Oh yeah! How could I forget: make darn
sure that you are working with Oracle Support actively, step-by-step, if you are
in a scenario which might call for the use of these parameters. It would
be *disastrous* to start down this road if unnecessary, and there are other
quirks when using them that only OWS can diagnose and overcome...
...need my coffee, NOW!
----- Original Message -----
From: Tim Gorman
Sent: Thursday, September 19, 2002 7:03 AM
Subject: Re: Lost ofall redo logs One correction...
The undocumented "_corrupted_rollback_segments"
parameter does not take a TRUE/FALSE value setting. It is another
list of rollback segment names (similar to "rollback_segments" and
"_offline_rollback_segments") which will be considered corrupted.
Roughly, the meaning of these undocumented
parameters is (and I'm doing this from memory and pre-morning-coffee so
those who know please correct as needed):
I'm sure that you can all see the danger in
using these parameters. Transactions that should be rolled back will not
be.
With "_offline", the database will attempt
to use info within the RBS but will never allow the RBS to be brought online for
new transactions. You use "_offline" if you think you can get away with
salvaging the data in the RBS.
With "_corrupted", there is no hope, which
is usually the situation if the header block of the RBS is corrupted. In
this case, the "after-image" data stored in the data segments (i.e. table,
cluster, and index) are considered as "committed", since there is no way to tell
if they really were or weren't. The fact that the "after-images" may have
been incomplete only adds to the fun and excitement...
As Arun had indicated (but not fully
enough!), a database opened with either of these parameters really cannot be
"trusted" for future use. The firm recommendation is to use the database
instance thus opened merely to salvage as much data as possible for import (one
way or another) into a freshly-created new database. Using these parameters will put the database on life-support
for a short time only, hopefully long enough to extract its data. It would
be foolish to entrust new data to it ever again...
Hope this helps...
-Tim
----- Original Message -----
From: "K Gopalakrishnan" <[EMAIL PROTECTED]>
To: "Multiple recipients of list ORACLE-L"
<[EMAIL PROTECTED]>
Sent: Thursday, September 19, 2002 12:58
AM
Subject: RE: Lost ofall redo logs
> > You are right. The original poster *clearly* said > > LOST ALL REDO LOGS > NO BACKUP. > > In the above situation, you have to open the > databases using the some special tricks and > I don't think you need to go back and refer > BAckup and Recovery Manuals (You can not > find anything for this situation, that is > another story) > > Those parameters will bring up the database > if the database is cleanly shudowned (read: > Shutdown Normal/Immediate) and you will > have to do some more tricks to get the > database up if it is crashed (read: shutdown > ABORT). > > I don't think it is a bad advice.. > > YMMV > > KG > > > -----Original Message----- > Chakrapanirao > Sent: Wednesday, September 18, 2002 11:08 PM > To: Multiple recipients of list ORACLE-L > > > Well one I do want to make clear I have never tried to give bad advice to > people. > Since the user in his mail had said that he does not have a backup and does > not have any online redo logs can you please let me know how else can he > open the database, when he said he does not have a back it assumes that he > does not have a os backup and also the rman backup. > This might be the undocumented thing but this Is the only way it works > And this had happened in one our case and the only way we could open the > database is to force open the database in a corrupt mode take an export and > import back into the new database. > > If you still think I am trying to give a bad advice well sorry that I am > giving bad advices. > > > -----Original Message----- > Sent: Thursday, September 19, 2002 12:33 AM > To: Multiple recipients of list ORACLE-L > > Arun, since WHEN has been using undocumented parameters the normal way > of doing things, I think you need to go back and lookup backup/recovery > concepts. > > Feel free to read both user managed and RMAN backup recovery docs/scenarios. > > You are giving bad advice to people on the list who might be new. > > joe > > > Arun Chakrapanirao wrote: > > >The only way u can open your database is to add a parameter file > >as > > > >_allow_resetlogs_corruption=TRUE > > > >_corrupted_rollback_segments= TRUE > > > >_offline_rollback_segments=(the rollback segment names) > > > >activate the database and then immediately take an export of the whole > >database. > >Create a new database and then import all the data to this new database. > > > > > >-----Original Message----- > >Sent: Wednesday, September 18, 2002 5:23 PM > >To: Multiple recipients of list ORACLE-L > > > >Nop, all redo logs gone away... > > > >----- Original Message ----- > >To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> > >Sent: Wednesday, September 18, 2002 5:43 PM > > > > > > > > > >>What about mirrored redo group members? > >> > >>Igor Neyman, OCP DBA > >>[EMAIL PROTECTED] > >> > >> > >> > >>----- Original Message ----- > >>To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> > >>Sent: Wednesday, September 18, 2002 4:30 PM > >> > >> > >>Hi people... > >> > >>What to do if I have LOST ALL REDO LOGS and i don4t have any backup? > >> > >>Thanks in advance! > >> > >>::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: > >>Gilberto Gampert Universidade de Passo Fundo > >>Administrador de Banco de Dados Passo Fundo - RS - Bra5il > >>[EMAIL PROTECTED] http://www.upf.br > >>::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: > >> > >> > >>-- > >>Please see the official ORACLE-L FAQ: http://www.orafaq.com > >>-- > >>Author: Gilberto Gampert > >> INET: [EMAIL PROTECTED] > >> > >>Fat City Network Services -- 858-538-5051 http://www.fatcity.com > >>San Diego, California -- Mailing list and web hosting services > >>--------------------------------------------------------------------- > >>To REMOVE yourself from this mailing list, send an E-Mail message > >>to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > >>the message BODY, include a line containing: UNSUB ORACLE-L > >>(or the name of mailing list you want to be removed from). You may > >>also send the HELP command for other information (like subscribing). > >> > >>-- > >>Please see the official ORACLE-L FAQ: http://www.orafaq.com > >>-- > >>Author: Igor Neyman > >> INET: [EMAIL PROTECTED] > >> > >>Fat City Network Services -- 858-538-5051 http://www.fatcity.com > >>San Diego, California -- Mailing list and web hosting services > >>--------------------------------------------------------------------- > >>To REMOVE yourself from this mailing list, send an E-Mail message > >>to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > >>the message BODY, include a line containing: UNSUB ORACLE-L > >>(or the name of mailing list you want to be removed from). You may > >>also send the HELP command for other information (like subscribing). > >> > >> > >> > > > > > > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Joe Testa > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Arun Chakrapanirao > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: K Gopalakrishnan > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). |
- Re: Lost ofall redo logs Joe Testa
- RE: Lost ofall redo logs Arun Chakrapanirao
- RE: Lost ofall redo logs K Gopalakrishnan
- RE: Lost ofall redo logs Robertson Lee - lerobe
- RE: Lost ofall redo logs Mark J. Bobak
- RE: Lost ofall redo logs Bill Buchan
- Re: Lost ofall redo logs Joe Testa
- Re: Lost ofall redo logs Joe Testa
- RE: Lost ofall redo logs K Gopalakrishnan
- RE: Lost ofall redo logs Mercadante, Thomas F
- Re: Lost ofall redo logs Tim Gorman
- Re: Lost ofall redo logs Ray Stell
- RE: Lost ofall redo logs Viral Desai
- Re: Lost ofall redo logs Tim Gorman
- Re: Lost ofall redo logs Gilberto Gampert
- RE: Lost ofall redo logs Robertson Lee - lerobe
- Re: Lost ofall redo logs Joe Testa
- RE: Lost ofall redo logs Mercadante, Thomas F
- RE: Lost ofall redo logs Naveen Nahata
- RE: Lost ofall redo logs Mercadante, Thomas F
- RE: Lost ofall redo logs Steve McClure