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主题： 从磁带恢复归档出现ORA-19870错误 [转帖]

wayne

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2011-9-15 9:42:08 | [全部帖] [楼主帖]

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从磁带中直接恢复归档日志时，出现了这个错误信息。

归档日志前后备份了两次，一次是在备份数据库后做的，另一次是凌晨7点左右进行的，其中第二次备份包含的归档日志比第一次多，最近的归档日志文件备份信息如下：

BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ -------------------
37761 3.18G SBT_TAPE 00:01:22 2011-08-27 03:22:37
BP Key: 37761 Status: AVAILABLE Compressed: NO Tag: TAG20110827T032114
Handle: al_43199_1_760245675 Media:
List of Archived Logs in backup set 37761
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- ------------------- ---------- ---------
1 132214 10200825285755 2011-08-27 00:35:39 10200825450980 2011-08-27 00:40:04
1 132215 10200825450980 2011-08-27 00:40:04 10200825451525 2011-08-27 00:40:06
1 132216 10200825451525 2011-08-27 00:40:06 10200826640012 2011-08-27 01:05:42
1 132217 10200826640012 2011-08-27 01:05:42 10200828085370 2011-08-27 02:08:11
1 132218 10200828085370 2011-08-27 02:08:11 10200831622590 2011-08-27 03:05:09
1 132219 10200831622590 2011-08-27 03:05:09 10200831803462 2011-08-27 03:21:02
1 132220 10200831803462 2011-08-27 03:21:02 10200831803603 2011-08-27 03:21:12
BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ -------------------
37763 4.22G SBT_TAPE 00:06:40 2011-08-27 07:12:26
BP Key: 37763 Status: AVAILABLE Compressed: NO Tag: TAG20110827T070545
Handle: al_43201_1_760259146 Media:
List of Archived Logs in backup set 37763
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- ------------------- ---------- ---------
1 132214 10200825285755 2011-08-27 00:35:39 10200825450980 2011-08-27 00:40:04
1 132215 10200825450980 2011-08-27 00:40:04 10200825451525 2011-08-27 00:40:06
1 132216 10200825451525 2011-08-27 00:40:06 10200826640012 2011-08-27 01:05:42
1 132217 10200826640012 2011-08-27 01:05:42 10200828085370 2011-08-27 02:08:11
1 132218 10200828085370 2011-08-27 02:08:11 10200831622590 2011-08-27 03:05:09
1 132219 10200831622590 2011-08-27 03:05:09 10200831803462 2011-08-27 03:21:02
1 132220 10200831803462 2011-08-27 03:21:02 10200831803603 2011-08-27 03:21:12
1 132221 10200831803603 2011-08-27 03:21:12 10200839298501 2011-08-27 05:59:17
1 132222 10200839298501 2011-08-27 05:59:17 10200851993798 2011-08-27 07:05:40
1 132223 10200851993798 2011-08-27 07:05:40 10200851993847 2011-08-27 07:05:44

而且这两个备份并不在同一个磁带中，前面的一份归档备份和全库备份同处于一个磁带中，因此在恢复的过程中，直接将这盘磁带取出，在另一台服务器上进行恢复。

全库的还原没有碰到问题，但是恢复归档日志则碰到了下面的错误：

RMAN> run
2> {
      3> ALLOCATE CHANNEL ch00 TYPE 'SBT_TAPE';
      4> SEND 'NB_ORA_SERV=nbusrv, NB_ORA_CLIENT=ccicdbsrv5';
      5> restore archivelog from sequence 132214 until sequence 132220;
      6> RELEASE CHANNEL ch00;
7> }
allocated channel: ch00
channel ch00: sid=1630 devtype=SBT_TAPE
channel ch00: Veritas NetBackup for Oracle - Release 6.5 (2007072323)
sent command to channel: ch00
Starting restore at 2011-09-11 21:03:48
channel ch00: starting archive log restore to default destination
channel ch00: restoring archive log
archive log thread=1 sequence=132214
channel ch00: restoring archive log
archive log thread=1 sequence=132215
channel ch00: restoring archive log
archive log thread=1 sequence=132216
channel ch00: restoring archive log
archive log thread=1 sequence=132217
channel ch00: restoring archive log
archive log thread=1 sequence=132218
channel ch00: restoring archive log
archive log thread=1 sequence=132219
channel ch00: restoring archive log
archive log thread=1 sequence=132220
channel ch00: reading from backup piece al_43201_1_760259146
ORA-19870: error reading backup piece al_43201_1_760259146
ORA-19507: failed to retrieve sequential file, handle="al_43201_1_760259146", parms=""
ORA-27029: skgfrtrv: sbtrestore returned error
ORA-19511: Error received from media manager layer, error text:
Failed to open backup file for restore.
failover to previous backup
channel ch00: starting archive log restore to default destination
channel ch00: restoring archive log
archive log thread=1 sequence=132214
channel ch00: restoring archive log
archive log thread=1 sequence=132215
channel ch00: restoring archive log
archive log thread=1 sequence=132216
channel ch00: restoring archive log
archive log thread=1 sequence=132217
channel ch00: restoring archive log
archive log thread=1 sequence=132218
channel ch00: restoring archive log
archive log thread=1 sequence=132219
channel ch00: restoring archive log
archive log thread=1 sequence=132220
channel ch00: reading from backup piece al_43199_1_760245675
ORA-19870: error reading backup piece al_43199_1_760245675
ORA-19507: failed to retrieve sequential file, handle="al_43199_1_760245675", parms=""
ORA-27029: skgfrtrv: sbtrestore returned error
ORA-19511: Error received from media manager layer, error text:
Failed to process backup file< al_43199_1_760245675>
failover to previous backup
released channel: ch00
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 09/11/2011 21:04:30
RMAN-06026: some targets not found - aborting restore
RMAN-06025: no backup of log thread 1 seq 132220 lowscn 10200831803462 found to restore
RMAN-06025: no backup of log thread 1 seq 132219 lowscn 10200831622590 found to restore
RMAN-06025: no backup of log thread 1 seq 132218 lowscn 10200828085370 found to restore
RMAN-06025: no backup of log thread 1 seq 132217 lowscn 10200826640012 found to restore
RMAN-06025: no backup of log thread 1 seq 132216 lowscn 10200825451525 found to restore
RMAN-06025: no backup of log thread 1 seq 132215 lowscn 10200825450980 found to restore
RMAN-06025: no backup of log thread 1 seq 132214 lowscn 10200825285755 found to restore

由于要恢复的归档日志在两个备份集中存在，因此RMAN尝试了两次进行恢复。第一次寻找al_43201_1_760259146文件，由于这个文件不在当前的磁带中，恢复失败是正常的，但是al_43199_1_760245675文件就存放在当前的磁带中，而仍然出现无法获取文件的错误就不正常了。

考虑到恢复环境和备份环境并不一致，备份时使用的带库而当前仅包含一个磁带，且磁带的catalog信息很可能也没有导入，因此对于源数据的查找可能存在问题。

通过CHANGE BACKUP TAG ‘TAG20110827T070545’ UNAVAILABLE的方式，避免恢复过程中去寻找目前并不存在的备份。再次使用RMAN执行同样的恢复操作，这次恢复成功。

恢复应该在和备份等同条件下进行，否则至少应该保证带库的CATALOG数据导入，否则就可能出现这种跨磁带查找文件时出现的错误，而利用RMAN直接在当前的磁带中扫描文件则不受影响。