Best way of logging data on a cRIO?

Hi All,
I have a cRIO 9073. I want to log measurements periodically to onboard non volatile storage then have an external PC periodically pull these values from the device. What's the best way of achieving this?
Thanks,
Sean

From the application you will see the nonvolatile RAM as drive C:\. Store the date there.
Normally an FTP server is running on all LV-RT systems. So you can use any FTP Client program (Windows Explorer is one of it) to get the files.
There are FTP packes available on the marktet who can do periodic jobs either by using the Task Sheduler from Windows or with an own task sheduler.
Waldemar
Using 7.1.1, 8.5.1, 8.6.1, 2009 on XP and RT
Don't forget to give Kudos to good answers and/or questions

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Best way to log data

I have an application that receives data from a source, and I would
like to create and maintain a log file with this data. Small bits of
data will be received at least every minute, and often once every
second. The user can also view the logged data at any time.
Lastly, each entry is timestamped, and I would like to be able to
remove log entries that are x hour/days old.
What I would like advice on is what is the bext way to accomplish this?
Clearly a bad way to do this is every time I get data, read the log in,
remove old entries, rewrite all the remaining entries, and finally
append the new entry. This uses way too many file operations.
I have briefly looked at the java.util.logging stuff, but it appears that
the purpose of that is more for code debugging/etc. It also doesn't
appear that there are methods to read the logs. So, this does not
look like an "easy way out".
I know how to append to a file, but I am not sure if I should leave
the file open during execution of the program and simply flush
the stream/buffer, or open and close the file everytime I write.
The latter is clearly more expensive, but safer.
I don't know how to delete data from the beginning of a file.
To summarize, what is the best way to read and write data to
a file such that:
1) the data is appended to the end of the file (easy)
2) the data is removed from the beginning of the file
3) the data that is written is not lost of the program crashes/etc.
4) the whole logging business is not too expensive
Any suggestions?
Thanks,
Chuck.

Here's what we did at my last job:
Incoming messages are logged to disk via FileOutputStream (maybe with BufferedOutputStream encasing that, I don't remember) this outputstream is not closed until the applet is stopped. System.out is also reassigned to this fileoutputstream to capture all messages.
At the same time, there is an InputStream reading from that file. As data is read, we stick the text into a TextArea.
When the TextArea size hits some certain amount (maybe 20,000 characters) we'd remove ... maybe 5000 from the top. Log stays the same tho
When the day rolls over, we switch log files
You're questions:
1) the data is appended to the end of the file (easy)
Yes. But if you're not using streams, you should check that out.
2) the data is removed from the beginning of the file
That's pretty easy. Open the file for reading, open a new file for writing. Read the first n bytes but don't write them. Then write the rest
3) the data that is written is not lost of the program crashes/etc.
Data should be fine if it's logged to disk
4) the whole logging business is not too expensive
Saving to disk isn't very expensive at all. In fact, normally writing to disk is slow enough that stuff just gets put into a buffer somewhere to get sent to the disk and the processor goes on with the program.

Best ways to view data, total records of an application table ie VBAK

Hi all,
What is the best way to view data of an application table in the source system?
I know about SE16....but are there other ways to know details ie the total no of records and different field information about a
application table ie VBAK in source R3?
Also, using SE16 when i checked for VBAK and clicked on the "number of enteries" then it showed 0...however
when i directly checked from the sqlplus then i found about 5000 records in there in VBAK. I am not sure why
via SE16 it showed 0. Does anybody have any idea what i missed here?
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ak

I tried "number of enteried" on se16 and it shows 0 enteries without any selection criterion...i cheked by putting relevant time range as well but it shows 0...
As i told that when i checked VBAK separately via logging to database directly then i did find 5678 rows there.
Please note that this is a new demo version....so i thought that i first need to activate the table which i did using tcode SE11. Now the VBAK table is active but still via SE16 shows 0 nuber of enteris....
Can anybody please advise here..
Thx
ak

How is the best way to read data from an iphone if you lost your itunes data after a crash?

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Best way to import data to multiple tables in oracle d.b from sql server

HI All am newbie to Oracle,
What is the Best way to import data to multiple tables in Oracle Data base from sql server?
1)linked server?
2)ssis ?
If possible share me the query to done this task using Linked server?
Regards,
KoteRavindra.

check:
http://www.mssqltips.com/sqlservertip/2011/export-sql-server-data-to-oracle-using-ssis/
      koteravindra
Handle:      koteravindra
Status Level:      Newbie
Registered:      Jan 9, 2013
Total Posts:      4
Total Questions:      3 (3 unresolved)
why so many unresolved questions? Remember to close your threads marking them as answered.

What could be the best way to Export data from 11.5.8 instance to 12.1.2?

Hi All
What could be the best way to Export data from 11.5.8 instance to 12.1.2?
Release: 11.5.8
OS: Oracle Solaris on SPARC (32-bit) verison 9
DB: 9.2.0.1
Thanks in advance

What kind of data you are looking to move?
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You can move the setup using iSetup or FNDLOAD.
Thanks,
Hussein

What is the best way to transfer data from a PC to an iMac?

What is the best way to transfer data from a PC to an iMac?

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Best way to export data with r.t. prompts and have dense dim mbrs on rows?

Hi All-
What is the best way to export data with Run time prompts out of Essbase?
One thought was to use Business Rules with run time variables and DATAEXPORT command, but I came across at least one limitation where I cannot have months (part of dense Time Periods dimension) on rows.
I have only two dense dimensions: Accounts and Time Periods and I need both of these on rows. This would come handy when user enter Start and End month and year for data to be exported e.g. If start period is Feb 2010 and end is Jan 2011, I get data for all months in 2010 and 2011.
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000",14202.24,14341.62,14560,13557.54,11711.92,10261.58,12540.31,15307.83,16232.88,17054.62,18121.76,18236
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000",19241,21372.84,21008.4,18952.75,23442.13,19938.18,22689.61,23729.29,22807.48,23365,23915.3,24253
"CORP1","0173","FY11","Working","Budget","Local","HSP_InputValue","404000",21364,22970.37,23186,27302,25144.38,27847.91,27632.11,29007.39,24749.42,27183.39,26599,27112.79
where ideally I would need to get the following:
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"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","Mar",14560
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","Apr",13557.54
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","May",11711.92
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","Jun",10261.58
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","Jul",12540.31
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","Aug",15307.83
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","Sep",16232.88
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","Oct",17054.62
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","Nov",18121.76
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","402000","Dec",18236
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Feb",21372.84
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Mar",21008.4,
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Apr",18952.75
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","May",23442.13
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Jun",19938.18
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Jul",22689.61
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Aug",23729.29
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Sep",22807.48
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Oct",23365
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Nov",23915.3
"CORP1","0173","FY10","Working","Budget","Local","HSP_InputValue","403000","Dec",24253
"CORP1","0173","FY11","Working","Budget","Local","HSP_InputValue","404000","Jan",21364
Thank you in advance for any tips.

Have a read of the following post :- export data to sql
It may give you a further option.
Cheers
John
http://john-goodwin.blogspot.com/

Best way to read data sources in parallel

Hi,
I'm looking for conceptual help as I start a project. I am trying to figure out the best way to get data from several sources at different timings and deliver them to a main vi.
I have 4 systems, which each work well on their own (OK, one doesn't work yet, but let's assume that can be fixed
One system reads from 2 pH meters on serial ports. The meters are slow to respond, so it takes about 2 minutes to read 4 channels of data. I save these data to a file every 10 minutes
One system reads from a CO2 meter on the USB port. It reads the data every second, and does some averaging. Every 2-10 minutes, it saves the average to a file and then sends a command to the parallel port to switch the input to the meter.
The third system reads from 6 valves, each on a serial port. These also take time, probably several minutes to poll all 6. These data will also be saved to a file.
The 4th system reads a bank of temperature probes on the USB port. These get polled every few seconds and saved to a file every few minutes.
Now that these individual routines are working, I am trying to create a front end that will display all the data in one place and allow me to set all the parameters from a single place. I would also like the possibility of using the data from one source at another place (for instance, having the output of the temperature probes sent to the pH meters to adjust their calibration). At this point, I get confused as to the best way to proceed.
It seems like if I just want to read the data from each source, I could simply put all 4 routines together in a single vi (oh, what a mess that would be to read). Maybe I should start this way?
However, if I want to have any communication between the different data sources, it seems like I will either need to use queues or VI server. I sort of envision a vi that lets me configure the various ports and the file operations and then can turn on monitoring of any or all of the various inputs. Each of them will do their thing at their own time and the main routine will simply display whatever data they deliver whenever they have new data. Fortunately, nothing is particularly time-critical, nor does it need to run fast.
My questions: Am I correct in how I'm thinking about getting this to work? Is there a clear choice between queues or vi server? I've looked at several examples of each, but without having done something like this before, it is hard for me to tell which is better.
Thanks for any suggestions.
mike

Hi Mike,
I think that you are on the right track with your thinking process. You might be able to implement this using queues. I'm not exactly sure how you would do it with VI server since it is just a set of functions that allows you to dynamically control front panel objects, VIs, and the LabVIEW environment. However, there are some great resources available with using queues for this type of application. I'm including the link to another discussion forum that had a very similar question to yours. There is a good example of using queues within this forum post. Also, there is a great example in NI Developer Zone about using queues and some other good ones in the NI Example Finder (just search 'queues' and you should get a few results). I hope this helps!
Carla
National Instruments
Applications Engineer

Best way to pass data sets to another program

Hey
I want to connect another (maths) program with my java application. Therefore I need to paste data (some kind of tab separated table) to this program.
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I have partitioning by Hash on a Large Table of 5 TB. We have to load Data say more than 500GB daily on that table from ETL.
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Best way to mark data that has changed when it is edited in a spark datagrid?

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Hello Experts,
Can anyone tell me best way to extract data from archived cube.
Basically I am trying to pull all the data from archived cube and then load it into another brand new infoprovider which is in different box.
Also I need to extract all the master data for all infoobjects.
I have two options in my mind:
1) Use open hub destination
or
2) Infoprovider>display data>select the fields and download the data.
Is it really possible to extract data using option (2) if records are too high and then load it into another infoprovider in new system.
Please suggest me the pros and cons for the two options.
Thanks for your time in advance.

Hello Reddy,
Thanks a lot for your quick reply.
Actually in my case I am trying to extract archived infocube data and then load it into new infoprovider which is in different system. If I have connectivity I can simply export data source from archived infocube and then reload into new infoprovider.
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Thanks
Edited by: saptrain on Mar 12, 2010 6:13 AM

Best way to export data for a migration

Hi Oracle Community,
What's the best way to export data from an Oracle 8i database for it to be suitable for import into an Oracle 10g database?
What's the best way to export data if it is to go into different rdbms database?
Thanks, David

Thanks everyone for all your help. You guys are great.
There seems to be many good ways to export your data from Oracle into a flat file format, suitable for import into other RDBS': Oracle, mysql, postgresql, etc.
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<tablename>.def # list of table columns and types (SQL*Plus DESC)
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Best way of logging data on a cRIO?

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