dmu introduction 1
DESCRIPTION
DMU Introduction 1TRANSCRIPT
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1 © 2009 Oracle Corporation – Proprietary and Confidential
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AGENDA
• Presentation – approximately 45 minutes
• Q&A Session – approximately 15 minutes
• Web attendees can ask questions via Q&A panel
• Phone attendees can ask questions via Q&A panel or
phone (operator assisted)
© 2012 Oracle Corporation – Proprietary and Confidential
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ATTENTION – AUDIO Options
You can
• either listen the audio broadcast on your computer
• or join teleconference (dial in)
© 2012 Oracle Corporation – Proprietary and Confidential
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Voice Streaming – Audio Broadcast
• Listen only mode
• Advantage: no need to dial in
• What about Questions?
Type your questions into WebEx Q&A panel
• If you prefer full audio access in order to
ask questions directly, please connect to
our teleconference
• Connect details you will find at next slide
© 2012 Oracle Corporation – Proprietary and Confidential
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ATTENTION – AUDIO INFORMATION
Teleconference Connect details:
1. Conference ID: 85493267
2. International dial in: +44 (0) 1452 562 665
3. List with national toll free numbers is available in note 1148600.1
You can view this info anytime during the conference using
Communicate > Teleconference > Join Teleconference
from your WebEx menu
© 2012 Oracle Corporation – Proprietary and Confidential
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<Insert Picture Here>
Introduction to DMU (Database Migration Assistant for Unicode)
Presenter : Gunther Vermeir Principal Technical Support Engineer
© 2012 Oracle Corporation – Proprietary and Confidential
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AGENDA
• Presentation – approximately 45 minutes
• Q&A Session – approximately 15 minutes
Web attendees can ask questions via Q&A panel only
Phone attendees can ask questions via Q&A panel or phone
(operator assisted)
• Advisor Webcast Archived Recordings DocID 740964.1
© 2012 Oracle Corporation – Proprietary and Confidential
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AUDIO INFO - Teleconference
Connect details:
1. Conference ID: 54194888
2. International dial in: +44 1452 562 665
3. List with national toll free numbers is available in note 1148600.1
You can view this info anytime during the conference using
Communicate > Teleconference > Join Teleconference
from your WebEx menu
© 2012 Oracle Corporation – Proprietary and Confidential
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type your question here 1
Q&A panel
Send your question 3
Ask: ALL PANELLIST leave default! 2
© 2012 Oracle Corporation – Proprietary and Confidential
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your question pop-up here
© 2012 Oracle Corporation – Proprietary and Confidential
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The following is intended to outline our general
product direction. It is intended for information
purposes only, and may not be incorporated into
any contract. It is not a commitment to deliver any
material, code, or functionality, and should not be
relied upon in making purchasing decision. The
development, release, and timing of any features
or functionality described for Oracle’s products
remains at the sole discretion of Oracle.
Safe Harbor Statement
© 2012 Oracle Corporation – Proprietary and Confidential
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<Insert Picture Here>
Introduction to DMU (Database Migration Assistant for Unicode)
Presenter : Gunther Vermeir Principal Technical Support Engineer
© 2012 Oracle Corporation – Proprietary and Confidential
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Notes and links
The Database Migration Assistant for Unicode (DMU) Tool (Doc ID 1272374.1)
http://www.oracle.com/technetwork/database/globalization/dmu/overview/index.html
Related: AL32UTF8 / UTF8 (Unicode) Database Character Set Implications (Doc ID 788156.1)
© 2012 Oracle Corporation – Proprietary and Confidential
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16 © 2012 Oracle Corporation – Proprietary and Confidential
Going to AL32UTF8 or UTF8
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140 © 2012 Oracle Corporation – Proprietary and Confidential
Validating an AL32UTF8 or UTF8
database
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168 © 2012 Oracle Corporation – Proprietary and Confidential
How to provide information when
logging a SR
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Are You Ready
To Get
Proactive?
Avoid the unexpected
Don’t leave value on the table
Lower overall organizational costs through preventative
maintenance
Reduce risks and maximize uptime
Achieve resolution faster
Streamline and simplify your daily operations
Get even more through connection
Discover more about Get Proactive https://support.oracle.com/CSP/main/article?cmd=show
&type=ATT&id=1385165.1:DISCOVER
ACT Get Proactive Access proactive capabilities available for your products
by visiting the product pages at My Oracle Support;
Article ID 432.1
Contact the Get Proactive team
today for help getting started [email protected]
© 2012 Oracle Corporation – Proprietary and Confidential
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Q&A panel
type your question here 1
Send your question 3
Who to ask? 2
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Questions and answers • We are in the planning process of converting our PS financial
database from database character set 1252 to AL32UTF8. Can
this method be used for that? The database size is about 2T�and
the db version is 10.2.0.4.
Yes, if the OS is supported you can use this tool. The database
size as such is not very relevant – what is more relevant is how
much convertible data you have.
• Can DMU be used from MSSQLSERVER/SYBASE/DB2
database to oracle database?
No. DMU is Oracle only.
• Is DMU free?
Yes.
• What about long, LOB data type ? Will that be migrated from one
db to other db - say 10.2.4 on AIX to 11.2.0.3 on Sun Solaris ?
(continued)�
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Questions and answers (cont.) (cont.) DMU is not a migration tool. DMU changes the encoding
of a database – it will not take the data from a 10.2.0.2 and move
it to a 10.2.0.3. For that you have the Export /Import tool.
Yes, it works with longs and clobs. It works with all character
datatypes.
• What about dictionary migration problems ?
DMU already addresses a lot of the dictionary table conversion
related problems. This is one of its strong points when compared
to CSSCAN.
• This conversion needs a source and target / a repository ?
It is a tool that works on one database.
• Is DMU clever enough to resume after failure.
It is resumable. If during conversion you have an error, DMU will
stop and you will have the chance to see what is going on and
resume the operation. There are some rare cases when it is best
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Questions and answers (cont. 2)
(cont.) to go back to the backup and start from there, but these
are very rare cases. It is always recommended to always have a
backup when attempting to change the database characterset.
• Can DMU can be used to convert a UTF8 database to
AL32UTF8?
Yes.
• Does DMU give you an estimate of the tablespace size increase
(if any) before the actual conversion ? �
Yes, it does, but it is an estimation.
• Running this from client is risky at times for a DB in size of
several TBs, is it possible to create jobs after validation/cleansing
to let the conversion run in the background?�
Actually, most of it runs in the background. The client
communicates with the server where the process actually runs.
You can run it on the server itself if worried about (cont.)
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Questions and answers (cont. 3)
• (cont.) connectivity issues. It is a Java based client, so you can
run it on any server with Java v.6 on. It does need a TCP listener
connection though.
• Can I use in cross platforms like Windows server to Unix server
on same database version ?
There is not a DMU for 10.2.0.3 and a DMU 10.2.0.2. There is a
client which is a Java tool and it can connect to a database on a
different platform. You can run DMU from a HP-UX machine to
convert a database located on a Windows machine or viceversa.
That’s not an issue.
• What would be the sizing impact from migrating from utf8 to
AL32UTF8� ?
Almost 0.
• Do I need to install the DMU tool on server side itself?�
(continued)
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Questions and answers (cont. 4)
(cont.) No. There are 2 components: the Java tool client which
you can download as a zip file, unzip and install and the
database which must have a certain version and patch installed.
They are totally separate.
• �Are there are scripts available to group the exceptions from the
underlying DMU tables?
There are no scripts available yet. If you like scripting you can
still use CSSCAN.
Just to mention, CSSCAN/CSALTER and DMU are totally
different things (though they try to obtain the same) and in a
database where both DMU and CSSCAN run, DMU will have no
idea about what CSSCAN is doing.
• We have 80,000 exception records how does one know what can
be fixed manually or in batch mode ? (continued)
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Questions and answers (cont. 5)
• (cont.) It depends on the exceptions. If it’s invalid representation,
then sample data and try to figure out which encoding is and try
to use that as a character set. If the column is not large enough,
check if you can use CHAR semantics or if you can enlarge
column. The size means that there will be a lot of work, most
likely the errors address multiple tables. But the tool does not
know what you wish to do further. If the data is not desired
anymore, use export/import and then the data will become “?”.
• CSCAN and CALTER still supported with 11g ?��
Yes.
• � Does this work for Oracle EBS suite database? �
�Yes.
• Is DMU supported by Oracle Support currently?
Yes.
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Further Info & Help
• Advisor Webcast Archived Recordings (Doc ID 740964.1)
• Advisor Webcast Current Schedule (Doc ID 740966.1)
• DB Newsletter (Doc ID 1284265.1)
• MOS Community Database Administration / SQL Language
© 2012 Oracle Corporation – Proprietary and Confidential
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196 © 2012 Oracle Corporation – Proprietary and Confidential
THANK YOU