DataGuard主备归档存在gap的处理办法

DataGuard主备之间可能由于网络等原因，造成备库和主库之间的归档日志不一致，这样就产生了gap。
解决gap的步骤：
1.在备库获得gap的详细信息
2.将需要的归档日志从主库拷贝到备库
3.备库将归档日志注册，然后应用。
 
--备库alert日志提示gap详情  
Media Recovery Waiting for thread 1 sequence 7057
Fetching gap sequence in thread 1, gap sequence 7057-7080
FAL[client]: Error fetching gap sequence, no FAL server specified
Mon Mar 24 11:39:40 CST 2014
FAL[client]: Failed to request gap sequence 
 GAP - thread 1 sequence 7057-7080
 DBID 768411208 branch 784810891
FAL[client]: All defined FAL servers have been attempted.

--也可以在备库查询gap
select * from v$archive_gap;

--为了方便，组装拷贝语句
--如果归档日志在ASM中，先通过rman将归档日志拷贝到OS，然后scp到备库standby归档目录；
--如果归档日志在OS上，直接scp到备库standby归档目录即可。
@Pirmary
select length(\'+DG1/primary/archivelog/2014_03_21/\') from dual;
LENGTH(\'+DG1/PRIMARY/ARCHIVELOG/2014_03_21/\')
---------------------------------------------
                                           35
  
--get copy command
select \'copy archivelog \'\'\'||NAME||\'\'\' to \'\'/tmp/\'||substr(name,35)||\'\'\' ;\' 
from v$archived_log 
where  SEQUENCE#>7060 
and SEQUENCE#<=7080 
and thread#=1 
and NAME<>\'standby service name\';

--copy archive logs from asm to OS
rman target /
copy archivelog \'+DG1/primary/archivelog/2014_03_21/thread_1_seq_7061.393.842805877\' to \'/tmp/thread_1_seq_7061.393.842805877\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_21/thread_1_seq_7062.472.842816319\' to \'/tmp/thread_1_seq_7062.472.842816319\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_21/thread_1_seq_7063.414.842825435\' to \'/tmp/thread_1_seq_7063.414.842825435\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7064.308.842843087\' to \'/tmp/thread_1_seq_7064.308.842843087\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7065.278.842847011\' to \'/tmp/thread_1_seq_7065.278.842847011\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7066.415.842847023\' to \'/tmp/thread_1_seq_7066.415.842847023\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7067.469.842850077\' to \'/tmp/thread_1_seq_7067.469.842850077\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7068.402.842864915\' to \'/tmp/thread_1_seq_7068.402.842864915\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7069.475.842868603\' to \'/tmp/thread_1_seq_7069.475.842868603\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7070.413.842869761\' to \'/tmp/thread_1_seq_7070.413.842869761\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7071.312.842871319\' to \'/tmp/thread_1_seq_7071.312.842871319\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7072.407.842874331\' to \'/tmp/thread_1_seq_7072.407.842874331\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7073.405.842874917\' to \'/tmp/thread_1_seq_7073.405.842874917\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7074.328.842875663\' to \'/tmp/thread_1_seq_7074.328.842875663\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7075.296.842876043\' to \'/tmp/thread_1_seq_7075.296.842876043\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7076.452.842886921\' to \'/tmp/thread_1_seq_7076.452.842886921\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_22/thread_1_seq_7077.446.842906131\' to \'/tmp/thread_1_seq_7077.446.842906131\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_23/thread_1_seq_7078.348.842928271\' to \'/tmp/thread_1_seq_7078.348.842928271\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_23/thread_1_seq_7079.347.842928277\' to \'/tmp/thread_1_seq_7079.347.842928277\' ;
copy archivelog \'+DG1/primary/archivelog/2014_03_23/thread_1_seq_7080.367.842929387\' to \'/tmp/thread_1_seq_7080.367.842929387\' ;


--send archive logs to standby
scp thread_1_seq_70* 10.1.1.10:/tmp

--get  standby register archivelog command
--同样在主库执行，获得注册语句
select \'ALTER DATABASE REGISTER PHYSICAL LOGFILE \'\'/tmp/\'||substr(name,35)||\'\'\';\' from v$archived_log where  SEQUENCE#>7060 and SEQUENCE#<=7080 and thread#=1 and NAME<>\'standby service name\';

ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7061.393.842805877\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7062.472.842816319\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7063.414.842825435\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7064.308.842843087\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7065.278.842847011\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7066.415.842847023\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7067.469.842850077\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7068.402.842864915\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7069.475.842868603\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7070.413.842869761\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7071.312.842871319\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7072.407.842874331\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7073.405.842874917\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7074.328.842875663\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7075.296.842876043\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7076.452.842886921\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7077.446.842906131\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7078.348.842928271\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7079.347.842928277\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7080.367.842929387\';



@Standby
--register gap archivelog to standby
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7061.393.842805877\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7062.472.842816319\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7063.414.842825435\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7064.308.842843087\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7065.278.842847011\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7066.415.842847023\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7067.469.842850077\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7068.402.842864915\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7069.475.842868603\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7070.413.842869761\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7071.312.842871319\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7072.407.842874331\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7073.405.842874917\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7074.328.842875663\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7075.296.842876043\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7076.452.842886921\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7077.446.842906131\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7078.348.842928271\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7079.347.842928277\';
ALTER DATABASE REGISTER PHYSICAL LOGFILE \'/tmp/thread_1_seq_7080.367.842929387\';

--if standby is real apply,then standby will AUTO Apply archivelog
--if not,please open real apply 
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;

--get real apply info
set linesize 200
col name for a70
alter session set nls_date_format=\'yyyy-mm-dd hh24:mi:ss\';
select  NAME,THREAD#,FIRST_TIME,sequence#,applied from v$archived_log order by  FIRST_TIME,THREAD#,sequence#,DEST_ID;

--you can see alert log ,it also show archivelog apply info
tail -f alert.log

--make sure no gap between Primary and Standby
SQL> select * from v$archive_gap;

--Clean
@Priamry
cd /tmp
rm thread_*

RMAN> crosscheck archivelog all;
RMAN> list archivelog all;
RMAN> delete expired archivelog all;
 
http://blog.chinaunix.net/uid-23284114-id-4190413.html