Flashback Logs Location

Well, I am confused whether Oracle Flashback Technology uses Undo Tablespace or Flash Recovery Area. I was going through http://www.oracle.com/technology/deploy/availability/htdocs/Flashback_Overview.htm, and the page mentions both Undo Tablespace and Flash Recovery Area.
Can someone please clarify.
Thanks

furqan_sindhu wrote:
Well, I am confused whether Oracle Flashback Technology uses Undo Tablespace or Flash Recovery Area. Completely wrong thought process. Oracle Flashback Technology is based on the Undo data which is stored Undo Tablespace. The Flash Recovery Area is nothing but a destination where the Flashback Logs are stored but they are used for a different purpose, which is for sending the complete database back into the past. So comparing both Flashback and FRA is actually a wrong thing to do.
I was going through http://www.oracle.com/technology/deploy/availability/htdocs/Flashback_Overview.htm, and the page mentions both Undo >Tablespace and Flash Recovery Area.
Read my reply above. Flashback is based on the Undo data which is not stored in the FRA but in the Undo tablespace. The FRA is used to store the backup files, archive files and a sepcial set of files called flashback logs (which I mentioned above) . Don't compare both and a suggestion, don't read white papers since they contain snippets of information only. Read oracle docs since they contain the complete stuff.
HTH
Aman....

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Lonion wrote:
hi, all . why the flashback log'size smaller than the archived log ?Both are different.
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<smacking forehead on the table>
Bloody hell! How the heck I missed that darn "B" ? I guess, time to get some sleep and after that some coffee.Please don't do ;-)
When knowledge is in extreme level, there is possibilities to miss small and small things some time.
@OP,
Here some practice
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NAME                                 TYPE        VALUE
db_recovery_file_dest                string      C:\Oracle\flash_recovery_area
db_recovery_file_dest_size           big integer 3852M
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alter system set db_recovery_file_dest_size=4gb scope=both
ERROR at line 1:
ORA-02065: illegal option for ALTER SYSTEM
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sys@ORCL> alter system set db_recovery_file_dest_size=4g scope=both;
System altered.
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db_recovery_file_dest                string      C:\Oracle\flash_recovery_area
db_recovery_file_dest_size           big integer 4G
sys@ORCL>

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>
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>
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