fal 失败 无法读取丢失的日志
FAL[client]: Failed to request gap sequence
GAP - thread 1 sequence 8-9
DBID 4085976867 branch 830994121
FAL[client]: All defined FAL servers have been attempted.
-------------------------------------------------------------
Check that the CONTROL_FILE_RECORD_KEEP_TIME initialization
parameter is defined to a value that is sufficiently large
enough to maintain adequate log switch information to resolve
GAP - thread 1 sequence 8-9
DBID 4085976867 branch 830994121
FAL[client]: All defined FAL servers have been attempted.
-------------------------------------------------------------
Check that the CONTROL_FILE_RECORD_KEEP_TIME initialization
parameter is defined to a value that is sufficiently large
enough to maintain adequate log switch information to resolve
archivelog gaps.
备库因日志中断而不能继续进行介质恢复。我们的问题就是如何将这些日志文件找回来。
在主库中，判断归档日志状况。
select *from v$archived_log b where b.SEQUENCE#>=68042 and b.THREAD#=2 andb.SEQUENCE#<=68051 and b.DEST_ID=1 and b.DELETED='YES';
通过这个SQL，确认这些归档日志已经被删除了。
找出丢失的归档 可以 os copy或者rman 恢复
恢复单独归档
list backup of archivelog from sequence 8 until sequence 9 thread 1;
restore archivelog from sequence 13 until sequence 14 thread 2;