How to Use Partitioning in Mappings

Hello All.
Please could you you help me on this one.
I am using OWB9.2, and would like to use partitioning in one of the mappings.
It is a simple mapping which maps from one table into another going through transformations and aggregations on the way
I would like to use the partitioning capabilities of owb so that it uses the partitioned table which is acting as the source.
I have checked all the options in the configuration for the mapping, but which option should I use!
Please Help!
Thanks again.
Kind Regards
Saif
from a very wonderfully wet Sydney, OZ
(We need the Rain!)

OWB currently supports hash and range partitions. Use hash partitions if you want the database to partition your data automatically (by generating and managing hash keys based on the partition key column you define). Use range partition if you want to control how data is partitioned in the table (partitions will be created that contain a range of values in the partition key column, for example if the partition key is date_created, you can decide that partition 1 contains records where date created is between january 1 and march 31, p2 dates between april 1 and june 30 etc.).
The partition parameters can be found in the configuration pannel of the object - right-click on the object and select configuration. There you will find the partition keys, hash partitions and range partitions entries. Click on the white space to create partitions (this is kind of unintuitive...).
For more details, take a look at the users guide, chapter 5 - Configuring Objects (http://download-west.oracle.com/docs/html/B10996_01/05config.htm#1124708).
Regards:
Igor

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Crospost! How to use Oracle partitioning with JPA @OneToOne reference?

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https://discussions.apple.com/thread/3293948
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How can use row_number() over partition by plz provide some doc.

row_number() over (partition by)
what is this and how can use it in sql query.
if ur have any documentation of it. plz give...me..
thanx sir
thanx in advance.

http://download-uk.oracle.com/docs/cd/B10501_01/server.920/a96540/functions105a.htm
SELECT empno, deptno,
row_number() over (partition by deptno order by empno) rn
from scott.emp
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      7698             30     4
      7844             30     5
      7900             30     6Regards
Dmytro

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First let me apologize for not responding earlier to your response, I tend to get busy and then forget to check back here.
Tod, the answer to your question is No, only one computer is accessing the xserve raid files at any one time and that is via Fibre Channel. However I do have the xserve raids set up as share points via ethernet.
Maybe I should turn that off and only access the files with the one computer that can connect via fibre channel.
I never thought of that. I will try that while I await for your answer, thanks again.
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Qlogic Sanbox 5600
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Anybody have any suggestions?
Thanks
Todd Buhmiller
Widescreen Media
Calgary, Alberta Canada
Tod Kuykendall
Posts: 1,237
From: San Diego
Registered: Oct 11, 2000
Re: Xserve Raid Mounts, Corrupt Directory tired of rebuilding directory
Posted: Jun 27, 2010 1:25 PM in response to: Todd Buhmiller
Are multiple computers accessing the same data on the RAID at the same time?
If so then NO. This is the source of your data corruption and I'm surprised if you were able to get all your data back every time if this is how you've been running your system. Each fibre channel assumes it has full and sole control of every volume it has mounted, no data arbitration is practiced and data corruption will occur if this assumption is wrong.
The only way this set-up will work is to use partitions or LUN masks so the volumes are accessed by one computer at any time. As long as one computer relinquishes control before another mounts it you will dodge arbitration issues but this is a dangerous game. If you screw up and mount an already mounted volume - and there is no easy way to tell if a volume is mounted - corruption will then occur. Sharing data simultaneous at fibre speeds is what XSAN does and to do this you need it.
HTH,
=Tod
Intel Xserve, G5 XServes, XRAID, Promise

+The xserve raids will mount automatically to any computer that I connect the qlogic fc switch to+
This is source of the corruption to your data. Any computer that attaches to a drive/partition via fibre channel assumes that it alone is in control of the drive and data corruption is inevitable.
+Is that the issue, should I disconnect the xserve from the fc switch and leave it connected via ethernet?+
Short answer: YES. The ethernet connections are fine because the server is controlling the file arbitration through the sharing protocol. Fibre channel connections assumes complete control over the partition and no arbitration of the file access is performed. It's like two people independently driving trying to drive the same car to different locations.
Depending on your set-up it is possible for the two machines to see and use different parts of the Xserve RAID storage but they cannot access the same areas without SAN doing the arbitration.
Hope that's clear,
=Tod

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Hi,
I'm not sure whether my answer is good enough for you, but it might help.
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Should I create a projects for each developer and distribute code between the projects using libraries?
- advantage: no unseen changes will happen, as the libraries are readonly.
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Concerning the errors that occur when modifying a library, this might be balanced by the relative independence of the components... If you are able to develop following the dependency tree, you will not meet the problem very often.
Are source code management systems a real help in this problem or do they just "manage" the problem? I already tried SCM and PVCS but was not very happy with the way of working. As JDeveloper is not "really easy" to use with theese tools.Indeed, I do not have a SCMS really able to manage merges in the BC4J XML files... We rather try not to arrive there!
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Regards,
Adrian

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