否处于归档模式（在线热备必须处于归档模式）

00001. 

SQL>select arch_mode from v$database;

00002. 

00003. 

    LINEID     ARCH_MODE

00004. 

00005. 

    ---------- ---------

00006. 

00007. 

    1          N   

00008. 

3. 设置归档模式

1) 编辑dm.ini

默认路径： /opt/dmdbms/data/DAMENG/dm.ini

编辑该文件，设置： "ARCH_INI = 1"

2) 设置归档目录

mkdir /opt/dmdbms/data/DAMENG/arch

3) 配置dmarch.ini (/opt/dmdbms/data/DAMENG/dmarch.ini)

00001. 

[ARCHIVE_LOCAL1]

00002. 

00003. 

    ARCH_TYPE = LOCAL

00004. 

00005. 

    ARCH_DEST = /opt/dmdbms/data/DAMENG/arch

00006. 

00007. 

    ARCH_FILE_SIZE = 128 #归档文件大小限制Mb为单位，缺省128M

00008. 

00009. 

    ARCH_SPACE_LIMIT = 0 #空间限制MB为单位，范围1024 ~ 4294967294，默认0表示无空间限制

00010. 

4) 重启数据库生效

dmserver path=/opt/dmdbms/data/DAMENG/dm.ini

或

/etc/init.d/DmServiceDMSERVER restart

重新查询，已生效

00001. 

SQL>select arch_mode from v$database;

00002. 

00003. 

 

00004. 

00005. 

    LINEID     ARCH_MODE

00006. 

00007. 

    ---------- ---------

00008. 

00009. 

    1          Y        

00010. 

4. create tablespace,user and test tables

1) query tablespace

SQL>SELECT ts.NAME, df.PATH FROM V$TABLESPACE AS ts, V$DATAFILE AS df WHERE ts.ID = df.GROUP_ID;

2) create tablespace

SQL>create tablespace duanbb DATAFILE '/opt/dmdbms/data/DAMENG/DUANBB.DBF' SIZE 128;

3) create user

00001. 

SQL>create user duanbb identified by duanbb default tablespace "DUANBB";

00002. 

00003. 

SQL>grant resource to DUANBB;

00004. 

4) create tables

00001. 

SQL>conn DUANBB/DUANBB

00002. 

00003. 

SQL>create table t1(ID NUMBER(10), NAME VARCHAR(30));

00004. 

5. backup/restore
1) database full backup/restore

  a) online backup

SQL>BACKUP DATABASE FULL TO full_bak BAKFILE '/test/duanbb/DM/backup/full.bak';

  b) restore: 对于数据库级的还原只支持脱机还原，不提供联机还原的功能

/etc/init.d/DmServiceDMSERVER stop

./bin/dmrestore INI_PATH=/opt/dmdbms/data/DAMENG/dm.ini FILE=/test/duanbb/DM/backup/full.bak

/etc/init.d/DmServiceDMSERVER start

2) database increment backup/restore

  a) online backup

SQL>BACKUP DATABASE INCREMENT WITH BACKUPDIR '/test/duanbb/DM/backup/' TO inc1 BAKFILE '/test/duanbb/DM/backup/inc1.bak';

  b) restore to backup

00001. 

/etc/init.d/DmServiceDMSERVER stop

00002. 

00003. 

./bin/dmrestore INI_PATH=/opt/dmdbms/data/DAMENG/dm.ini FILE=/test/duanbb/DM/backup/inc1.bak

00004. 

00005. 

/etc/init.d/DmServiceDMSERVER start

00006. 

3) restore to assigned time point

/etc/init.d/DmServiceDMSERVER stop

./bin/dmrestore INI_PATH=/opt/dmdbms/data/DAMENG/dm.ini FILE=/test/duanbb/DM/backup/full_0816.bak TIME="2013-8-16 13:38:50" ARCHIVE_DIR=/opt/dmdbms/data/DAMENG/arch

/etc/init.d/DmServiceDMSERVER start

4) tablespace backup/restore

  a) full backup/restore

    backup:

SQL>BACKUP TABLESPACE duanbb FULL TO duanbb_full_bak BAKFILE '/test/duanbb/DM/backup/ts_duanbb_full.bak';

    restore:

00001. 

SQL>ALTER TABLESPACE duanbb OFFLINE;

00002. 

00003. 

SQL>RESTORE TABLESPACE duanbb FROM '/test/duanbb/DM/backup/ts_duanbb_full.bak';

00004. 

00005. 

SQL>ALTER TABLESPACE duanbb ONLINE;

00006. 

  b) increment backup/restore:

    backup:

SQL>BACKUP TABLESPACE duanbb INCREMENT WITH BACKUPDIR '/test/duanbb/DM/backup' TO duanbb_inc1 BAKFILE '/test/duanbb/DM/backup/ts_duanbb_inc1.bak';

    restore:

00001. 

SQL>ALTER TABLESPACE duanbb OFFLINE;

00002. 

00003. 

SQL>RESTORE TABLESPACE duanbb FROM '/test/duanbb/DM/backup/ts_duanbb_inc1.bak';

00004. 

00005. 

SQL>ALTER TABLESPACE duanbb ONLINE;

00006. 

5) parallel backup

  user 'DUANBB', tablespace: 'DUANBB'
  user 'DSG',    tablespace: 'DSG'
  a) create parallel backup configure file '/test/duanbb/DM/bak.parallel' as followed contents

[DUANBB]=/test/duanbb/DM/backup/duanbb

[DSG]=/test/duanbb/DM/backup/dsg

[default]=/test/duanbb/DM/backup

  b) backup

    full backup

SQL>BACKUP DATABASE FULL TO PARA_BAK_1 BAKFILE '/test/duanbb/DM/backup/parallel1.bak' PARALLEL '/test/duanbb/DM/bak.parallel';

    increment backup

SQL>BACKUP DATABASE INCREMENT WITH BACKUPDIR '/test/duanbb/DM/backup/' TO para_inc1 BAKFILE '/test/duanbb/DM/backup/para_inc1.bak';

  c) restore

/etc/init.d/DmServiceDMSERVER stop

 

./bin/dmrestore INI_PATH=/opt/dmdbms/data/DAMENG/dm.ini FILE=/test/duanbb/DM/backup/parallel1.bak

or

./bin/dmrestore INI_PATH=/opt/dmdbms/data/DAMENG/dm.ini FILE=/test/duanbb/DM/backup/parallel1.bak TIME="2013-8-19 11:28:00" ARCHIVE_DIR=/opt/dmdbms/data/DAMENG/arch

or

./bin/dmrestore INI_PATH=/opt/dmdbms/data/DAMENG/dm.ini FILE=/test/duanbb/DM/backup/parallel1.bak ARCHIVE_DIR=/opt/dmdbms/data/DAMENG/arch    

 

/etc/init.d/DmServiceDMSERVER start