variable sharing, missing data, the timestamp even for two consecutively given

Hello

I have a problem with missing data when I read a published network shared variable.

Host VI:

In a host of VI on my laptop (HP with Windows XP Prof.) I write data to the shared Variable 'data '. Between two consecutively write operations is a minimum milliseconds of wait time. I use it because I want to make sure that the time stamp of each new value of data is different then a preview (variables shared the resolution is 1 ms)

VI target:

the VI target cRIO-9012 bed only of new data in the way that it compares the timestamp of a new value with the time stamp of the last value on a device in real time.

Problem:

rarely, I'm missing a data point (sometimes everything works fine for several hours, transfer thousands of data correctly above all of a sudden failure occurs). With a workaround, I'm able to catch the missing data. I discovered that the missing data have the timestamp exactly the same, then the last point of data read, is so ignored in my data 'legal '.

To summarize, the missed value is written to the variable shared host, but ignores the target because its timestamp is wrong, respectively the same as the last value, despite the host waits for a minimum of 10 milliseconds each time before writing a new value.

Note:

The shared Variable is hosted on the laptop and configured using buffering.

The example is simple only to display the function of principle, in real time, I also use a handshake and I guarantee that there is no sub - positive and negative.

Simplified example:

Question:

Anyone has an idea why two consecutively data can have the same timestamp?

Where timestamping (evil) Finally comes (System?)?

What would be a possible solution (for the moment with shared Variables)?

-> I tried to work around the problem with the clusters where each data gets a unique ID. It works but it is slower that comparing the timestamps and I could get performance problems.

It would change anything when I animate the shared on the RT System Variable?

Thanks for your help

Concerning

Reto

This problem has been resolved in LabVIEW 2010.  You can see other bugs corrections in theReadme of LabVIEW 2010.

Tags: NI Software

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    but # a statically compiled in mod_ssl.
    #
    < IfModule ssl_module >
    SSLRandomSeed startup builtin
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    < / IfModule >

    This is so for the app2 only configuration above, I am able to call and app1 his adage "404 page not found".

    Can soomebody help me cofiguring apache so that I can call the two applications.


    Thank you
    Ankit

    >

    WebLogicCluster 127.0.0.1:7005, 127.0.0.1:7007, 127.0.0.1:7003, 127.0.0.1:7103, 127.0.0.1:7104
    MatchExpression /app1


    SetHandler weblogic-Manager
    WebLogicCluster 127.0.0.1:7003, 127.0.0.1:7005, 127.0.0.1:7007, 127.0.0.1:7103, 127.0.0.1:7104

    DebugConfigInfo WE
    PathTrim /weblogic


    WebLogicCluster 127.0.0.1:7003, 127.0.0.1:7005, 127.0.0.1:7007
    MatchExpression /app2


    SetHandler weblogic-Manager
    WebLogicCluster 127.0.0.1:7003, 127.0.0.1:7005, 127.0.0.1:7007
    DebugConfigInfo WE
    PathTrim /weblogic

    >

    This configuration is a little weird. He has /app1 MatchExpression and MatchExpression /app2 and at the same time two sections . Are you sure you understand what means that the configuration?

    Try something like this...


    SetHandler weblogic-Manager
    WebLogicCluster 127.0.0.1:7003, 127.0.0.1:7005, 127.0.0.1:7007, 127.0.0.1:7103, 127.0.0.1:7104
    DebugConfigInfo WE


    SetHandler weblogic-Manager
    WebLogicCluster 127.0.0.1:7003, 127.0.0.1:7005, 127.0.0.1:7007
    DebugConfigInfo WE

    where /app1 and /app2 are your weblogic applications contexts.

    http://download.Oracle.com/docs/CD/E11035_01/WLS100/plugins/Apache.html
    http://httpd.Apache.org/docs/2.0/mod/core.html#location

  • export the schema, but for two tables, export only 20 rows

    11.2.0.2/RHEL 5.4

    Using expdp, I want to export an entire schema. But for the 2 large tables (say the EMP and DEPT tables) in this diagram, I want to export only 20 records (at random) for them. Is it possible for expdp and impdp?

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    Christian Christmas Pal Singh says:
    possible, but you must create two files dmp means export of run 2 times.
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    2. use the query clause to filter the data in the second export for these 2 tables.

    Really? is not something that similar work? instead of rownum, if you want truly random, then use example of clause, but it should be based on the amount of sample would make 20 lines for you, then a bit of work there.

    schemas=my_schema
    QUERY=my_schema.table1:"where rownum < 21"
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    Published by: rjamya on Sep 19, 2012 08:32

  • Plan of the hash value for two queries!

    Hello
    DB: Oracle 11g (11.2.0.3.0)
    OS: RHEL 5

    I have two question:

    1. can two queries have the same hash value of the plan? I mean I have here are two queries:

    SELECT /+ NO_MERGE * / MIN (payor.next_review_date). *
    * Payer from *.
    * WHERE payor.review_complete = 0 *.
    * AND payor.closing_date IS NULL *.
    * AND payor.patient_key = 10; *

    and

    SELECT MIN (payor.next_review_date)
    * Payer from *.
    * WHERE payor.review_complete = 0 *.
    * AND payor.closing_date IS NULL *.
    * AND payor.patient_key = 10; *

    When I tried to examine the execution plan for the two motions, the hash value of the plan remains the same. This means that implementation plan for both queries are same? If so, then how Oracle includes or changes to the execution plan based on hint. If not, then what hash value of the plan represents?

    2. If the plan with suspicion, and without suspicion is identical except for a given query except the number of lines and bytes. Do you mean this query with fewer lines and scanned bytes is better?

    Thanks in advance
    -Onkar

    >
    1. can two queries have the same hash value of the plan?
    >
    Yes - as already said - but it's not just because of tips.

    Here is the example code that I use to show that Oracle does NOT simply use a text version of the query that you propose and compute a hash of it.
    These two queries are radically different but have the same hash value; Oracle are not different at all.

    set serveroutput on
    set autotrace traceonly
    select * from DEPT A, EMP B
    where A.DEPTNO=B.DEPTNO
    
    SQL> select * from DEPT A, EMP B
      2  where A.DEPTNO=B.DEPTNO
      3  / 
    
    14 rows selected.
    
    Execution Plan
    ----------------------------------------------------------
    Plan hash value: 844388907
    
    select * from
    (select * from DEPT) A, (select * from EMP) B
    WHERE A.DEPTNO = B.DEPTNO
    
    SQL> select * from
      2  (select * from DEPT) A, (select * from EMP) B
      3  WHERE A.DEPTNO = B.DEPTNO
      4  / 
    
    14 rows selected.
    
    Execution Plan
    ----------------------------------------------------------
    Plan hash value: 844388907
    
  • I have the tab progress bar missing in the tabs, even with safe mode of loading. Why is this?

    Page loading progress bar should normally be displayed on tabs. I don't have it. With all active modules or in Safe Mode.

    I've upgraded to Firefox 4 from a previous version. I got Tab Mix Plus installed before provided FF4 a tab loading progress bar itself.

    After upgrading Firefox, I decided I didn't like the look of the new progress bar and it turns off in Tab Mix Plus. I disabled and deleted from Tab Mix Plus later, opting to use the utilities tab instead. Since I removed the Tab Mix Plus, tab load bars are missing.

    I tried to reinstall Tab Mix Plus, which makes progress bars to reappear... until I removed the TMP it's (without disabling the progress bar in TMP this time).

    Y at - it an option of chrome that I disabled because of Tab Mix Plus?

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    https://addons.Mozilla.org/firefox/addon/status-4-EVAR

  • Sticker missing with the product key for Vista

    I am in Europe and IV ' e just fresh installed copy of Windows Vista Home Premium I got another computer with key on this subject, but that key is maxed out on activation... so I'm in a little trouble here, got a few numbers in my another serial key and some are missing and others had to put my eye but can guess their how I have some or not all the figures for the barcode on the sticker with the license... How can I get the serial key full, I think it's really really frustrated if I have to buy me yet another copy of windows, I have a lot of XP series and so on, have need, I need this code, so I can upgrade my cpu to win 7... help please

    * original title - Hi, I had a problem, I don't see the serial key in the stick on my computr, I had X letter is missing, DDDDd-DDDDd-XXXXX-DDDDD-DELALANDRE... but I have several on the bardcode. !! *

    I am in Europe and IV ' e just fresh installed copy of Windows Vista Home Premium I got another computer with key on this subject, but that key is maxed out on activation... so I'm in a little trouble here, got a few numbers in my another serial key and some are missing and others had to put my eye but can guess their how I have some or not all the figures for the barcode on the sticker with the license... How can I get the serial key full, I think it's really really frustrated if I have to buy me yet another copy of windows, I have a lot of XP series and so on, have need, I need this code, so I can upgrade my cpu to win 7... help please

    Hey Bjarnikr

    If you have already reinstalled vista and you don't know the product key we can not help you

    If you had contacted these forums before you reinstalled vista we helped you with key finder programs

    but as this is a new installation of vista not activated we cannot help you find the product key

    If it is preinstalled, I suggest that you contact the manufacturer of your computer and ask them about recovery disks

    normally, they do not require you to select a product key when you use them to reinstall vista

    you don't say how you reinstalled vista

    and a vista license = a vista installation

    and the oem licenses cannot be transferred to another machine

    the retail license can be transferred, but that only one installation per license is allowed at any time

    Walter, the time zone traveller

  • Rufus (free utility) takes 2 minutes to create a USB bootable for ESXi installation starting source who becomes the target of the installation, even for 5.5

    Just info, one of these open Windows source rare beads that are becoming more and more difficult to find on the web these days, in the middle of a see payloads of downloader.

    Rufus I found to be very convenient for the quick creation of a USB flash drive you can start from, and then only install, for ESXi, no command-line stuff to memorize necessary and very fast:

    TinkerTry.com/rufus-takes-2-minutes-to-create-a-bootable-usb-flash-drive-for-esxi-installation

    works very well with ESXi 5.5 also:

    TinkerTry.com/download-vsphere-5-lab

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    Documentation Centre of vSphere 5.5

    Windows diskpart commands or potentially dangerous. Really fair, fast and useful for pretty much everyone.

    Thoughts and opinions?

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  • Please help me with the Alternative of queries to replace the UNION ALL for two queries

    Hi all

    I have the query to retrieve assets employees salary count and in so far as below:

    Select ename, emp_no, sum (sal_till_2010), sum (sal_till_2014) of

    (select emp_no, ename, salary as sal_till_2010, 0 as sal_till_2014 of employee e1

    where effective_date < = 1 January 2010 ' and not exists (select 1 from e2 employee_deletion where e2.emp_no = e1.emp_no and e2.deletion_date < = January 1, 2010 "")

    UNION ALL

    Select ename, emp_no, 0 as sal_till_2010, salary as employee e1 sal_till_2014 - here is a dummy 0 salary until 2010 for the union of all the

    where effective_date < = 1 January 2014 "and not exists (select 1 from e2 employee_deletion where e2.emp_no = e1.emp_no and e2.deletion_date < = 1 January 2014") "

    Group of emp_no, ename;

    In this query, I get the total salary until 2010 and until 2014 in the employee table, dates are dynamically passed to the procedure, and this can change.

    But assume the date above and let me know the alternative of queries to improve performance because I use Union ALL and read the same table twice in the above query.

    Advice me with request to read the table once to fetch the same data as the above query.

    Thanks in advance.


    Hello

    Thanks for the display of the data of the sample; It's very useful!

    I think OP wants something like this:

    WITH cutoff_dates AS

    (

    SELECT TO_DATE (January 1, 2010 ', ' DD/MM/YYYY') AS cutoff_date, 2010 UNDER the label OF dual UNION ALL

    SELECT TO_DATE (1 January 2014 ', "DD/MM/YYYY"), double 2014

    )

    SELECT e.emp_no, e.ename

    , NVL (SUM (CASE WHEN c.label = 2010 THEN e.salary END), 0) AS sal_till_2010

    , NVL (SUM (CASE WHEN c.label = 2014 THEN e.salary END), 0) AS sal_till_2014

    E employee

    JOIN cutoff_dates c ON e.effective_date<=>

    WHERE DOES NOT EXIST)

    SELECT 1

    Of employee_deletion ed

    WHERE ed.emp_no = e.emp_no

    AND ed.deletion_date<=>

    )

    E.emp_no GROUP, e.ename

    ORDER BY e.emp_no

    ;

    Output of your sample data:

    EMP_NO ENAME SAL_TILL_2010 SAL_TILL_2014

    ---------- ------ ------------- -------------

    1 Mickey 450 0

    2 Donald 750 0

  • I'll be able to use the Apple Watch for two weeks before the arrival of my new iPhone?

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    Hello

    No, I'm afraid not - you only will be able to set up your Apple Watch after having coupled with your iPhone.

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