Flash Recover Area

Question

Hi,
I would to work with FLASH RECOVERY AREA in my 10204 instance.
I set the values of follwoing parameters :
- db_recovery_file_dest
- db_recovery_file_dest_size I executed the following command:
alter system switch logfile;
I found that the archive log is been written to two destinations:
The new FRA dest :
[/bcv/ora5/BCV/archivelog/2010_07_27]$ ll
total 116891
drwxr-x--- 3 oracle dba        96 Jul 27 17:47 ../
-rw-r----- 1 oracle dba 118061056 Jul 27 17:47 o1_mf_1_3_64xwcd6s_.arc
-rw-r----- 1 oracle dba   1635328 Jul 27 17:49 o1_mf_1_4_64xwhw57_.arcAnd the original destination as it was befor moving to FRA :
[/bcv/oraarch]$ ll
-rw-r-----  1 oracle dba    1635328 Jul 27 17:49 bzq1_1_0000000004_725398904.arcThe init.ora values regarding the archive log are as follow :
SYS@bcv> show parameter archive
NAME                                 TYPE        VALUE
archive_lag_target                   integer     0
log_archive_config                   string
log_archive_dest                     string      /bcv/oraarch/
log_archive_dest_1                   string
log_archive_dest_10                  string
log_archive_dest_state_1             string      enable
log_archive_dest_state_10            string      enable
log_archive_duplex_dest              string
log_archive_format                   string      bzq1_%t_%S_%r.arc
log_archive_local_first              boolean     TRUE
log_archive_max_processes            integer     2
log_archive_start                    boolean     FALSE
log_archive_trace                    integer     0
remote_archive_enable                string      true
standby_archive_dest                 string      ?/dbs/archQuestions :
1. Should i reset the value of log_archive_dest in order to write the archives only to the FRA location ?
2. I would like to keep the archive manes as it was before ' e.g: bzq1_%t_%S_%r.arc
and not o1_mf_1_4_64xwhw57_.arc is it possible ?
3. The controlfiles and redo logs still pointing to the old location. As per "best practices" should i move them to the new location ?
Thanks

Answer 1

>
Questions :
1. Should i reset the value of log_archive_dest in order to write the archives only to the FRA location ?That is a decision that needs to be made. The best practice is to determine what is best for your organization and configuration. A non-answer, but there you go. I've found FRA pretty handy, myself.
2. I would like to keep the archive manes as it was before ' e.g: bzq1_%t_%S_%r.arc
and not o1_mf_1_4_64xwhw57_.arc is it possible ?From http://download.oracle.com/docs/cd/B19306_01/backup.102/b14191/rcmconfg.htm#i1006338 :
"The generated filenames for the archived redo logs in the flash recovery area are Oracle Managed Filenames and are not determined by LOG_ARCHIVE_FORMAT."
So, "no."
3. The controlfiles and redo logs still pointing to the old location. As per "best practices" should i move them to the new location ?The redo logs are Oracle's Achille's heel. Lose them and you lose data. You need to make sure you do as much as you can to protect them. That includes having them in more than one location physically, not just different mount points on the same device. If you can.
Control files are important, you want to be sure they are redundant, backed up, and backed up to trace, and you know how to get them back.
Of course, your storage devices will constrain what you can physically do. The different read and write requirements of the different types of files may make some demands, too. If you have log writer or controlfile waits, you may be doing it wrong. If you have a conflict between writing the archives and everything else, users may complain.