Convert tablespace from DMT to LMT

Hi Folks,
We have a project comming up for converting all our tablespaces from Dictionary Managed to Locally Managed. We started our pre steps on this task. I'm checking on metalink if there are any know issues or any problems after the convertion.
Please share any issues if you have encountered after converting the tablespaces from DMT to LMT and any performance degradations.
We are on 10.2.0.2 on Solaries and some on 10.2.0.2 on HP-UX . Seems to be weird for you guys that we are still on DMT on 10.2.X
Appriciate your advices..
Thanks
Karthik

Take a look here below :
Re: extent management for system tablespace
Nicolas.

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Migrating SYSTEM tablespace from DMTS to LMTS in Oracle 9.2.0.7

Migrating SYSTEM tablespace from DMTS to LMTS in Oracle 9.2.0.7 using
brspace -f dbcreate
SAP version: 4.6C
Oracle: 9.2.0.7
OS: AIX 5.3
BRTools: 6.40(42)    /** 6.40(10) or (12) will be sufficient according to SAP ***/
IMPORTANT ***************************************
MUST DO:
1. Create a Full Backup of your system
2. Test your Restore and recovery of your backup.
3. Have a copy of all your tablespaces names on hand
4. Know your SYS and SYSTEM passwords
5. Run CheckDB in DB13 to ensure it is completed successfully with no warnings. This reduce the chance of hitting errors in the process
6. Ensure your UNDO tablespace is big enough
7. OSS 400241 Problems with ops$ or sapr3 connect to Oracle
NOTE: OSS 706625(Read this note)
The migration from a dictionary-managed SYSTEM tablespace to a locally-managed tablespace using the PL/SQL procedure DBMS_SPACE_ADMIN.TABLESPACE_MIGRATE_TO_LOCAL is not supported in the SAP environment.
In UNIX, logon as ora<sid>
run command: brspace -f dbcreate
This command will triggers a Menu. The are seven(7) steps to complete the whole process. Do them in sequence, from step 1 to step 7 faithfully. In Step 1, ensure that your settings of PSAPTEMP, PSAPUNDO etc details such as filenames are correct. The rest I leave it as default and they are fine. Do not change redo log group from 8 to 4 even if you only have 4 redo groups. If not, you might need to restore the system! If the seven steps are complete without errors(warnings is acceptable), congrats. Perform a backup again.
Problems I encountered that caused me to restore system:
1./ Problem: I changed the redo group from 8 to 4 and in the later stage after the tablespaces and files are dropped, the system prompted me that 4 is not acceptable! I can't go back then so a restore is performed.
Solution: Leave the default value 8 as it is
2./ I was using wireless network and the network breaks thus process breaks.
Solution: This process in user-interactive and requires you to input confirmation along the way so do it using LAN.
3./ In the process of dropping tablespace PSAP<SID>, I encountered:
BR0301E SQL error -604 at location BrTspDrop-2
ORA-00601: error occurred at recursive SQL level 1
ORA-01555: snapshot too old: rollback segment number 22 with name '_SYSSMU22$" too small
Solution: I have not fixed this yet but I think it is because my PSAPUNDO is too small(800M) so I will increase it to a bigger value e.g. 5GB
4. Problem: Unable to start sap after successfully migrated. OPS$user problem
Solution: logon as <sid>adm, run R3trans -x in a directory that <sid>adm has read/write permission. R3trans -x will creates a file call trans.log. Read the details and refer to OSS 400241
Result: I have successfully performed this on one(1) system and doing this on the another one currently but encounter Problem 3. Will update this further if there are more findings.
REFERENCE:
OSS 748434 New BRSPACE function "dbcreate" - recreate database
OSS 646681 Reorganizing tables with BRSPACE
OSS 541538 FAX: Reorganizations
Message was edited by:
        Annie Chan
Message was edited by:
        Annie Chan
Message was edited by:
        Annie Chan

The current one I am implementing is a development system. The database is less than 100GB. 800MB of PSAPUNDO is sufficient for our development usage.
Follow up on Problem 3:
I created another undo tablespace PSAPUNDO2(undodata.dbf) with size of 5GB. I switched undo tablespace to PSAPUNDO2 and placed PSAPUNDO(undo.data1) offline. With PSAPUNDO2 online and PSAPUNDO offline, I started brspace -f dbcreate and encountered the error below at Step 2 Export User tablespace:
BR0301E SQL error -376 at location BrStattabCreate-3
ORA-00376: file 17 cannot be read at this time
ORA-01110: data file 17: '/oracle/DVT/sapdata1/undo_1/undo.data1'
ORA-06512: at 'SYS.DBMS_STATS", line 5317
ORA-06512: at line 1
I aborted the process and verified that SAP is able to run with this settings. I started CheckDB in DB13 and it shows me these messages:
BR0301W SQL error -376 at location brc_dblog_open-5
ORA-00376: file 17 cannot be read at this time
ORA-01110: data file 17: '/oracle/DEV/sapdata1/undo_1/undo.data1'
BR0324W Insertion of database log header failed
I don't understand then. I have already switched the undo tablespace from PSAPUNDO to PSAPUNDO2. Why the message above still appears? Once I put PSAPUNDO online, CheckDB completes successfully without warning.
I did show parameter undo_tablespace and the result is PSAPUNDO2(5GB).
So exactly, what's going on? Can anyone advise?
===============================================
I have managed to clear the message in DB13 after dropping PSAPUNDO tablespace including contents and datafiles. This is mentioned is OSS note 600141 pg 8 as below:
Note: You cannot just set the old rollback-tablespace PSAPROLL to offline instead of deleting it properly. This results in ORA-00376 in connection with ORA-01110 error messages. PSAPROLL must remain ONLINE until it is deleted. (Oracle bug 3635653)
Message was edited by:
        Annie Chan

Error after Oracle Migration from DMTS into LMTS

Hello ,
I'm sorry, I posted my question again from ABAP General into this forum ABAP Dictionary. I think that here someone can help me in order to proceed with my job in the Development and in production system.
We are using SAP R/3 4.6C, with SAP kernel 2271, Oracle 9.2.0.5 and HP-UX 11.23
I did the Oracle migration from dictionary into locally managed tablespaces on the QTS system (and before that the same migration on a separate system as a copy from production):
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2. import into file for creation of indexes
3. Drop the data and corresponding index tablesspace with brtools - brspace
4. recreate the tablespaces with sapdba or with sqlplus (using the ddl scripts created before dropping the tablespaces) - - I think is my problem
5. import the data with Oracle import command
6. import the indexes from the previously created sql file
7. check optimizer statistics, analyze and next extents
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Because I have also used the sapdba and ddl sql for recreating the tablespaces, I didn't specify the SAP data class for the newly created tablespace.
And in the tables TAORA, IAORA and DDART (what is very unclear for me) 3 rows missing for the USER1, TEMP and ??? data class.
If you try to import some transport in the corresponding tablespace which data class is missing an error ocur.
I have read the Note 646681 - Reorganizing tables with BRSPACE, and I saw the part: If the <reorg_tsp> tablespace contains any of the following tables: SDBAH,SDBAD,DBAML,DBATL,MLICHECK,TGORA,IGORA,TSORA,TAORA, IAORA,SVERS,DD02L,DD09L,DDNTT,DDART,DARTT or SAPLIKEY (SAPLIKEY is only available in NetWeaver 2004s or higher), then you should move them to the tablespace <aux_tsp> by online reorganization using BRSPACE:
brspace -f tbreorg -t <table_list> -n <aux_tsp>
Do you have the same problem?
Do you know how I can solve the problem now after the hole migration was done?
How can I dedicate tablespace data class?
Is it enought to just enter the same rows into the TAORA, IAORA and DDART?
Thanks,
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channel ORA_DISK_1: starting datafile conversion
input datafile file number=00080 name=+PMSCDHF1/p_idx_cddh_dspgd_v1_2011_02.dbf
converted datafile=/appl/oem/backup/temp/3536350174_2821_827849136_extbspace.dbf
channel ORA_DISK_1: datafile conversion complete, elapsed time: 00:01:45
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Starting Control File Autobackup at 03-OCT-13
piece handle=/dbms/oracle/r1110/db_01/dbs/c-3536350174-20131003-02 comment=NONE
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http://docs.oracle.com/cd/B28359_01/server.111/b31107/asm_util.htm#CHDJEIEA
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