Flashback

I want to conform that
We dont require the database in archivelog mode if we are using flashback query and flashback table feature?
I know that we want database in archivelog mode while using flashback database. Is that because flashback database is same as applying incomplete recovery?
can someone explain

That is true, the database doesn't need to run in archive log mode in order for you to use flashback query and flashback table feature.
Flashback query and flashback table use UNDO data.
For more information read the documentation:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_9012.htm#sthref8923
Flashback database, from the other hand, is alternative to performing incomplete database recovery.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_9011.htm#i2143247
Message was edited by:
tekicora
typo
Message was edited by:
tekicora
flashback database answer

Similar Messages

HT5228 How to find out if your Mac has the Flashback Trojan EASY WAY!!!!

http://www.cnn.com/2012/04/06/tech/web/mac-flashback-trojan-check/index.html
Just did it works great and they also have a post on how to remove it as well.

Here is an even easier way, it will remove most infections too:
I have created a user tip and malware checker/removal tool: https://discussions.apple.com/docs/DOC-3271

Best practice on using Flashback and Logical Standby

Hello,
I'm testing a fail-back scenario where I first need to activate a logical standby, then do some dummy transactions before I flashback this db and resme the redo apply. Here is what the steps look like:
1)     Ensure logical standby is in-sync with primary
2)     Enable flashback on standby
3)     Create a flashback guaranteed restore point
4)     Defer log shipping from primary
5)     Activate the logical standby so it’s fully open to read-write
6)     Dummy activities against the standby (which is now fully open)
7)     Flashback the database to the guaranteed checkpoint
8)     Resume log shipping on primary
9)     Resume redo apply on secondary
In the end, i can see the log shipping is happening but the logical standby does not apply any of these..and there is no error in the alert log on Standby side. But the following query could explains why the standby is idle:
SELECT TYPE, HIGH_SCN, STATUS FROM V$LOGSTDBY;
TYPE HIGH_SCN STATUS
COORDINATOR ORA-16240: Waiting for log file (thread# 2, sequence# 0)
ORA-16240: Waiting for log file (thread# string, sequence# string)
Cause: Process is idle waiting for additional log file to be available.
Action: No action necessary. This informational statement is provided to record the event for diagnostic purposes.
I dont understand why it's looking for sequence #0 after the flashback.
Thanks for the help.

Hello;
I hesitate to answer your question because you are not doing a good job of keeping the forum clean :
Total Questions: 13 (13 unresolved)
Please consider closing some of you old answered questions and rewarding those who helped you.
No action necessary.
Do you really have a thread 2? ( Redo thread number )
Quick check
select applied_scn,latest_scn from v$logstdby_progress;Use the DBA_LOGSTDBY_LOG View if you don't have a thread 2 then the sequence# is meaningless.
COLUMN DICT_BEGIN FORMAT A10;
SELECT FILE_NAME, SEQUENCE#, FIRST_CHANGE#, NEXT_CHANGE#,
TIMESTAMP, DICT_BEGIN, DICT_END, THREAD# AS THR# FROM DBA_LOGSTDBY_LOG
ORDER BY SEQUENCE#;Logical Standby questions are difficult, not a lot of them out there I'm thinking.
Check
http://docs.oracle.com/cd/E14072_01/server.112/e10700/manage_ls.htm
"Waiting On Gap State" ( However I still believe you don't have a 2nd thread# )
OR
http://psilt.wordpress.com/2009/04/29/simple-logical-standby/
Best Regards
mseberg
Edited by: mseberg on Apr 26, 2012 5:13 PM

HELP! I had a Flashback Trojan/Malware on my Mac, I deleted it in trash, and now my Mac won't start.

At first my Mac Finder showed n81, n82, etc when you right-click it, instead of the commands " open new finder window", "hide" etc. I also noticed that sometimes, when I would go to sites such as facebook, it would redirect to a different site and I'd have to type in the address again to get to the site. Nothing else was wrong with it. Safari was not shutting down. It wasn't slow.
I did some research and found that I probably have the Flashback Trojan/Malware virus (whatever that is?) And so I followed what some people did (which got their mac fixed) .. I downloaded clamvax and tinkertool to find the malware (hidden files) and I deleted it in trash.. my computer seemed fine but when I restarted it, it wont turn on anymore.. the screen remains blue, the mouse could still be moved, but it stays that way..
did I lose all my files? am I being hacked as we speak? Is this virus very dangerous?! I am very paranoid and know nothing about this kind of stuff so please help!
BTW, the malware was from the game Farm Frenzy.. I have no idea how I got this... I never play online games.

@Thomas, Thanks for jumping in. I had to take my wife to a Doctor appointment and things went down hill from there.
I note that you are using Mac OS X 10.5.x. It's important to understand that the Java vulnerabilities that allowed this malware to get established on your machine cannot be fixed in 10.5.x. You would need to upgrade to at least 10.6 (Snow Leopard) to be able to get a version of Java with those vulnerabilities fixed. (Correct me if I'm wrong there, Al!)
That's 100% correct. Natalia has the distinction of being the first OS X 10.5 user confirmed to be infected by Flashback as far as I can tell. That operating system is becoming increasingly dangerous as the days go by. The OS has not been updated since Aug 2009 and the last Security and Java updates were in June 2011. There is no XProtect system and more and more third party's have dropped support in updating their Applications.
Natalia_ wrote:
I actually ran disk utility, and it said that the Macintosh HD is fine... I also tried safe mode/safe boot and did the FSCK command.. even that said that my laptop was fine? but somehow it still stays blue when I start up!
And I think it probably is fine, except that something is hanging during the initial loading process. Could be most anything.
As for my files, I appreciate your advice but I am scared I might do something wrong and mess my laptop up even more!
There is almost no chance of that and at this point it should be obvious to you that if the files on your laptop are that important, you should already have a backup.
I will take it to Apple and hopefully they can help me... because it seems that my files aren't wiped out... yet... It still displayed that I had my files in there..
One word of caution, then. I have been told that Apple has instructed their support folks not to attempt to clean up a malware infection. If I were you I wouldn't bring it up unless you have to.
By the way, while the disk was running, it was making very loud noises.. humming/grinding/etc... what could this mean?
Only one thing in my experience, you're hard drive is toast. All the more reason to try and get all the data you can off it immediately.
The only way to test it is to do a surface scan which Disk Utility cannot do. You would need a third party utility to do that. If it tells you there are bad sectors, that is 100% proof that it's going bad, as modern hard drives repair themselves of bad sectors until they run out of reserves to substitute.

I have os 10.5.8 and safari 5.0.6 and websites are coming very strange. Do I have flashback virus? When I use firefox they come up normal. what can I do?

I guess I put all info at top, sorry. Websites are displaying strange. When I use firefox they come up normal. Do I have flashback virus? what do I do to correct problem.

Thank you both for responding . After my posting I kept digging, I now know I don't have flashback. But, as to the strange part the pdf will show. Before problem that started about 2 weeks ago. The content was spread across the web page now it's all to the left going straight down. Also each action I get a slow script message and action is only completed when I hit cancel.
file:///Users/daniellacevedojr/Desktop/What%20is%20eMusic.pdf
I hope this gives you more insight.
Thank you for your attention.

Are Power PC based Macs open to infection by Flashback? And if so how do I find out if it's on my G4?

Are Power PC Macs open to infection by Flashback? And If so, how do I check to see whether my G4 has been a victim? All the scanners that I've seen are for Intel based Macs only.

I would run Terminal, then COPY the command shown in Step 2 (from the web site link). PASTE it in Terminal (to ensure you don't mistype something) and hit Return. If you do NOT get "... does not exist" message, don't do the anything else in the procedure.
If you DO get the "... does not exist" message, then COPY the command shown in Step 8. PASTE it in Terminal and hit Return. If you do NOT get "... does not exist" message, don't do the anything else in the procedure.
If you DO get the "... does not exist" message, then your Mac is clean.
The commands in Steps 2 and 8 can do no harm, because nothing is being changed. Some of the other commands for "removal" in the procedure do make changes. So if Steps 2 and 8 indicate your Mac is clean, that's good and you're done.
If they indicate otherwise, there may be a problem. You can ask additional questions here about what to do.
FYI - I just ran the procedure on my Power Mac G5 running Leopard, and I got the expected "... does not exist" messages after entering the commands in Steps 2 and 8.

I have an iMac running OS 10.4.11. How can I check to see if I have the Flashback Trojan (and remove it, if I have it)? IMy Safari is also crashing frequently. Any suggestions?

I have an iMac running OS 10.4.11. How can I check to see if I have the Flashback Trojan (and remove it, if I have it)? IMy Safari is also crashing frequently. Any suggestions?

Hi Barry, is this an Intel iMac, or a PPC iMac?
Disable Java in your Browser settings, not JavaScript.
http://support.apple.com/kb/HT5241?viewlocale=en_US
http://support.google.com/chrome/bin/answer.py?hl=en-GB&answer=142064
http://support.mozilla.org/en-US/kb/How%20to%20turn%20off%20Java%20applets
Flashback - Detect and remove the uprising Mac OS X Trojan...
http://www.mac-and-i.net/2012/04/flashback-detect-and-remove-uprising.html
In order to avoid detection, the installer will first look for the presence of some antivirus tools and other utilities that might be present on a power user's system, which according to F-Secure include the following:
/Library/Little Snitch
/Developer/Applications/Xcode.app/Contents/MacOS/Xcode
/Applications/VirusBarrier X6.app
/Applications/iAntiVirus/iAntiVirus.app
/Applications/avast!.app
/Applications/ClamXav.app
/Applications/HTTPScoop.app
/Applications/Packet Peeper.app
If these tools are found, then the malware deletes itself in an attempt to prevent detection by those who have the means and capability to do so. Many malware programs use this behavior, as was seen in others such as the Tsunami malware bot.
http://reviews.cnet.com/8301-13727_7-57410096-263/how-to-remove-the-flashback-ma lware-from-os-x/
http://x704.net/bbs/viewtopic.php?f=8&t=5844&p=70660#p70660
The most current flashback removal instructions are F-Secure's Trojan-Downloader:OSX/Flashback.K.
https://www.securelist.com/en/blog/208193454/Flashfake_Removal_Tool_and_online_c hecking_site
More bad news...
https://www.securelist.com/en/blog/208193467/SabPub_Mac_OS_X_Backdoor_Java_Explo its_Targeted_Attacks_and_Possible_APT_link
Removal for 10.5...
http://support.apple.com/kb/DL1534

Initial load of small target tables via flashback query?

A simple question.
Scenario: I’m currently building a near real time warehouse, streaming some basic facts and dimension tables between two databases. I’m considering building a simple package to "reset" or reinitialize the dimensions an all-round fix for variety of problem scenarios (since they are really small, like 15 000 rows each). The first time I loaded the target tables I utilized data pump with good success, however since streams transforms data on the way a complete reload is somewhat more complex.
Considered solution: Ill just write a nice flashback query via db-link fetching data from a specific (recent) SCN and then I reinitialize the table on that SCN in streams...
Is this a good idea? Or is there something obvious like a green and yellow elephant in the gift shop that I overlooked? Why I’m at all worried is because in the manuals this solution is not mention among the supported ways to do the initial load of a target table and I’m thinking there is a reason for this?

I have a series of streams with some tranformations feeding rather small dimensional tables, I want to make this solution easy to manage even when operations encounter difficult replication issues, so Im developing a PL/SQL package that will:
1) Stop all streams
2) Clear all errors
3) Truncate target tables
4) Reload them including transformation (using a SELECT AS OF "ANY RECENT SCN" from target to source over dblink)
5) Using this random recent SCN I will re-instantiate the tables
6) Start all streams
As you see datapump even if it works is rather difficult to utilize when you tranform data from A to B, using AS OF I not only get a constant snapshot from the source, I also get the exact SCN for it.
What do you think? Can I safely use SELECT AS OF SCN instead of datapump with SCN and still get a consisten sollution?
For the bigger FACT tables im thinking about using the same SELECT AS OF SCN but there with particular recent paritions as targets only and thus not having to reload the whole table.
Anyways this package would ensure operations that they can recover from any kind of disaster or incomplete recovery on both source and target databases, and just re-instantiate the warehouse within minutes.

I broke Safari trying to get rid of Flashback malware. How do I fix it?

I foolishly tried following the instructions on the CNET site for finding if I have the Flashback malware and supposedly fixing it:
http://reviews.cnet.com/8301-13727_7-57410096-263/how-to-remove-the-flashback-ma lware-from-os-x/?tag=mncol;txt
On the page, it says to run this command in Terminal and that if it returns a path result that you have the malware:
defaults read /Applications/Safari.app/Contents/Info LSEnvironment
When I ran the above, it gave me the following:
"DYLD_INSERT_LIBRARIES" = "/Applications/safari.app/contents/resources/.PassmarkMonitorTestV.xsl"
Based on the instructions on the CNET site, I believed that this file was infected and I deleted it, even though it was a hidden file. I followed the rest of the instructions on the page as well, which would supposedly "reset" the infected application, but this didn't work.
I now can't run Safari, It would apear that the file deleted was necessary for it to run.
I tried downloading Safari from the apple.com website so that I can reinstall it, but when I ran the installer, it said I couldn't use it because there was a newer version already on my machine.
I'm running Mac OS X Snow Leopard. I'm not sure what version of Safari I'm running (I can't open Safari) but it must be higher than the version on Apple's site, which is 5.1.4.
Here is the Safari error report:
Process:
Safari [516]
Path:
/Applications/Safari.app/Contents/MacOS/Safari
Identifier:
com.apple.Safari
Version:
Build Info:
WebBrowser-75345503~2
Code Type:
X86-64 (Native)
Parent Process: launchd [98]
Date/Time:
2012-04-05 21:14:59.436 -0400
OS Version:
Mac OS X 10.6.8 (10K549)
Report Version: 6
Interval Since Last Report:
2686299 sec
Crashes Since Last Report:
13
Per-App Crashes Since Last Report:   7
Anonymous UUID:
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 0
Dyld Error Message:
could not load inserted library: /Applications/Safari.app/Contents/Resources/.PassmarkMonitorTestV.xsl
Binary Images:
0x7fff5fc00000 -
0x7fff5fc3be0f dyld 132.1 (???) <29DECB19-0193-2575-D838-CF743F0400B2> /usr/lib/dyld
How can I repair my Safari installation?
<Edited By Host>

If you’re certain you know when the infection happened, and you back up with Time Machine or something similar, you can save yourself a lot of time by restoring your whole system from the most recent snapshot taken before it was infected. Then take Steps 7, 8, and 10 below.
How can you tell when the infection took place? All you can be sure of is that you were infected some time before the problems started. You may have visited a blog that prompted you to install some kind of software, or a “certificate.” If you remember doing that recently, mention it in a reply, but don’t post a link.
If you don’t know when you were infected, there's no easy, reliable way to remove the malware, because it's constantly changing. There are differences of opinion on this site as to the best of course of action, so you should do your own research before deciding how to proceed.
I suggest you take the following steps:
1. Back up all data to at least two different devices, if you haven't already done so.
2. Boot from your recovery partition (if running Mac OS X 10.7 or later) or your installation disc (if running an earlier version of the Mac OS), launch Disk Utility, and erase the startup volume. This action will destroy all data on the volume, so you must be sure of your backups.
3. Install the Mac OS.
4. Reboot and go through the initial setup process to create an account with the same name as your old one. Don’t import anything from your backups at this stage.
5. If running Mac OS X 10.6.x or earlier, run Software Update. You may have to run it more than once to fully update your system.
6. Restore the contents of the top-level subfolders of your home folder except “Library” from the most recent backup. The Library folder may contain components of the malware. It’s best not to restore anything from there. If you must do so, restore only files, not whole folders with all their contents, and only if (a) they’re visible in the Finder, and (b) you know what they are, and (c) they haven’t been altered. Don’t restore anything in the home subfolder Library/LaunchAgents, if it exists, or any hidden files or folders, no matter where they are.
7. If you’re running Mac OS X 10.5.8 or earlier, launch Safari and select Safari ▹ Preferences… ▹ Security from the menu bar. Uncheck the box labeled Enable Java. Because of known bugs, Java in those OS versions is unsafe to use on the Internet. (Note: I’m not referring to JavaScript, which is unrelated to Java, despite the similar names.) If you’re running Mac OS 10.6.8 or later, you should still disable the Java web plugin unless you really need it. Few websites have legitimate Java content nowadays. If you encounter one that does, enable Java temporarily.
8. Change every Internet password you have, starting with banking passwords. Check all financial accounts for unauthorized transactions. Take this step only after you’ve secured your system in the preceding steps, not before.
9. Reinstall your third-party software from fresh downloads or original media, not from backups which may be contaminated.
10. If you use any third-party web browsers, disable Java in their preferences. As with step 7, this step is mandatory if you’re running any version of Mac OS X older than 10.6. Otherwise it’s optional, but recommended.

(V9I) ORACLE 9I NEW FEATURE : ORACLE FLASHBACK

제품 : ORACLE SERVER
작성날짜 : 2002-11-01
(V9I) ORACLE 9I New Feature : ORACLE FLASHBACK
==============================================
PURPOSE
Oracle9i 새로운 기능인 Flashback 의 등장으로 Commit 된 Transaction 에 대해
특정 시점의 과거 DATA를 Query가 가능함으로써 Self-service repair 기능이 향상되었다.
다음 Flashback query 기능과 Setup 방법 및 실제 Data Recovery 에 관한 내용에 대해 알아보도록 한다.
Explanation
Flashback : 새로운 기능인 Flahback 은 과거 시점의 consistent view 를 볼 수있는
기능으로 system time or systme change number(SCN) 기반 read-only view이다.
다음은 Flashback 기능을 사용하기 위해 미리 설정해야할 부분에 대해 알아보도록 한다.
1) 반드시 Automatic Undo Management 에서만 가능
(initSID.ora file이나 spfile에 다음 파라미터가 auto로 설정)
UNDO_MANAGEMENT = AUTO
2) Rentention interval 을 두어 해당 time 동안은 inactive rollback 이라 하더라도
overwrite 되지 않도록 유지(초단위)
SQL> ALTER SYSTEM SET undo_retention = 1200;
UNDO_RETENTION 을 지정한 다음 실제 적용을 위해 5분정도 기다려야 한다.
3) DBMS_FLASHBACK package를 이용하여 Flashback 기능을 enable 시킨다.
SQL> call dbms_flashback.enable_at_time('9-NOV-01:11:00:00');
Example1. Flashback setup 과 date/time 설정
1) Undo tablespace 생성
SQL> create undo tablespace UNDOTBS datafile
'/database/901/V901/undotbs01.dbf' size 100M;
2) intiSID or spfile 에 다음 파라미터 적용
undo_management=auto
undo_retention=1200
undo_tablespace=UNDOTBS
3) dbms_flashback exeucte 권한 grant
SQL> connect / as sysdba
Connected.
SQL> grant execute on dbms_flashback to testuser;
Grant succeeded.
4) test table 생성
SQL> connect testuser/testuser;
Connected.
SQL> create table emp_flash as select * from scott.emp;
Table created.
SQL> select count(*) from emp_flash;
COUNT(*)
15
5) table 생성후 5분 정도 waiting -> table delete
SQL> delete from emp_flash;
15 rows deleted.
SQL> commit;
Commit complete.
SQL> select count(*) from emp_flash;
COUNT(*)
0
6) flashback 활성화
SQL> execute DBMS_FLASHBACK.ENABLE_AT_TIME(sysdate - 5/1440);
PL/SQL procedure successfully completed.
SQL> select count(*) from emp_flash;
COUNT(*)
15
SQL> execute DBMS_FLASHBACK.DISABLE;
PL/SQL procedure successfully completed.
SQL> select count(*) from emp_flash;
COUNT(*)
0
Example2. Flashback 으로 잃어버린 data recovery
1) test user 생성
SQL> connect testuser/testuser;
Connected.
SQL> create table emp_recover as select * from scott.emp;
Table created.
SQL> select count(*) from emp_recover;
COUNT(*)
15
2) delete table
SQL> VARIABLE SCN_SAVE NUMBER;
SQL> EXECUTE :SCN_SAVE := DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER;
PL/SQL procedure successfully completed.
SQL> PRINT SCN_SAVE
SCN_SAVE
6.4455E+12
SQL> select count(*) from emp_recover;
COUNT(*)
15
SQL> delete from emp_recover;
15 rows deleted.
SQL> commit;
Commit complete.
SQL> select count(*) from emp_recover;
COUNT(*)
0
3) flashback 이용한 data recover
SQL> DECLARE
2 CURSOR FLASH_RECOVER IS
3 select * from emp_recover;
4 emp_recover_rec emp_recover%ROWTYPE;
5 begin
6 DBMS_FLASHBACK.ENABLE_AT_SYSTEM_CHANGE_NUMBER(:SCN_SAVE);
7 open FLASH_RECOVER;
8 DBMS_FLASHBACK.DISABLE;
9 loop
10 FETCH FLASH_RECOVER INTO emp_recover_rec;
11 EXIT WHEN FLASH_RECOVER%NOTFOUND;
12 insert into emp_recover
13 values
14 (emp_recover_rec.empno,
15 emp_recover_rec.ename,
16 emp_recover_rec.job,
17 emp_recover_rec.mgr,
18 emp_recover_rec.hiredate,
19 emp_recover_rec.sal,
20 emp_recover_rec.comm,
21 emp_recover_rec.deptno);
22 end loop;
23 CLOSE FLASH_RECOVER;
24 commit;
25 end;
26 /
PL/SQL procedure successfully completed.
SQL> select count(*) from emp_recover;
COUNT(*)
15
Reference Document
Note. 174425.1
Note. 143217.1
Note. 179851.1

I 'm sorry I can not offer the correct figure since I'm an easy-to-forget guy.
Below is extracted from other's post. wish it helps.
Oracle Security Server ---> 2 questions
High Availability Technology ---> 4 questions
LogMiner Enhancements -> 1 question
Backup & Recovery Enhancements ---> 3 questions
Data Guard ---> 3 questions
Resource Manager Enhancements ---> 2 questions
Online Operations Enhancements ---> 3 questions
Segment Management (Part I) ---> 4 questions
Segment Management (Part II) ---> 3 questions
Performance Improvements ---> 4 questions
Scalable Session Management ---> 2 questions
Real Application Clusters ---> 2 questions
File Management ---> 4 questions
Tablespace Management ---> 4 questions
Memory Management ---> 3 questions
Enterprise Manager Enhancements ---> 2 questions
by the way, I just found an enthusiast (roxylo
) posted a book about the 9i new features. It surely will help

Fast Start Failover has broken my Logical Standby and Flashback has not helped

I have a primary ( PRIMARYP ), a physical standby ( STANDBYP ) and a logical standby ( STANDBYL ).
I configured Fast Start Failover ( with STANDBYP as the target ) and started an Observer. I did a shutdown abort on my primary and the Fast Start Failover did make STANDBYP the primary. I was able to reinstate PRIMARYP as a physical standby.
However when I checked my broker config it gave for STANDBYL
ORA-16795: the standby database needs to be recreated
Strange I though, since I would have expected STANDBYL to survive ok given that the new primary, STANDBYP was a physical standby of PRIMARYP.
Not to worry I thought, I simply will flashback STANDBYL to the beginning of the day and SQL APPLY will reapply all the redo.
This is where the problem begins
I mount STANDBYL
RMAN> connect target /
connected to target database: STANDBYL (DBID=440422466, not open)
RMAN> flashback database to time "TO_DATE('05/12/13 09:30:00','DD-MM-YY HH24:MI:SS')";
Starting flashback at 05-DEC-13
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=11 device type=DISK
starting media recovery
archived log for thread 1 with sequence 24 is already on disk as file /home/app/oracle/fast_recovery_area/STANDBYL/archivelog/2013_12_04/o1_mf_1_24_99yqwog0_.arc
archived log for thread 1 with sequence 25 is already on disk as file /home/app/oracle/fast_recovery_area/STANDBYL/archivelog/2013_12_05/o1_mf_1_25_9b0mlyvr_.arc
media recovery complete, elapsed time: 00:00:04
Finished flashback at 05-DEC-13
RMAN> quit
Recovery Manager complete.
oraclel[STANDBYL]>dgmgrl
DGMGRL for Linux: Version 11.2.0.3.0 - Production
Copyright (c) 2000, 2009, Oracle. All rights reserved.
Welcome to DGMGRL, type "help" for information.
DGMGRL> connect sys/manager
Connected.
DGMGRL> shutdown;
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
DGMGRL>
DGMGRL>
DGMGRL> startup;
ORACLE instance started.
Database mounted.
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
ORA-01589 - that a nasty surprise ! I didn't think I would need to do anything with the log sequences after a flashback
Any ideas of what is going on ?
thanks,
Jim

Hello;
This pdf might meet your needs :
http://blogs.oracle.com/AlejandroVargas/resource/DATAGUARD-FSFO-IMPLEMENTATION.pdf
Additional info :
http://oracle-tech.blogspot.com/2008/08/fast-start-failover-it-is-reliable.html
http://jakub.wartak.pl/blog/?p=80
http://www.databasejournal.com/features/oracle/article.php/3849106/Fast-Start-Failover-in-Oracle-11g-Data-Guard.htm
Best Regards
mseberg

Cannot use Flashback Versions Query in Oracle 10g

If I want use Flashback Versions Query for one Table in my Database 10.1.0.4 then I receive follow error message:
500 Internal Server Error
java.lang.RuntimeException: options is null
     at oracle.sysman.emSDK.jsp.ListBean.applyAttributes(ListBean.java:70)
     at oracle.sysman.emSDK.jsp.ShuttleBean.render(ShuttleBean.java:41)
     at oracle.cabo.ui.BaseUINode.render(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderChild(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderIndexedChild(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderIndexedChild(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderContent(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.render(Unknown Source)
     at oracle.cabo.ui.laf.xhtml.XhtmlLafRenderer.render(Unknown Source)
     at oracle.cabo.ui.BaseUINode.render(Unknown Source)
     at oracle.cabo.ui.BaseUINode.render(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderChild(Unknown Source)
     at oracle.cabo.ui.laf.xhtml.RowLayoutRenderer.renderChild(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderIndexedChild(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderIndexedChild(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderContent(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.render(Unknown Source)
     at oracle.cabo.ui.laf.xhtml.XhtmlLafRenderer.render(Unknown Source)
     at oracle.cabo.ui.BaseUINode.render(Unknown Source)
     at oracle.cabo.ui.BaseUINode.render(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderChild(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderIndexedChild(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderIndexedChild(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.renderContent(Unknown Source)
     at oracle.cabo.ui.BaseRenderer.render(Unknown Source)
.... and so on
Can any of you help me?

At what stage did you get this error?. Have you already selected the type of Flash Back Versions Query you want e.g Specifying type of Point in Time (Row Evaluation, Timestamp or SCN) or just when you select from the Action?

Replace Materialized View with Flashback?

I'm building a Data Warehouse with the following:
1. Tables populated throughout the day using CDC from the Application DB
2. MVs on those tables to keep a daily snapshot of the tables for reporting.
3. End users access the data through views with VPD applied, on the MVs
My systems team would like the solution to use as little storage as possible and currently I effectively have a copy of the app DB in the DW tables and would need another copy in the Daily MVs. (It is an insurance DB, so it is complex with lots of data, > 1.5 TB)
One way to reduce the storage could be to use flashback to keep a static daily version of the tables, so
At midnight I'd recreate the views like:
CREATE OR REPLACE VIEW client
AS SELECT *
FROM client_tab
AS OF TIMESTAMP (TO_TIMESTAMP(TRUNC(SYSDATE)));This would replace my refresh MV script. The end users would then refer to the client view in their reports
We would obviously need enough undo to store a days worth of data to ensure the flashback views remain consistent, but this is much less than the space required for a full copy. On a busy day there would be about 1% data change.
No DDL will occur on the tables during the day
Is there anything else I should be aware of? Can you let me know if (and why) this would not be a good idea?
This will run on Oracle 11.2.0.1
Thanks,
Ben

I guess I'm having some trouble visualizing the basic data model...
In most data warehouses that I've seen in the financial industry, reporting the position/ balance/ etc. at a given date involves scanning a single daily partition of each fact table involved and then hitting dimension tables that may or may not be partitioned (slowly changing dimensions would often have effective and expiration date columns to store the range of time a row was valid for, for example). Year-over-year reporting, then, just has to scan two fact table partitions-- the one for today and the one for a year ago. You may not store every intermediate change if there are potentially hundreds of transactions per account per day, but you'd generally put the end state for a given day in a single partition.
In one of your updates, it sounded like the 1.5 TB of data was just for the data that constituted end-of-day yesterday plus the 1% of changes made today which would imply that there was at least 15 GB of UNDO generated every day that would need to be applied to make flashback query work. That quantity of UNDO would make me pretty concerned from a performance perspective.
I would also tend to wager that VPD policies applied to views that are doing flashback query would be problematic. I haven't tried it and haven't really worked through all the testing scenarios in my mind, but I would be somewhat surprised if that didn't introduce some sort of hurdle that you'd have to work through/ work around.
Justin

Flashback and transaction query very slow

Hello. I was wondering if anyone else has seen transaction queries be really slow and if there is anything I can do to speed it up? Here is my situation:
I have a database with about 50 tables. We need to allow the user to go back to a point in time and "undo" what they have done. I can't use flashback table because multiple users can be making changes to the same table (different records) and I can't undo what the other users have done. So I must use the finer granularity of undoing each transaction.
I have not had a problem with the queries, etc. I basically get a cursor to all the transactions in each of the tables and order them backwards (since all the business rules must be observed). However, getting this cursor takes forever. From that cursor, I can execute the undo_sql. In fact, I once had a cursor that did "union all" on each table and even if the user only modified 1 table, it took way too long. So now I do a quick count based on the ROWSCN (running 10g and tables have ROWDEPENDANCIES) being in the time needed to find out if this table has been touched. Based on that, I can create a cursor only for the tables that have been touched. This helps. But it is still slow especially compared to any other query I have. And if the user did touch a lot of tables, it is still way too slow.
Here is an example of part of a query that is used on each table:
select xid, commit_scn, logon_user, undo_change#, operation, table_name, undo_sql
from flashback_transaction_query
where operation IN ('INSERT', 'UPDATE', 'DELETE')
and xid IN (select versions_xid
              from TABLE1
              versions between SCN p_scn and current_scn
              where system_id = p_system_id)
and table_name = UPPER('TABLE1')Any help is greatly appreciated.
-Carmine

Anyone?
Thanks,
-Carmine

Use of Flashback Database in Data guard environments

11.2.0.3/RHEL 5.8
I've come across several docs which talk about configuring FLASHBACK DATABASE in dataguard environments. We have several
Physical standby DBs (Single Instance & RAC) running in our shop.I would like to know two or three major(common) use of FLASHBACK DATABASE in data guard environments.
I understood one use mentioned in the below URL ie. recovering from a logical mistake
http://uhesse.com/2010/08/06/using-flashback-in-a-data-guard-environment/
I would like to know what are the other major/common use of Flashback Database feauture in DataGuard environment

A couple of other uses:
1) You can use flashback to test your DR. So you can activate your standby. Test application/network connectivity and functionality on your DR site and when done revert this database back to a physical standby. You do however have to ensure that this is allowed in your environment. In some places I have worked this would be a big no no as there were zero data loss requirements. However some companies will allow this as long as the standby is back in place within a certain time period.
2) In the case that you have to do a failover for whatever reason, but then what was the primary site becomes available, you can flashback what was your primary to make it the standby rather than re-instatiating the database from scratch.
Eg. You have a power outage at your primary site so you perform a failover and your standby becomes the primary. Once what was your primary site is back online, you can convert your previous primary into a standby by doing a full back/restore (or whatever method you choose) to recreate your standby again. However you also have the option of using flashback on this database and then convert it into a standby as this would potentially be quicker than re-instantiating the standby.

Error in Flashback Query

while trying to execute flashback query i am getting an error
CREATE TABLE flashback_query_test (
id NUMBER(10)
desc flashback_query_test
SELECT current_scn, TO_CHAR(SYSTIMESTAMP, 'YYYY-MM-DD HH24:MI:SS') FROM v$database;
INSERT INTO flashback_query_test (id) VALUES (1)
COMMIT;
SELECT COUNT(*) FROM flashback_query_test
SQL> SELECT COUNT(*)
2 FROM
3 flashback_query_test
4 AS OF
5 TIMESTAMP TO_TIMESTAMP('2010-02-01 16:58:43', 'YYYY-MM-DD HH24:MI:SS');
flashback_query_test
ERROR at line 3:
ORA-01466: unable to read data - table definition has changed
pls help me out!................

The SCN to TIMESTAMP conversion only has a granularity of approximately 3 seconds if I remember correctly. So my guess is that you are getting this error because you are trying to flashback to the same time that the table was created putting you in that 3 second window of SCN to TIMESTAMP ambiguity.
You can see this ambiguity by using the SCN_TO_TIMESTAMP or TIMESTAMP_TO_SCN functions as shown below:
SQL> COLUMN TSTAMP NEW_VALUE T;
SQL> SELECT CURRENT_SCN, TO_CHAR(SYSTIMESTAMP,'YYYY-MM-DD HH24:MI:SS') AS TSTAMP FROM V$DATABASE;
         CURRENT_SCN TSTAMP
       9080346377361 2010-02-01 07:13:12
SQL> SELECT TIMESTAMP_TO_SCN(TO_TIMESTAMP('&T','YYYY-MM-DD HH24:MI:SS')) FROM DUAL;
old   1: SELECT TIMESTAMP_TO_SCN(TO_TIMESTAMP('&T','YYYY-MM-DD HH24:MI:SS')) FROM DUAL
new   1: SELECT TIMESTAMP_TO_SCN(TO_TIMESTAMP('2010-02-01 07:13:12','YYYY-MM-DD HH24:MI:SS')) FROM DUAL
TIMESTAMP_TO_SCN(TO_TIMESTAMP('2010-02-0107:13:12','YYYY-MM-DDHH24:MI:SS'))
                                                              9080346377360See how the SCNs are different?
Now if you allow some time to pass between table creation and INSERT, you should be able to get the results as shown:
SQL> CREATE TABLE FLASHBACK_QUERY_TEST(id NUMBER(10));
Table created.
SQL> EXEC DBMS_LOCK.SLEEP(3);
PL/SQL procedure successfully completed.
SQL> COLUMN TSTAMP NEW_VALUE T;
SQL> SELECT CURRENT_SCN, TO_CHAR(SYSTIMESTAMP,'YYYY-MM-DD HH24:MI:SS') AS TSTAMP FROM V$DATABASE;
         CURRENT_SCN TSTAMP
       9080346377430 2010-02-01 07:15:30
SQL> INSERT INTO FLASHBACK_QUERY_TEST(ID) VALUES(1);
1 row created.
SQL> COMMIT;
Commit complete.
SQL> SELECT COUNT(*) FROM FLASHBACK_QUERY_TEST;
            COUNT(*)
                   1
SQL> SELECT COUNT(*) FROM FLASHBACK_QUERY_TEST AS OF TIMESTAMP TO_TIMESTAMP('&T','YYYY-MM-DD HH24:MI:SS');
old   1: SELECT COUNT(*) FROM FLASHBACK_QUERY_TEST AS OF TIMESTAMP TO_TIMESTAMP('&T','YYYY-MM-DD HH24:MI:SS')
new   1: SELECT COUNT(*) FROM FLASHBACK_QUERY_TEST AS OF TIMESTAMP TO_TIMESTAMP('2010-02-01 07:15:30','YYYY-MM-DD HH24:MI:SS')
            COUNT(*)
                   0HTH!

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