Adding more large size Redo log groups in RAC, ASM

Hi people,

Version of database - 10.1.0.4.0
Version of the OS - AIX 5.3
Node 2 RAC and ASM

We had 4 groups of log roll forward of any size on the two nodes.yesterday, I added 4 new larger size groups using pl/sql developer tool and deleted the old 2 redolog groups. But I'm not able to remove the rest of the 2 groups of old.

ORA-01567 a log2 fall would have less than 2 log files for example 1.

Our redolog files are the SAN and the two points of the same storage node. When I pulled this command line query

SELECT v$ logfile.member, v$ logfile.group #, v$ log.status, v$ log.bytes
V $ log v$ logfile
WHERE v$ log.group # v = $logfile.group #;

I had the same result for both nodes.

The problem that I think, is that all 4 new newspaper groups are added to instance 2 and its old 2 grouips are are also deleted.


Now my question is that:

1 should I I added groups of redo log separately on the two nodes of storage is the same for both nodes?
2 redologs groups are defined separately for each node?

How can I assign 2 new groups of newspapers to instantiate redo 1?

Kind regards

Redo log group should minus 2 groups each of the thread.
But it is good to use 3 groups... each of the threads.

and 2 members on each of the groups.

all redo check journal... from v$ session, v$ logfile, v$ archvied_log

If you mean the idea to determine approximately the size of the log to roll forward... you can check newspaper alerts.

or

ALTER session set nls_date_format = "YYYY/MM/DD HH24:MI:SS;
Select INST_ID select, name, control gv completion_time $ archived_log by 3.1.

Good luck

Tags: Database

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        27          3       3768  524288000          2 YES       INACTIVE                                            1.2103E+13 09-SEP-2011 14:02:05

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    The above steps won't work?

    There is no point in writing in the document if you do not actually test what you write

    It seems that you are working with Oracle managed files. In this case:

    You will find that your "apparently" in step 2 is not correct, and that your step 4 will throw an ora-01276.

  • Recreate the Member lost/damaged redo log in a group

    DB version: 11.2.0.4

    OS: Oracle Linux 6.5

    In this particular PB we have multiplexes recovery logs (2 members from each group of redo).

    If one member of a group of Redo log is corrupted then, regardless of whether the Member belonged to the Group that is CURRENT, ACTIVE or INACTIVE, can we just let GO and CREATE the file journal lost this group member by following the steps below?

    -Find the corrupted Member

    SELECT GROUP #, STATUS, MEMBER OF V$ LOGFILE WHERE STATUS = 'INVALID ';

    1 back UP the DB

    2. CHANGE THE SYSTEM CHECKPOINT;

    3 ALTER DATABASE CLEAR LOGFILE GROUP 3;  - , This step should not be executed. Right?

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    5 ALTER DATABASE ADD LOGFILE MEMBER ' / oracle/oradata/wms/redo02b.log' to GROUP 3.

    When I googled for steps, I found the table below in the official documentation of the Oracle. This table is applicable only if the ENTIRE REDO LOG disappeared.

    http://docs.Oracle.com/CD/E25054_01/backup.1111/e10642/osadvsce.htm#CACFJDBG

    I want just the steps if only 1 member of a multiplex group is lost/damaged.

    3. ALTER DATABASE CLEAR LOGFILE GROUP 3;  -This step should not be executed. Right?

    Yes. It's true. You can refer to the section 'Recovery after losing a member of the a multiplex online Redo Log group' under recovery after the loss of online redo log files: scenarios

    HTH

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  • All groups of redo log is active

    Hello dear gurus!

    After the closing of the database with the option "Cancel".
    We have unconsisten State of data files.
    I ask to explain:
    (1) - ARCH background processes flashes all redo buffer in redolog?
    (In other words how achieved consistency if all redo log groups was in Active state before you stop?)

    (2) where the content buffer in this case are being dumped?

    Thank you and best regards,
    Pavel

    Published by: Pavel on July 19, 2012 21:49

    Pavel wrote:
    After the closing of the database with the option "Cancel".
    We have unconsisten State of data files.
    I ask to explain:
    (1) - ARCH background processes flashes all redo buffer in redolog?
    (In other words how achieved consistency if all redo log groups was in Active state before you stop?)

    He is the author of newspaper (lgwr) that copies the buffer log in log files - but if you make a judgment that the last piece of information in the log buffer is not copied, he lost.
    Note: one of your log files will be CURRENT, that's the one that the editor of newspaper is written, ASSETS are simply online redo logs that are still necessary for recovery and therefore can not be overwritten.

    (2) where the content buffer in this case are being dumped?

    See (1) - they are not.

    Concerning
    Jonathan Lewis

  • Redo log and members groups

    Hi I got very confused by looking at the documentation of redo log groups and members of 11g.

    Please could someone help me with that?

    -What is the difference between a group of newspapers of restoration by progress and members within the Group?

    -How does add a member help protect / multiplex a group?

    -I am course I've read that if all members of the current redo log group are damaged, then 2 other groups does not bring the database back to how it was? ... so what's the point of having them?

    Any help would be appreciated

    806595 wrote:
    OK thanks, so again an allows for example, we had only one newspaper group and the database was NOT in archivelog mode, once the newspaper filled redo id, it would be re-written and proevious changes would be lost?

    Before you start, don't forget not that whenever you would need redolog groups, this will be the mandatory requirement, 2:1, and that means that 2 groups of newspaper with 1 member of each. Now, the newspaper group is a logic thing. There is no such thing actually exists. His way to the club/join/merge/combine/group multiple and physics redo log files that are written together. A minimum of a physical member is a must in a group, therefore 2:1.

    Now, groups of newspapers (and in their midst, the log files are in fact) are written sequentially by LGWR, which means that LGWR would write about a group and all its members at the same time, fill it out completely and then made a switch (called a LOG SWITCH) to the next group of inactive log and keeps current processes. This is why a minimum of paper two groups are needed for the LGWR to work. The ius of work done on a single group and when the switch happens, work of the previous, filled will be controlled for the data files and will be marked as inactive thereafter, which makes even elgible for the LGWR to write to.

    HTH
    Aman...

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