The Exadata move

The move to Exadata and Cloud at Customer - Database:

Why Exadata:

Performance - Exadata is engineered to run the Oracle database, and we can now eliminate hardware as a cause of performance problems, eliminate storage latency issues.

Every feature of the Oracle Database - enough said.

Why Cloud at Customer:

Alleviates problems with hardware and avoiding patching and hardware problems seems like a big win to me.
Data security: Unfortunately we have some very important information stored in our system and the cloud was not an option
Scalability: With PAAS we will be able to meet our horizontal scalability needs.

Interesting findings and other notes:

1) Maximum 8 VM's on the Exadata
2) Active / Active and RAC

Database conversion:
1) Character Set Conversion: https://docs.oracle.com/database/121/NLSPG/ch11charsetmig.htm#NLSPG983 there is a document and a utility (DMU), color me surprised. (https://www.oracle.com/technetwork/database/database-technologies/globalization/dmu/overview/index.html)

2) Varchar2 sizes and upgrade to greater than 4000 chars: With the conversion to avoid truncation we moved to 4000 char instead of bytes and extended our string size. MAX_STRING_SIZE

3) Moving nightly jobs to the database using dbms_scheduler: Ended up being quite easy, just the zipping we where doing needed a bit of effort.

4) Export import
5) Possible 18c upgrade

Comments

ADF sort of generic screen for tables with the same structure

We have a couple (about a hundred) of tables with the same structure (Code, Description, Create Date, Update Date). So I wanted to do something simple so that I did not have to create all these screens 1) EO I created the EO based on one of the tables I had that had the above columns. I then Added a transient attribute called table name to my EO based on a groovy expression. (the expression needs to change as I am reading web tier stuff from the model layer but I will fix this later) I then generated a java class for my EO. And added the following overriden method to my newly created java class. protected StringBuffer buildDMLStatement(int i, AttributeDefImpl[] attributeDefImpl, AttributeDefImpl[] attributeDefImpl2, AttributeDefImpl[] attributeDefImpl3, boolean b) { StringBuffer statement = super.buildDMLStatement( i, attributeDefImpl, attributeDefImpl2, attributeDefImpl3, b); return new StringBuffer(StringUtils.replace(statement.to...

MANIFEST.MF merge JDeveloper for an executable jar

Goto your project > properties. Then click on deployment in the menu. Edit or add a jar deployment profile. Fill in the details under jar options (select Include manifest and give it a main class name) Also remember that the merge functionality only works with a BLANK line at the end of the merge file. REALLY this caught me. My merge file contents: Class-Path: commons-codec-1.3.jar [...empty line here CRLF...]

ADF: LOV Description instead of code

I keep on forgetting how to do this so this is a note to self in terms I understand (ie pictures): Add the related entiy object to yours (in the example we are adding RegionEO(list of values) to CountryEO) Now add the RegionName field from the EO and a transient attribute (I named mine RegionNameLOV) Make the transient attribute updateable and base it on the expression RegionName (the description you wish to display) Add a list of values to RegionNameLOV and map BOTH key to parent fk (region id here) AND RegionName to your transient coulmn (RegionNameLOV). Map the transient as an Input text with List of Values. Then just drag the lov item onto the page (RegionNameLOV)

The Incident Archive

Search This Blog