NFC tags low level read/write operations

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• Oracle coherence first read/write operation take longer

  I'm testing with consistency oracle Java and C++ version and both versions for writing in a local or distributed or near cache first read/write operation take more time compared to the next consecutive read/write operation. What is because of boost operations inside real HashMap serialization or memory mapped implementation. What are the techniques that we can use to improve performance with this first read/write operation?
  
  I'm doing a read operation / written after extraction of the NamedCache Instance. Please let me know if there is any what other stimulant coherence cache of available techniques.

  In that case, why bother with consistency? You're not really winning anything, are you?

  What I'm trying to explain, is that you're probably not going to get this level of performance 'microsecond' on a consistent cluster configuration, running on multiple computers, passes through proxies for clients c ++. Consistency is designed to be a scalable, tolerant cache/processing system and distributed. It is not really designed for real-time, guaranteed processing, micro-nano-second second level. There are much better batteries product out there for this type of treatment if that's your ultimate goal, in my humble OPINION.

  As you say, simply write a small local map (or an array, list, Set, etc.) in a local JVM is always going to be very fast - literally as fast as the processor running on the computer. But this isn't really the development of a product like the consistency. It does not seek to "get the gun" that you can get on a single machine, perform simple processing; Consistency is designed for scalability rather than outright performance. Of course, the use of the local caches (including coherence near caching or replicated caching), can you put some of the performance you ' lost ' in a distributed system, but everything is relative.

  If you wander on some of CUG presentations and attend a few meetings CLOSED user group, one of the first things the support guys will tell you is "spots on a correct cluster' and not 'on a localized development computer. Why? Because the difference in performance and scalability will be huge. I'm not really looking to dissuade you from consistency, but I don't think that it will meet you needs when fully configured in a cluster of "1 Micro seconds for 100000 data collection" on an ongoing basis.

  Just my two cents.

  See you soon,.

  Steve

  NB. I do not work for Oracle, so maybe they have a different opinion. :)

• The control law of read/write FPGA on the loop of the root / the UI thread?

  Hi all

  As the title suggests, the read/write control FPGA, https://zone.ni.com/reference/en-XX/help/371599H-01/lvfpgahost/readwrite_control/, is on the loop of the root / the UI thread?

  Watch, https://zone.ni.com/reference/en-XX/help/371361J-01/lvconcepts/multitasking_in_labview/, this would indicate as that, but I would get a good response.

  Kind regards

  David

  While I'm not 100% if it acts on the loop of the root / UI thread - calls to the FPGA (e.g. control of read/write operations FIFO) block permanently. I remember having a weird problem in the past where my FPGA operations have been suspended because I was expecting given FIFO elsewhere.

  You should be able to test this easily enough - try to open a file dialog during playback of your FPGA. If playback crashes while the dialog is open, you have a loop of root problem.

• Effective use of the FPGA read/write

  I am writing an application for a CompactRIO real-time and I am looking for ways to simplify my code and reduce the CPU usage. I use FPGA to do much CAN e-mail and signal processing, then I have a VI running on the real-time processor that reads values in the FPGA, does some processing and outputs data in the FPGA. My code running on real-time parallel uses several loops running in a master/slave architecture. A single loop reads all necessary information in the FPGA in indicators and writes the values of the controls in the FPGA. The other loops read entries and manipulate the outputs via local variables.

  My question if it would be more effective to get rid of the loop which is dedicated to the communication of FPGA and has of each loop to read and write directly on the FPGA. If I use a reference block FPGA open and use the reference of the output in several loops, each read/write operation block others until it's over? Each output is changed only in one place in the code, but there are several entries that are used by multiple loops. It is even more effective for each loop of read/write for the FPGA on request? How will this affect determinism?

  Thank you

  Jon

  Jon,

  Read/write controls is not deterministic, but I think that your previous method should work just fine, as long as you have that unique writers. If you have multiple writers, you start affected by race conditions.

  I don't think you will see a significant improvement in the performance/CPU in the alternative method. You would see big performance gains if your master loop reads more slowly indeed, but it's always a compromise.

• Could not read a DVD after the write operation

  Using windows XP sp3.

  I burned a dvd with nero data disc 9 esentials and then couldn't read or any other disk.

  Tried the disc in my computer vista laptop and it read fine.

  DMA is enabled.

  After a lot of noise, I restarted my computer xp and it will now play dvd's and discs again.

  I noticed that there are several entries in the device for ide primary and secondary Manager.

  Here is a link to the screenshot:

  http://AG1.dnsalias.com/photo/devicemanager.bmp

  Could be the problem?

  Now, I think that the problem may be due to the Nero 9 Essentials program if you close the program immediately after the write operation instead of clicking next and then closing. Thanks for your help.

• error - operation of menu not valid and a lower-level exception occurred in ImportMPEG (importer) how can I fix this?

  When I export a file in Adobe Premiere Pro, I get the error: operation of menu invalid and a lower-level exception occurred in ImportMPEG (importer) how can I fix this?

  I am running Windows 8.1 Pro, Intel Core i7 - 5930K @ 3.50 GHz CPU

  RAM - 16 GB

  Adobe Premiere Pro CC 2015

• Read/write rules: generics & Tags FM identifiers

  I've seen this question answered in one of the guides dev but I can't find him.

  My question is if it's legal in read/write rules to designate different generic identifiers on the same FM/element tag.

  For example:

  "body' element is fm"paragraph. "

  element 'preface' is fm "paragraph."

  Thank you!

  [transferred to the structured forum FM]

  Each structured document fm does need an earlier XML document?

  N ° it depends on the application. In my case, I create the user using FrameMaker structured manuals. Our editorial team created a DSP that does what we want and need to do. We do not export or save FrameMaker files structured in XML. However, we could if necessary, for example, to create versions in HTML for display in a browser. This application works for our needs.

  I have only one application in which I start with XML. When I create a spare parts catalog, the information in the part are exported from a database in XML format. The structure of this XML file is determined by the database; It does not match the structure design in my EDD. But I use an XSL transformation to convert the XML elements in a structure that is valid with respect to my EDD. Again, this depends on your application.

  Some people export their FrameMaker files structured to XML. Maybe they want to do something else with the content that requires it to be in XML format. Or they can use XML for storage, because the XML files are smaller than the FrameMaker files. Then, when they open the XML files in FrameMaker, they are imported into its own model, which cleans the substitutions and no junk which may have accumulated in the FrameMaker files.

  If your goal is to convert the unstructured files structured FrameMaker files, then I suggest focusing on the development of ESD that works for your needs. Export to XML may come later if you need it.

  Van

• Question/problem of low-level Stadium

  Hello

  As I understand it, the image of low level scene should display when an Edge animation is displayed in a browser with Javascript disabled.

  If that is correct, then it does not work for me, either in the preview in the edge browser animate, or when he published and used a site built with Muse.

  Tested with IE 9, 16.01 FF, Opera 12.02 w / JS disabled.  In all cases, neither animation nor the poster is displayed.

  Yes, I read the answers to the message of Vancouver Joel re: "low level does not work" to

  http://forums.Adobe.com/message/4730549#4730549

  but here, anything.

  My animation film is very simple; It just uses native ellipses, text using arial fonts, nothing special.

  The image of the poster I selected is present when I inspect the stage of low level.

  Same problem occurs with a more complex animation.

  Any ideas?

  Thank you!

  Hey wbaafs, the phase at a lower level will not appear with JS disabled because it requires searching for information on the preloader.js file. However, you can manually mak your own rescue using the noscript tag:

  Sarah

• Big against little endian - how will this affect my Performance of read/write PDM

  Hello

  I read that LABVIEW intrinsically stores data in big endian format, but the read/write of the VIs DDHN have the little-endian as a default. Simply, you wonder what is recommended for these screws TDMS and if these options affect writing / reading performance somehow?

  Hello

  The endian of data does not affect the performance of the read/write of the DDHN screw the primacy of the format is just down to personal preference when working low level with data.

  If you do not read or write the bits in a personalized way, then I would recommend leaving the endian as it is by default when reading or writing. Otherwise, use any kind you like or prefer to go through.

• Feature SoftMotion Straight Line move read/write Targ Pos

  I read up to / study code on the packaging SoftMotion example of OR.

  I downloaded the code 'NOR week 2008 SoftMotion Development Module 2.1 and Compact 6-axis coordinated Motion Demo RIO' to discuss how I can implement a routine of homing on motor axes stepper and ran through a code without papers.

  I note that property to move to right Linr Targ Pos RW (target Position) can take in a meter target or the target tables.  The detailed help for this node does not detail the difference in operation.

  From what I can decipher, it seems that the table entry is for when you have mapped to several lines of a 'coordination' and the entry in table defines the position of the target for the individual axes in the coordinate.

  Is this true?

  Hi Rvallieu, you are right. It is the function that the table has. If you configure the system to work with multiple axes, the Position of the target of the right line to move read/write will have an entry level. This is something that should be mentioned in the help. This was reported to R & D (# 133028) for further investigations.

• How to give read, write permission to the directory from one user to another user in oracle 10g

  Hello

  I have a database in two. key is the source database and Board of Directors is the target database. Now I want a (single) create these two database directory to put the dump file. How can he give permission to READ, WRITE access to this directory both of database? Someone help me.

  Hello

  I think that first create a level of operating system directory, and then try Mr.Kar k steps

  OF DATABASE1 (KEY)

  SQL >dir1 CREATE or REPLACE a DIRECTORY as "/ opt/oracle / ';

  SQL >GRANT READ, WRITE on dir1 to the PUBLIC; (if you want to give access to all users then give public access)

  SQL >GRANT READ, WRITE on rep1 to ; (if you want to give access to the particular user)

  OF BASE2 (COUNCIL)

  SQL >CREATE Or REPLACE rep1 as DIRECTORY "/ opt/oracle / ';

  SQL >GRANT READ, WRITE on dir1 to the PUBLIC; (if you want to give access to all users then give public access)

  SQL >GRANT READ, WRITE on rep1 to ; (if you want to give access to the particular user)

• ORA-27070: async read/write failed

  Hello
  10 g R2 on Win server 2008 my faile overlap RMAN backups when:

  run
  10> {
  11>      allocate channel t3 type disk;
  12>      backup as compressed backupset format '\\ASERVER\SAV-DAT\RMAN\INCR\MYDB\df_%d_%T_%s_%p' INCREMENTAL LEVEL 1 database;
  13>      sql 'alter system switch logfile';
  14>      backup as compressed backupset format '\\ASERVER\SAV-DAT\RMAN\INCR\MYDB\al_%d_%T_%s_%p' archivelog all delete input;
  15>      backup as compressed backupset format '\\ASERVER\SAV-DAT\RMAN\INCR\MYDB\ctl_%d_%T_%s_%p' current controlfile;
  16> }
  17> host "DIR \\ASERVER\SAV-DAT\RMAN\FULL\MYDB\DF_MYDB*";
  18> crosscheck backup;
  19> delete obsolete;
  20> delete expired backup of database;
  21> 
  22>   
  Finished backup at 01-SEP-10
  
  Starting backup at 01-SEP-10
  channel t3: starting compressed full datafile backupset
  channel t3: specifying datafile(s) in backupset
  including current control file in backupset
  channel t3: starting piece 1 at 01-SEP-10
  channel t3: finished piece 1 at 01-SEP-10
  piece handle=\\ASERVER\SAV-DAT\RMAN\INCR\MYDB\CTL_MYDB_20100901_98_1 tag=TAG20100901T205836 comment=NONE
  channel t3: backup set complete, elapsed time: 00:00:03
  Finished backup at 01-SEP-10
  released channel: t3
  
  host command complete
  
  allocated channel: ORA_DISK_1
  channel ORA_DISK_1: sid=103 devtype=DISK
  RMAN-00571: ===========================================================
  RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
  RMAN-00571: ===========================================================
  RMAN-03009: failure of crosscheck command on ORA_DISK_1 channel at 09/01/2010 20:59:58
  ORA-19501: read error on file "\\ASERVER\SAV-DAT\RMAN\FULL\MYDB\DF_MYDB_20100825_22_1", blockno 1 (blocksize=8192)
  ORA-27070: async read/write failed
  OSD-04016: Error queuing an asynchronous I/O request.
  O/S-Error: (OS 64) Net Work name unavailaible
  ORA-19501: read error on file "\\ASERVER\SAV-DAT\RMAN\FULL\MYDB\DF_MYDB_20100825_22_1", blockno 256 (blocksize=8192)
  ORA-27070: async read/write failed
  OSD-04016: Error queuing an asynchronous I/O request.
  
  Recovery Manager complete.

  As yo see RMAN backup finishes but defective during overlap. The file is available and can be connected to the CARRYING by RMAN to write the file. Why can't it overlaps?
  
  Thank you.

  Why can't it overlaps?

  S/O-error: name of Net work (OS 64) unavailaible

• Re: Satellite X 200: Vista restore after format low-level HARD drive

  Hello

  I would like to know if the CD of my Satellite X 200 recovery tools is able to restore my drive after a low-level format?

  Waiting for them, thanks a lot.

  Hello

  The use of the Toshiba Recovery CD would be to format the whole HARD drive and to relocate again the entire image of Toshiba.
  This means that all the operating system Windows Vista, Toshiba drivers, tools and additional software would be installed on your HARD drive 200 X.

  I hope this is the information that you need.

• Suspension of a write operation to DAQmx

  Hi all

  I use a DAQmx with the cards NI9402 and 9264 to control current amplifiers for an MRI System. I intend to do using a waveform table raised on channel 3 of the NI9402 (high-speed digital input).

  The difficult part is I need to pause the write operation once a given number of points was written until the digital signal is reset, how the rest of the buffer can be written.

  I'm not satisfied with my current solution because it is ugly and is rather slow. There is a minimum of 70 ms between the operations of two scripts, which is not acceptable. I need a minimum waiting period of 10 ms.

  I'm not familiar with Labview, but I think there may be a way to use the clock for this signal? Unless someone sees a better way to proceed?

  All the best,

  Lionel

  Hey Lionel,.

  I thought of a way to do this completely in hardware.  You will need two counters embedded chassis cDAQ, 4 channels of your outdoor wiring 9402, and some (including a BNC T so that it works well).  I briefly checked that this method works, but I have probably not thought through every possible corner cases.  My code works as follows:

  1. Set up a finished counter of output to generate samples N, where N is the number of samples to produce after the initial rising edge of the trigger signal.  Out of this train of pulses on channel 9402 0 (PFI 0).  This task is to use the amount of 9402 channel 3 flank (PFI 3) as a starting signal.
  
  
  2. Set up a different output over counter to generate samples of M, where M is the number of samples to produce after the trigger signal goes low return (total of samples or less N).  Out of this on the 9402 1 channel pulse train (PFI 1).  This task should use the edge falling from 9402 channel 3 (PFI 3) as a starting signal.
  
  
  3. Using a BNC T, combine the PFI 0 and outputs 1 IFP then their thread 9402 channel 2 (PFI 2).
  
  
  4. For your analog output task, use a value over production task generate N + M samples with the clock set to PFI2 sample source.

  I tested it with an SMU-6363, assign a sinusoid point 4000 to 1 ms/s output.  With N the 2567 value and the value of 1433 M, I got the following result.  I can change the values of N and M, and it still works well.

  

  I post my code, but honestly, I just did some quick changes to the over voltage output – over output and Counter – expedition of the examples (under DAQmx in the Finder of the example), so I don't know how much value he would add.  Let me know if you have any questions well, or if this is not possible for some reason any.

• Dynamic screen low level Sub vi high-level VI main road

  I have a program VI that inturns calls a lot under vi mode step by step. I need to display the path of lowest level vi in the top level vi main. (here in my program, I have 3 levels of void / vi) and I need the path least void level vi to be disaplyed on the façade of the main vi (constraint: I should not hardcode the path), the time particular VI is selected. The other constraint is that the path must be posted before the sub vi runs, (reason: I need to get the path before, dynamically, such that I can view the slot front of the vi in the main vi Panel pane Panel) the raison d'etre to display exectuion of lowest level under vi... Y at - it an option in Lab mode that allows this feature. I also tried reference variable, but it displays only after that the VI is completely executed. Help, please! Thank you..

  I wrote code examples to explain what I meant in the previous post.

  

  The only catch is that you must know the name of the Subvi low level before you run the highest level Subvi.

  If this isn't the case, you might get away with reading the name of the Sub - VI low level of an indicator of the (default) string at the edge of the Subvi toplevel Panel using 'get command value' invoke node or something.

  I hope this helps.