How to handle and manage a multi Database access in runtime with LCDS?

Hello there
I got several customer working with the same application and I wonder how, with LCDS, to manage in a runtime a multi dataBase access; without creating a configuration "mxl" file in
the folder catalina for each database.
Indeed, each customer have their own dataBase, and so far, I did not find out how to avoid creating a config xml file in catalina for every single database; which force me to create as well for each customer a folder application, since the name of the config file in catalina require a folder application to be ran under tomcat....
Thus, my question is :
Is there anyway to create only one configuration mxl file in catalina (in the server side) and then from the client side (application) let the user select its environment (meaning its database) to run the application.... this technic can be also used for multi database environment such as : Dev / Test / Prod environment (or database) where the same application can access to.
Please if any one have an idea or already delt with; just let me know, because I'm entering in a bootle neck and the situation is getting serioulsy critical....
Regards

Hello Ulrich,
with compact and repair I mean the MSAccess function "Compact and Repair".
Please follow the link below for more details:
http://office.microsoft.com/en-us/access-help/compact-and-repair-an-access-file-HP005187449.aspx
Normally you can execute this function directly in Access or with the Windows ODBC Data Sources Administrator => "Control Panel" => "Administrative Tools" => "Data Sources (ODBC)"...
I want to execute this function via cvi code and not by hand ;-).
Thank you for your support.
Frank

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How to handle and Manage Multi DataBase access with LCDS in runtime ?

Hello there
I got several customer working with the same application and I wonder how, with LCDS, to manage in a runtime a multi dataBase access; without creating a configuration "mxl" file in
the folder catalina for each database.
Indeed, each customer have their own dataBase, and so far, I did not find out how to avoid creating a config xml file in catalina for every single database; which force me to create as well for each customer a folder application, since the name of the config file in catalina require a folder application to be ran under tomcat....
Thus, my question is :
Is there anyway to create only one configuration mxl file in catalina (in the server side) and then from the client side (application) let the user select its environment (meaning its database) to run the application.... this technic can be also used for multi database environment such as : Dev / Test / Prod environment (or database) where the same application can access to.
Please if any one have an idea or already delt with; just let me know, because I'm entering in a bootle neck and the situation is getting serioulsy critical....
Regards

Hello Ulrich,
with compact and repair I mean the MSAccess function "Compact and Repair".
Please follow the link below for more details:
http://office.microsoft.com/en-us/access-help/compact-and-repair-an-access-file-HP005187449.aspx
Normally you can execute this function directly in Access or with the Windows ODBC Data Sources Administrator => "Control Panel" => "Administrative Tools" => "Data Sources (ODBC)"...
I want to execute this function via cvi code and not by hand ;-).
Thank you for your support.
Frank

Question on "How to Handle Inv management Scenarios in BW" docuemnt.

Hi all,
I read the document "How to Handle inventory management scenarios in BW" and I did not understood what a snapshot scenario is? Can anyone tell me what is the difference between snapshop and non-cumulative scenario's.
thanks,
Sabrina.

In a non-cumulative scenario the current stock of any day (or month) is not stored physically in the cube. Instead the stock values over time is calculated dynamically at query runtime by the BW OLAP engine, which basically derives the stock by summing up the periodic value changes (cumulative inflow and outflow of the non-cumulative key figure), which are stored in the cube (together with a so called stock marker used as the basis of the calclation).
In the snapshot scenario the current stock of any month is calculated in a snapshot ODS and then loaded to a cube. This means that the the stock value is physically stored in the cube in an ordinary cumulative key figure.
Since a non-cumulative cube store value changes and not the actual stock this means that performance might be bad if there are many value changes for each characteristic combination in a month (since the stock is calculated at runtime and many records must be processed to derive the stock). So in this case the snapshot scenario is better since no runtime calculations of the stock need to occur and since only one record, containing the actual stock value will be stored in each month for each characteristic combination having a stock value.
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/ Christian
Message was edited by: Christian

How to handle inventory management scenario

Hi All,
In How to handle inventory management scenario whitepaper, I fail to understand the basic difference between 'Inventory Management with non-cumulative Key Figures' and 'Inventory Management with Snapshots'. Can anyone please explain me the basic difference.
Thanks
PB

Hi Loic
Can u please see if all the steps listed below are OK.
While setting up the IM Scenario
I have jotted down the steps with valuable inputs from you and paper 'How to Hanlde IM scenarios'
Please find the steps below. Kindly review them and let me know in case I have got anything wrong or missed out on anything.
1. Transfer Business Content Datasources 2LIS_03_BX , 2LIS_03_BF, AND 2LIS_03_UM in RSA5.
2. Go to Transaction LBWE, Activate Datasources 2LIS_03_BF, AND 2LIS_03_UM.
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8. Run SETUP for 2LIS_03_BF, AND 2LIS_03_UM using TCodes OLI1BW and OLIZBW respectively.
9. Run the extraction for 2LIS_03_BX in BW.
10. Compress the request with No Marker Update NOT SET i.e. unticked or unchecked.
11. Run the extraction for 2LIS_03_BF in BW.
12. Compress the request with No Marker Update SET i.e. ticked or checked.
13. Run the extraction for 2LIS_03_UM in BW.
14. Compress the request with No Marker Update SET i.e. ticked or checked.
Steps 1 and 2 shall be executed in Development and transported to production and step 3 onward should be carried out in Production itself with Posting Block.
Thanks in advance.
Regards
PB

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How to handle Keys (Sequences) generated in Database

Need some pointers about how to achieve following:
I am building a cache for TRADES and have a CacheStore supporting LOAD/STORE/REMOVE methods.
The TRADES cache is associated with TRADE table on the database. I have most of my business logic related to adding a trade in a Database Package.
If a new trade is being added to the table, Stored Procedure in my package will use a sequence number to assign it a UNIQUE KEY and will return the key with the call
Now, my cache is using TRADE KEY as a key for the trade objects. If my application is putting a new trade to the cache, then how should this be designed?
I do not really want to have sequences put in the cache as my stored procedure does it for me and there are few other applications which are using same SP.
Has anyone implemented something like this where the key is now known until the object is entered in the database?
I can have a TEMPORARY KEY assigned to the object and can replace the record once the trade has been successfully added to the table. As I can not do replace/update cache records in CacheStore, is there any way to achieve this?
Following is my cache-config:
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                    <local-scheme></local-scheme>
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                         <class-name>com.db.spg.sweet.coherenceutil.DBCacheStoreTrade</class-name>
                         <init-params>
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                                   <param-type>java.lang.String</param-type>
                                   <param-value>{cache-name}</param-value>
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     <autostart>true</autostart>
</distributed-scheme>I am trying to be as clear as possible. If anything here is confusing, let me know.
Thanks

Jonathan.Knight wrote:
<li>The AQ messaging is asynchronous so there will be a time-lag between the original put of the trade and it being updated with the version from the DB.
<li>How does the AQ listener know what the key is of the temporary trade is that it needs to remove, presumably you write this to the DB then send it back in the AQ message?Agreed. From my CacheStore, I call Stored Procedure inside Database Package. I can pass this TEMP key to this SP as 1 extra parameter. So, I do not necessarily need to store it in the database, but just use merely as an extra parameter to be sent back to AQ. Also, when the client puts a new trade, the business logic for most of the trade processing is in our stored procedures. There, it will enrich that trade with additional information from other tables, it will also adjust the trader position and then will return with the new trade key to the client. GUI/Client Applications will provide the data required to create a trade. But SP will use this data and using other local stored procedures, it will obtain extra information for the trade, enrich all the information in a single trade record and then will create that new record.
<li>If the code the listens to the AQ messages removes the original version of the trade from the cache before putting the new version into the cache you will have a short period of time where there is that trade does not exist in the cache
<li>Alternatively if your AQ listener works the other way round and puts the new version into the cache before removing the original version you will have a short period where there are two copies of the same trade in the cache.
<li>Depending on what you use-cases for reading these trades back out of the cache you could have issues with the above times when there may be one, zero or two copies of the trade.Yes. I have been thinking about that as well. But I think, as the trade entered from GUI is merely an indicator for the background/database processing. If and only if the database processing is successful, that is considered a valid trade. So as far as I know, the duplicate/old copy of the trade would still be considered as in "waiting database update" state. I am designing my GUI accordingly. I will probably check with the users about this requirement once again though. You have a valid point.
<li>I assume your use-cases for accessing trades from the cache are not using the keys as they could not rely on having obtained the correct key for a trade as it might change. At this point, I am using these TRADE keys as my cache keys. Because, it is really easier for us to manage TRADES in the cache, especially when there are lot of lookups involved from our users
One more thing someone I had worked with long time back suggested that, having a staging/metadata cache for all these trades to be processed from the client. Add these trades in the database and then in QueueListener, add a new trade in Trade-Cache and remove the corresponding old trade from staging/metadata cache. This also seems good, though I need to see if that is going to complicate matters in terms of processing.
Thanks a lot JK for your suggestions. Let me know if the logic I explained makes sence.

Posting block Question in How to handle inventory management scenarios

Hi all - I have a question in document
<b>"How to...Handle Inventory Management Scenarios in BW"</b>
can anyone please tell me what a posting block is in this document...
also I did not understood what a Validity table is?
thanks,
Sabrina.

Hi Sabrina!
A 'posting block' period is something that now you are facing in inventory management, but you have to consider it in ALL logistic cockpit flows (what you can see in LBWE).
This requirement can be easily explained in this way: as you know, to fill a setup table you have to activate the extract structure of the datasource for which you want to run the setup job (otherwise the system says that no active extract structure exists, do you remember ?); but, by doing so with the posting operations open (in other words, users can create new document or change the existing ones), you run the risk that these records are automatically included in the extraction queue (or in SM13 if you are using unserialized method) AND also collected in setup table ! And you will have the same records with the initial load (from setup table) and then the same from delta load (from the queue): a nice data duplication.
To avoid this situation, a "posting block" (or a "free-posting period" or a "downtime") is requested. No one can post new document during your setup job...
Hope now is clearer...
Bye,
Roberto

How to handle and manage a multi Database access in runtime with LCDS?

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