Multiple database connections

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• Applications of multiple simultaneous connection with invalid password saturates the UDP ports and can lower the infrastructure of database 11g.

  Problem statement:

  
  

  Multiple simultaneous connection requests with invalid password saturates the UDP ports and can bring down the 11 GR 2 (11.2.0.4) database infrastructure.

  
  

  When the API try to put applications that is not able to connect and DB is still suspended as long and we restarted to solve the problem.

  
  

  So, I'm curious to know if a fix is available for this problem without having to restart the database.
  

  Multiple simultaneous connection requests with an invalid password

  Have you tried to use the password?

  can lower the 11 GR 2 (11.2.0.4) database infrastructure.

  I have to say that I am skeptical about this claim. I didn't know the database or the listener down due to attempts to connect not valid. Can you give us an error message or two confirming this?

  The right course of action is to use the correct password in the application.

  See you soon,.
  Brian

• Dblink Oracle to sql server, multiple database on the same server sql under a dblink

  Hi, we managed to set up an Oracle dblink to sql server and retrieve data.

  The user of sql server have been using via dblink has access to multiple databases on the same sql server

  But the question is how in oracle (if possible) prepend you the SQL access to this?

  For example:

  Sqlserver_prod has the user sqlserver_user which seems to be set up as default database sqlserver_db1

  But we have select access to sqlserver_db2

  all work well as sqlserver_user

  Select * from table_fromdb1

  Select * from dbo.table_fromdb1

  Select * from sqlserver_db1.dbo.table_fromdb1

  as does

  Select * from sqlserver_db2.dbo.table_fromdb2

  more in Oracle

  Oracle_db a dblink sqlserver_prod. World connection sqlserver_user

  everything works fine

  Select * from 'table_fromdb1"@sqlserver_prod '.

  Select * from 'dbo '. "table_fromdb1"@sqlserver_prod

  But how to (if possible) access from oracle

  sqlserver_db2.dbo.table_fromdb2

  without having to create a new sqlserver_db2_user referenced in a new dblink

  If oracle for oracle would be

  Select * from remote_oracle_schema.table@remote_oracle_db

  Hello

  You cannot select a table in a different SQL * database server from that to which the gateway instance connects.
  As stated in the documentation-

  Oracle® database gateway

  Installation and Configuration Guide

  11g Release 2 (11.2) for AIX 5 L Based Systems (64-bit), HP - UX

  Itanium, Solaris (SPARC 64-Bit), Linux x 86 operating system,

  and Linux x 86-64

  In the section.

  The example SQL Server multiple databases: Configuration of the modem router

  A separate instance of the gateway that is required for each SQL Server database. Each

  instance needs its own Gateway system ID (SID).

  ==========

  You will need to create a new instance of the gateway for the SQL * Server DB2 as well as a link separate db.

  Kind regards

  Mike

• Start up problem when having multiple databases on the machine

  Start up problem when having multiple databases on the machine:
  
  I installed two databases.
  
  When I stop the database and try to start using
  
  Startup pfile ='... location... " ;
  
  I get ora-12514: TNS: listener is not currently know of service rquirest in connect descriptor
  
  When I try again after 3 seconds, I get a new error, ora-01041: internal error. Hostdef extension doesn't exist
  
  Stop and start gave no problems when I had a database. Why I get problems when I have two databases?
  
  I use: show the pfile parameter. SPFile; to make sure that I have the right parameter locations, the error should not be the location.
  
  I never installed two databases on a single machine, then perhaps that I make mistake of a first - timer.
  
  Anyone know how to get this working, i.e. start and stop DB without problems?
  
  The oracle 11 GR 2 on Windows 7 64 bit, everything works normally.
  
  Thank you
  Ayman
  
  Published by: aymanzone on June 15, 2011 09:27

  aymanzone wrote:
  My oracle_sid is set to the name of one of my databases

  echo % oracle_sid %

  shows me the name of my first database.

  Still does not.

  When I start the services of two databases by using Services, I can connect and run queries both the database.

  Published by: aymanzone on June 15, 2011 11:47

  First of all... the Oracle Service for the instance must be started for the DB that you try to connect or start.
  Next... from the command prompt:

  Set oracle_sid =

  sqlplus sys as sysdba

  Startup pfile = 'location of the pfile respective db.

  Now, if you want to start or connect to another DB, which is on the same server (again assuming that the Service is STARTED)...
  From the same command prompt or other session...

  Set oracle_sid =

  sqlplus sys as sysdba

  Startup pfile = 'location of the pfile respective db.

  Published by: Srikanth on June 16, 2011 12:27 AM

• Multiple database servers question

  Hello
  
  Forgive me this ignorant question, but can anyone tell
  me how we could go on the use of multiple database servers?
  
  Just as there comes a time where we could use more of
  Server a web and would need to use a load balancing
  solution, what happens when we'd need more than one
  Database server?
  
  How should be done on the implementation of this solution?
  
  Is it possible to have two servers with database the
  same information with a kind of load balancing solution
  in front of it (?) or did a place a few tables in a database
  Server and other tables in the other database server?
  (I have no idea as to how would things.)
  
  
  Thanks in advance,
  
  
  Joe
  
  

  Microsoft SQL allows clusters of SQL databases, so for example two servers connected to a fileshare and a shared virtual address between two physical boxes. Database connections are made to the virtual address which will be then handled by the active node. Because a database is a file (s) on a disk, it can be attached only to a single node at a time if you end up with a cluster of active/inactive.

• Database connectivity Kit

  Hello

  I use the database connectivity toolkit to create a Microsoft access database.  I'm new to the Toolbox.  I've read the tutorials online and following the instructions.  I created an empty Microsoft Access file with an .mdb extension.  I also created a link to data .udl with tools > create data... in LabView and linked to the mdb file.  My code VI is attached.  I get the following error when I run the program (also attached).  I don't know what causes this error.  I appreciate your help.

  Thank you

  You can not create a table with the name "table".  It is a key word.

• Reading large data using the database connectivity

  Hello

  I use the Labview database connectivity toolkit to connect to my database sqlitev3 (I'm using ODBC). I just have to connect to the database (using the block of open_connection) and read all the values inside (using the select_data block). The problem is that my database is huge (about 2 GB), and I get this error:

  . VI NI_Database_API.lvlib:Rec FETCH Recordset Data (R)-> NI_Database_API.lvlibB Tools Select Data.vi-> real_web.vi-> real_web.vi.ProxyCallerADO error: 0x8007000E Exception occurred in provider: not enough memory is available to complete this operation. in .vi NI_Database_API.lvlib:Rec Fetch Recordset Data (R)-> NI_Database_API.lvlibB Tools Select Data.vi-> real_web.vi-> real_web.vi.ProxyCaller

  What should I do? It seems that he reads the data in the memory and it doesn't have enough space for it. When I read the data I want to write to a file.

  

  Read it in pieces. Write each piece to the file, and then repeat with the next segment. Try to read and process all data in one shot is not very practical and you found out will not work.

• problem to generate an installation program for a project of database connectivity

  Hello

  I create a project using labview 2011, this project all simply select, edit and insert a file of access database by using the database connectivity Toolkit.

  There is no problem when I run this labview project, everything is perfect, but when I create a Setup program to run this project from another computer, I found something strange...

  the project do not insert or update the database, but it may choose the form, so I can say that the connection is good, so can any body tell me what is the problem.

  Help, please

  Thank you

  
  

• How to send the SQL for SQL Server statement and return data without using database connectivity Kit?

  Hi, I tried to figure out how to extract data from my SQL Server databases and reading messages and to do some tests with examples, I can get data connection type in my SQL server, but so far nothing helps.  Is it possible to get data from a SQL Server database without using the database connectivity Toolkit?  and if so, how?  are there whitepapers and/or examples of this?  So far, I can't find something that works.  Thank you.

  Jesse - what is your reason for not using the database connectivity Toolkit? It is by far the best way to recover the data.

• Problem installation database connectivity Kit

  My company manufactures in several factories around the world.  I have a problem in China and that you want to debug, and because the code is distributed in the form of exe, it is a problem.  My approach was to install a trial license of 30 days of LV2010 SP1, intend to withdraw when debugging is done.  So far, so good.  The problem is that the application requires the database connectivity Toolkit.  I downloaded a copy and tried to install.  It says it can't install because LV2010 is not installed.  Is it because of the eval license?

  If I wanted to rewrite hundreds of applications running, I could do that, but what I want is to install the DB Toolkit for a bit of troubleshooting.

  If NEITHER would alter the conditions on their license server, I would not have these problems.

• Database connectivity error: ADO...?

  I'm trying to export data in an Oracle database local using the Toolbox Database Connectivity.

  (I created my TEST table in the local Oracle database, I can access, write, read, etc. using SQL.) I also have the .dsn file that works with SQL)

  I get the following error:

  

  I found the problem. Not associated with LabVIEW (Duh...).

  Basically I have two copies of .tns names in two different folders. One of the files that I used to make a connection

  to the database did not have the correct login info and the other did. One who did was one I used.

• database connection status indicator

  I want to put something on the front of my program which will indicate the status of database connection. I think to ask at the tables in the list (it should be displayed), if the connection is good, it shows error. I tried and I think it works very well, but I don't know if it's the right way to do it, there may be better ways there, could someone point out he for me?

  Best regards

  You certainly don't want to open and close the connection. Maybe it will fail, but the 'real' connection is good. Maybe the real one has failed but this other works opening and closing. This could happen if the server has the maximum number of connections.

  Your connection is little go far?

  A simple method to check the connection just must have a loop that executes periodically a meaningless statement.

  

• Calling stored procedures with parameters with the database connectivity Toolkit

  Hi all

  I'm new to the forum and struggling to find a solution to a particular problem I have in this respect, using the LabVIEW Database Connectivity Toolkit on a project, I am currently working on my work.  I have a database in which I tables and stored procedures with parameters.  Some of these stored procedures have input, output and return parameters.

  I tried to follow this example, but to no avail: http://digital.ni.com/public.nsf/allkb/07FD130746083E0686257300006326C4?OpenDocument

  Such a stored procedure I am working on the implementation is named "dbo.getAllowablePNs", running "SELECT * from DeviceType" (DeviceType is the table).  In this case, it requires no input parameter, it has an output parameter that generates the table [cluster] and has a return parameter that returns an integer value (status code for execution) to show if an error occurred.  The DeviceType table has 3 columns; ID (PK, int not null), PN (nvarchar ((15), null) and NumMACAddresses (int, null).)  I have surpassed many examples and I talk to the support OR try to implement this and similar procedures stored in LabVIEW but have not been successful.  I am able to connect to the database with the VI of open connection without error, but spin in some confusion as a result of this step.  I then try to use the VI of parameter query create to call the stored procedure and set the parameters.  I guess I would then use the Set parameter value for each parameter that is connected to the entry of parameters on the previous query with parameters VI VI?  I am also having some confusion during and after these steps as well.  I would greatly appreciate advice or suggestions that anyone could have in this situation because I am not a SQL expert.  Also, I would be happy to provide more information that might be useful.

  Kind regards

  Jon

  Here's what I use to do this.  I think I had to change him create parameterized query VI for him to work.  There is a post on the forum about this somewhere.

  

• Database connectivity broken vi Toolkit

  Hi all

  I upgraded from LV 8.5 to 8.6 (windows XP platform) a couple of weeks and have had no problems until today when all of sudden my vi toolkit database is coming from broken, with: "one or more of the inputs needed for this function are not wired or are wired incorrectly. Display the context-sensitive Help window to see what should be the connections to this function. ' Mistakes however is not the case on all my vi using the objects in the Toolbox.

  Measures taken so far without success:

  1 mass compilation of my vi

  2 mass compilation of database Toolbox

  3 re install Database Resource Kit

  4 mass compile the directory vi.lib

  5 in the old knowladge base article Document ID: 2RO7J544, assured the latest microsoft MDAC is installed.

  Any help is appreciated as we use this receptive toolkit.

  Thank you

  Chris

  PLATES

  Hi Chris,

  Thanks for the reply and I hope that your well.

  I need to try to understand something, when you say that the LabVIEW 8.6 upgrade have you improved the Toolbox?

  Toolkit LabVIEW Database Connectivity 1.0.2 is for LabVIEW 8.6. If, on the other hand your trying to use LabVIEW 8.6 with DC Toolkit 1.0.1 so I think that they are not officially compatible. However, these links may be of interest knowledge base: (after all, they are just screws). However, to say this - if you read the Readme for the new toolkit, that many things have changed for LabVIEW 8.6 - so becareful.

  You will have to manually copy all the files in one version of LabVIEW to another. Use the following instructions to achieve:

  1. Install the database connectivity toolset to the version of LabVIEW, say X.
  2. Copy the following files/directories in the directories right in the latest version of LabVIEW, say Y.
     • Copy the data directory from \LabVIEW X\vi.lib\addons\ to \LabVIEW Y\vi.lib\addons\
     • Copy the file database.llb \LabVIEW X\project\ to \LabVIEW Y\project\
     • Copy the data directory from \LabVIEW X\examples\ to \LabVIEW Y\examples\

  OR also check this,

  Installation of toolkits for use with several Versions of LabVIEW:

  http://digital.NI.com/public.nsf/allkb/58BE852CB35237C786256A290079DF39?OpenDocument

  Other questions that you may have encountered,

  Database connectivity tools claims are a polymorphic Subvi Broken

  http://digital.NI.com/public.nsf/allkb/0FA97221637E74CA86256C7C005069A5?OpenDocument

  "Update to the latest MDAC will solve this problem."

  I would also check that you have installed the Toolkit for LabVIEW 8.6 - toolkits are now specific for labVIEW 8.6. Then maybe try to reinstall and the Toolbox for LV8.6.

  Hope this helps and please let me know (Please specify a little more).

• Win 7 crashes when you use multiple wifi connections.

  Hi Shinmilla,

  I have a problem with Win 7. How did it crash the system when you use multiple wifi connections. How can I stop this from happening?

  Thank you.

  Hi Triode888,
   
  It is not recommended to have multiple Wifi connections since signals can be contradictory and therefore it crashes.
  You can't have several active Wifi connections at the same time.
   
  Also, I suspect it might be caused by your network wireless itself. It could be automatically connected to a network of 'death '. So please check that your wireless network is disabled or no if you do not use.
   
  You have installed VMware or Virtual PC?
   
  If so, these programs will create a new network - please open the network and sharing Center and disable these additional networks.
  
  1. open the network and sharing Center page in the control panel.
   
  2 confirm that it says multi-network right under the icon in the Middle, like the screenshot above.
   
  3. click on the link customize to the right of the first illustrated network, directly under the Internet icon, to display the window set the network location:
   
  4. move the window set the network location away, but let him open. (You'll need it in a minute, but at a time where it is otherwise inaccessible.)
   
  5. back on the network and sharing Center page, click on the link manage network connections (in the left task pane).
   
  6. in the network connections window, select the network adapter through which you get your Internet connection. (The views drop-down list, select Details; you want probably said something like network, unidentified in the status column.)
   
  7. click on disable this device network above (next to the big red X) button. Wait a few seconds for the chart on the network and sharing Center page to reflect the change.
   
  8. return to step #3 set network location window, and click on the merge or remove link network down locations.
   
  9. Despite Vista earlier assertion that he detected "multi-network," you will see probably only a single network in the window of merge or delete network locations:
   
  10. turn highlighted the only participant and then click on remove. (If there is more than one, you can delete all.)
   
  11. When you are finished, close the merge or delete network locations, and then close the window set the network location.
   
  12 return to the network connections window and with the adapter disabled network always highlighted the #6 step, click the option activate this device network (next to the big orange arrow) button.
   
  13. after 10-15 seconds of delay, your Internet connection should work now, signified by the absense of the treacherous of entries multiple networks in the network and sharing Center page:
   
  For more reference in http://social.answers.microsoft.com/Forums/en-US/w7network/thread/272b55ce-fb9a-423b-9a9a-8299f853cc29 look
   
  Aziz Nadeem - Microsoft Support