RAC with real time knowledge

Hi, I'm interested in learning RAC and dataguard with real time knowledge......... please help me finding some training institution or peoples with real time knowledge
Thanks

The term "+real-time+" has a very specific meaning in Information Technology. See http://en.wikipedia.org/wiki/Real-time_computing for the basic details.
Oracle RAC is not a real-time database.. and nor does the "real-time knowledge" make much sense IMO...
Always difficult to get to grips with the nuances of the English language where it is your 2nd or even 3rd language. But it is important that we speak the same language and understand the same terms and concepts, in Information Technology.

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RMAN in active data guard with real time apply ON without a catalog DB

I would like to know whether I can take RMAN backups (both level 0 & incremental) in active data guard with real time apply ON without a catalog database. version is 11.2.0.3.2. Will it make difference in the control file of standby syncing with primary? Can I use these backups on primary to restore and recover the database(including control file backup)?

Thank you very much msberg. Could you please answer the below queries as well?
Should I cancel Real Time Apply before starting RMAN?
Will it make difference in the control file of standby syncing with primary? Is it possible to use these backups on primary to restore and recover the database(including control file backup)? If possible, how will I do that?

B2MML with real time data

Hi All
I want some B2mml files with real time data.
So exact( maintenance infromation and Production) B2MML that is coming from MIS.
So if anyone have some information regarding this please tell me.
Thanks in Advance
Ramshanker

Hi, Ramshanker.
In the cases where the plant system is directly delivering B2MML documents (such as with certain products from Wonderware, Siemens, and some others), using the data in xMII is quite straightforward.
1) If the B2MML message is not "standard" B2MML (be aware that very few plant vendors use the baseline standard - most have a number of specific extensions), you can add the vendors' schemas or B2MML example documents to xMII by adding them to a ReferenceDocument folder on the server.
2) In xMII BLS, create a transaction (let's assume you called it B2MMLHandler) with one input parameter, of type "XML" (let's assume you called it "B2MMLDocument"). Add a "ReferenceSchema" or "ReferenceDocument" action, and configure it to load the vendor's B2MML format. Use the "assign reference document" menu option to assign this format to the transaction input.
3) You can now use the B2MML document to perform analytics or to map from the B2MML document into any RFC or BAPI calls or ESA service calls from within BLS.
4) The plant system system should "post" the XML data to an xMII transaction using the "Runner" URL as in:
http://<yourserver>/Lighthammer/Runner?Transaction=B2MMLHandler&InputParameter=B2MMLDocument
Of course, if the MES system isn't capable of posting the documents and they are available on the file system, you can use the xMII file actions (or remote file access via FTP) to access and load the B2MML documents, perhaps at a scheduled interval.
Hope this helps get you started in the right direction.
Best regards,
Rick Bullotta

[Solved] QJackCtl won't start in with real time.

Hey all,
I'm having a problem with QJackCtl, I got my version from Extra. The problem is that for some reason Jack won't start in real time mode using QJackCtl. Real Time is checked and marked under the set-up tab, but that little piece of info doesn't seem to make it to jackd. If I start Jack through CLI it works with real time, but not from the GUI.
I figured this out by starting JACK from the command line and then starting QJack. When I would do that it would be running in real time just without the rest of my settings (buffer,periods,sampling rate, etc). So in my head there's an issue with QJackCtl. I've tried to find a solution, but I can't seem to find one. This isn't the first time I've set JACK up on a system, but this is the first time I've had this problem.
The rest of the system is set up and ready to go. Rt Kernel, limits.conf and all other tuning is done.
Is there something I missed when setting this piece of software up? Any ideas?
Solved Edit:
Okay, so right after I posted this I got a crazy idea. When you enter setup in qjackctl on the first page there's a box for server path. The path defaults to "jackd". On that line I added "--realtime", so it looked like a basic CLI start-up of JACK and now it works!
So, if anyone else has this problem go to the Setup tab, in the setup window on the line that says Server Path it should look like this:
jackd --realtime
It worked for me and I hope it helps somebody else out.
Last edited by Zen:Core (2010-04-03 21:41:52)

Which volume? Assuming you're on the most common usecase (single hw audio device) then whatever command line you use (amixer for example) it'll work fine, it'll control the volume of the device rather than the pulseaudio plugin (so other playing apps get affected as well, which is probably what you want). The 'global' volume so to speak.
For multiple hw audio devices it gets tricky though.

I have a PXI-8109 with Real Time installed. That displays USER1 indicator?

HI all,
I have a PXI-8109 with Real Time installed.
That displays USER1 indicator LED on the panel?
Thanks
Solved!
Go to Solution.

Thank you.
The NI PXI-8109 front panel has 4 LEDs.
(Figure 3-1. NI PXI-8109 Front Panel Layout and Dimensions)
- PWR OK/FAULT LED
- DRIVE LED
- USER1 LED
- USER2 LED
The NI PXI-8109 User Manual describes only 2 LEDS:
- PWR OK/FAULT LED
- DRIVE LED
What do USER LEDs on the NI PXI-8109 front panel mean?

Uploading files to SAP using HTML5 /AJAX/Gateway media links with real-time progress bar

Hi All,
Check out the blog post 'Uploading files to SAP using HTML5 /AJAX/Gateway media links with real-time progress bar'
Uploading files to SAP using HTML5 /AJAX/Gateway media links with real-time progress bar
Regards
Prabaharan

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
Which correspondents fine with the
device "hw:0,3"
in my mpd.conf alsa section.
Also sound worked fine withh this config before I started installing ffmpeg-svn and alikes
hokasch:
I tried changing the mixer to "Master" but that did not change much.

Producer/consumer architecture over network variables with Real-Time target.

Hi all,
I am maintaining a producer/consumer data acquisition program to be deployed on a real-time target. The main code is deployed to and run on the real-time target during experiments, but was having trouble because the program was originally designed to write all experimental data to disk on the real time during acquisition, which puts the whole experiment at the mercy of the hard drive. I am now trying to rework the code so that the host takes care of logging, so that my time-critical loops don't have to wait.
I am currently using LabVIEW 8.5
I have two questions:
First, how can I programmatically call the data-logging subvi on the host so that it runs in parallel with the main vi which runs the experiment and collects data on the real-time? I have attached the test code that I have been working with to figure this out, but it does not run the logging vi continuously in the background. I am aware that there is better functionality for this in newer versions of LabVIEW, but I would prefer not to upgrade unless there is no other option. I would like to be able to run my data-generating vi and have it start the data logging remotely.
Second, is there a way in the host VI to read values off the network variable using an event structure rather than polling it for updates?
Any help would be sincerely appreciated!
Attachments:
testRemoteLogging.zip ‏124 KB

VI server
Mark the target VI as served on the machine on which it will execute and use VI server Call by reference to invoke the served VI.
This used to be taught as THE way to communicate syncronously with an RT app.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Error 53 PID Autotune with Real-time fieldpoint control

Hi!
I cannot perform the autotuning PID parameters in fieldpoint cFP-2000 (Real-time control).
It gives me the error 53 as you see in the attachment file. It seems to be because of the autotune wizard vi...???
How can i solve this problem?
Thanks for your help!
Nunix
Portugal
Attachments:
error 53.bmp ‏166 KB

Hello,
LabVIEW RT does not currently support the autotuning feature, because the procedure invokes a wizard that requires user interaction. LabVIEW RT does not support this type of user interface. This wizard is tightly integrated with the PID function itself and would require significant redesign to work in LabVIEW RT.
It is the autotuning VI itself that is not compatible with LabVIEW RT. You can use the "PID Autotuning.vi" as long as you are not targeted to your RT engine. Run your VI in development mode with the "PID Autotuning.vi" in your code. After you receive your tuned gain settings, replace the autotuning vi with the normal "PID.vi" and use your tuned gains for the inputs. You can now target to your RT engine with tuned gains.
Hope it s help.
Isabelle
Ingénieur d'applications
National Instruments France

'Read JPEG File.vi' does not seem to work on PXI with real-time OS

I am trying to read a jpeg file on a PXI system with LabVIEW real-time on it. To test I created a very simple VI (attached) with only 4 objects: 'Path' --> 'Read JPEG File.vi' --> 'Draw Flattened Pixmap.vi' --> 'Picture'.
This VI works fine on my Windows XP host machine, but it does not work on the PXI system. The error code 1 occurs in 'Read JPEG File.vi'.
The jpeg picture is in the same directory as the VI. I don't think I got the path or filename wrong because if I change the file or path name I get another error: 7: 'File/Directory Info in Check Path.vi->Read JPEG File.vi->test.vi'.
Maybe reading jpeg files is not supported on realtime systems? I could not find anything about it. Sol
utions or workarounds are of course welcome!
Attachments:
Test_Read_JPEG.vi ‏23 KB

'Read JPEG File.vi' is not supported on LabVIEW RT. I believe it has to do with special functions or libraries need to be called due to the JPEG image type. Instead you can use a Bitmap and the 'Read BMP File.vi', which I believe is completely implemented in G code.
Keep in mind that the RT System doesn't really have a front panel and that the front panel is only 'available' when LabVIEW is connected to the target such as being targeted or having a remote panel to it. Generally, a deployed RT system doesn't have a UI and just communicates to a Host VI which acts as the UI. Having said that, the BMP file worked when I tested.
Regards,
JR A.

Can anyone send about ALE-MESSAGE CONTROL with real time scenario?

hi friends,
i have doubt on ALE-MESSAGE CONTROL METHOD.
SO, anyone can explain with a real time example.
If have a chance please send with screenshots or with navigations

Check out this blog:
Message Control (Output Control) for ALE
Raja

About DTP with real-time access.

Hello Gurus,
       setting for error handling only has an impact while repairing a DTP request (repair) and during the conversion of the DTP to standard DTP (for example, to correct an error during extraction).
      will you please give a simpel scenario to explain above words?
thank you very much.
Fran

Hi,
Use :
With SAP NetWeaver 7.0, SPS 14, the following changes and enhancements are available for real-time data acquisition:
●      Changes to the menu and the context menu of the monitor for real-time data acquisition
The menu and the context menus for the individual objects in the monitor for real-time data acquisition have been standardized and enhanced. In particular, it is now possible to assign daemons and data transfer processes on various levels using context menu entries. For a complete overview of the functions in the menu and in the context menus, see Monitor for Real-Time Data Acquisition.
●      Assignment of daemons for InfoPackages and data transfer processes (DTP)
To assign InfoPackages and data transfer processes to a daemon, you can call the monitor for real-time data acquisition in the following ways:
○       In the Data Warehousing Workbench using the respective context menu entry Assign RDA Daemon.
○       In InfoPackage maintenance using the Schedule tab page, and in data transfer process maintenance using the Execute tab page.
The button names for jumping to the monitor for real-time data acquisition have changed here. To jump to the monitor, choose Assign Daemon.
●      Repair process chains for repairing a broken data transfer or a missing delta in the DataStore object
In certain situations, a gap in the delta of the DataStore object can occur if there is a closed request in the PSA but there is no corresponding request in the DataStore object. For example, this is the case if a DTP request has terminated due to an error in the transformation. Here, you can create a repair process chain to repair a missing or broken update from the PSA. The repair process chain contains a standard DTP as well as any further processes required for subsequent processing (such as activating the data in the DataStore object or subsequent process chains). When the repair process chain is executed, the complete delta is loaded from the source into the DataStore object and processes for activation and further processing are executed if required.
●      Process types for starting and stopping real-time data acquisition
You can use process chains to control real-time data acquisition using process types Start Real-Time Data Acquisition (RDA) Load Process and Stop Real-Time Data Acquisition (RDA) Load Process.
More Info :
http://help.sap.com/saphelp_nw70/helpdata/en/47/2731751c2a2dede10000000a1553f7/frameset.htm
Regards
Ram.

The problem with Real-Time Data Acqusutuin

Hi , all
I created ds with Generic Delta : Delta-Specific Fields pointed time stamp and in settings checked Real-time Enabl . After that created modeling in BW , made initial update like discribed in SAP Documentation , created one more infopackage with adapter :Real-time extraction from sap , assigned infopackage and dtp to daemon and started job of daemon .
Request stay yellow all of time and dosn't bring no one records of changes in R3 . Anybody know what is the couse for that? Maby I forgot to check something anywhere or star trigger anyone!?

The following setup working fine for me
In R/3 for Generic Delta ---
        Filed Name - AEDTM
        0Calday -- Radio Button - 'ON'
        Upper Limit - 0
        Lower Limit - 2
        Real_Time enabl - Check Box - 'ON'
        New Status for changed records - Radio Button - 'ON'
In BI
    Create infopackage (init) for replicated datasource
    Execute the DTP to load this init data to DSO.
    Do NOT activate DSO
    Now create another Infopack (real_time Enable & ) and create real-time DTP.
In RSRDA
    Create a Daemon
    Assign InfoPack & DTP to Daemon.
    Now start daemon...Here the message says something like 'one of the request is not activated'.
    Now, select DTP under Daemon --> use menu Edit --> Repair Chain --> Execute
    (If repair chain is not yet there then Daemon --> use menu Edit --> Repair Chain --> Generate and
     once this is done execute the using the above path). Once the chain finishs
    Now start Daemon and refresh.
    Now u can see, an open request (yellow) under infopackage.
    As soon as the new records gets load into PSA, then an open request starts under DTP.
    (Note: If no new data available in PSA, no open request starts under DTP)
Also note that, RDA requests (in PSA & DSO Manage) should always be in yellow, that means Real-Time Aquisition is working.

TCP/IP Connecting with Real Time Controller

I have a host running Labview on a windows XP and a realtime embedded controller on a pxi chassis that acts as the server. When the realtime is started it automatically goes into listen mode and listens for a connection from the host. The host opens a connection. After a valid connection is open the Real-Time side goes into a TCP_Read and the host can then send commands that the real time processes and sends to the FPGA on the pxi-chassis.
Now the problem I'm having is how to handle the case when a TCP connection is lost. I can have the TCP_Read on the real-time error on a time out and then go into a listen mode but this isn't very logical because then the host will have to reconnect each time a time out occurs. So if I make the TCP_Read timeout be infinite and if the connection is lost (let's say I unplug the ethernet cable and re-plug it back in) then I cannot recover from this and the Real-time will need to be re-booted.
I've tried to send the Real-time into listen mode if the error code is other than a timeout error (code 56) and have it go back to TCP_read mode if it is a timeout error. But if the connection is lost by means of a physical way (such as me pulling the ethernet wire and plugging it back in) then the Real-Time never sees that the connection is invalid. The host on the other hand can detect it bc it will get an error when it's trying to write?
So my is:
Is there any way to prevent an infinite loop that needs a reboot and at the same time prevent the host from reconnecting every time there is a timeout?

Hi SJeane,
I apologize for taking so long to respond, but I wanted to test this on my end. In doing so, I realized that using the RT Reboot Controller.vi after the connection is lost does not work because the message to reboot cannot be relayed to the target without communication! Thus, to solve this problem, we have to approach it a different way. You mentioned that you tried programmatically clearing errors, but did you try to reestablish connection after clearing the errors? I tested this on my end with a FieldPoint controller, and the attached VIs resumed operation even after unplugging/replugging the Ethernet cable (no reboot). Will this solution work for you?
Peter K.
National Instruments
Attachments:
Reestablish.zip ‏39 KB

Software protection with real time clock

I'm trying get a secure real time clock information for licensing purposes ,I tried hardware dongle like hasp4 with RTC but I was not able not interface the dll and kept coming up with errors.Can anyone suggest a better of getting real time clock information or any available product which I can use.
I even thought of using the system clock but it's doddle to reset the system time.
Help is much appreciated.Thanks in advance
Rajan

One possibility might be to force the computer to access an external time server of your choice and check the time from there.
This example shows how to read the time from a NTP server using LabVIEW.
Attachments:
TimeSync.ZIP ‏266 KB

Problem with Real Time Data Acquisition

Hello,
I tried to built a RDA data flow according to the SAP-Help and this blog (/people/kamaljeet.kharbanda/blog/2006/11/13/real-time-data-acquisition-bi2004s), but I ran into a problem. Everything seems to be fine, but even though the daemon is running no new data is added to the DSO. I'll explain in detail what steps I took and hope someone can pinpoint my error(s).
System is BW4 on SPS 17. My datasource as well as my DSObject are in the same system
1.) Created a transparent table with a timestamp-field for generic delta as a local object.
2.) Created a generic datasource from view/table (used the above table), marked it as realtime-enabled and used timestamp as delta-specific field.
3.) Replicated the metadata for my datasource and activated it.
4.) Created a Data Storage Object with infoobjects corresponding to the table fields
5.) Created a transformation between DataSource and DSO
6.) Created a DTP from Data Source to DSO. The type is realtime-DTP.
7.) Created an InfoPackage for Delta-Initial Load. Update mode: Initialize Delta Process -> Initialization with Data Transfer.
8.) Then I changed my DTP (step 6) to "normal DTP" and executed it. Then activated the data in the DSO. The datasets from the table (which i filled with an ABAP-program) were successfully loaded and activated. So now my DSO contains 5 datasets.
9.) Changed the DTP back to "realtime DTP"
10.) Created an InfoPackage for RDA. Adapter is set to "Realtime extraction from SAP System"
11.) Created a daemon, assigned the IP for RDA and the DTP to the daemon and started it up.
12.) Executed my ABAP program to added 3 datasets to the table which is used as a datasource.
So now in my source table there are 8 datasets, but the daemon won't load them. In my RDA-Monitor (trx rsrda) it shows my daemon, the assigned IP and the assigned DTP (status green). Under the IP there's one yellow request (that should be right according to the help), but unlike the picture in the blog (link see above) there's no request under the DTP.
Job overview (sm37) shows an active batch job and some jobs that are ready (every 10minutes a new batch starts and the old one is closed). the job log shows, that the daemon runs, but loads no data...
i think it might be a problem with the delta extraction somewhere, because the intial load works fine and there are no errors anywhere.
Edit: perhaps my settings in the data source unter tab: extraction are wrong?
Delta process: AIE After Images By Extractor (can't change that)
Direct Access: Allowd
real Time: Real-Time DA Supported
Adapter: realtime data extraction (also tried Access to SAP Data through Service API which seems senseless)
Data Format: Fixed Lenght
Anyone can explain what those fileds mean and which one i should use?
Edited by: Christoph Jender on Apr 10, 2008 2:48 PM
Edited by: Christoph Jender on Apr 10, 2008 3:33 PM

Hi again, another thing i'd like to try is to just active a business content datasource which is realtime-enabled and has the ability to dynamically add some values so that i can test if it works. but i have no idea what business content would be applicable here, any ideas on that perhaps?

RAC with real time knowledge

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