How to deal with heavy users - lots of downloads

Dears,
Our Wireless environment faces a lot of co-channels and sometimes also 3 or 4 overlappings. Unfortunately we cannot change to 5GHZ range because of our laptops.
Sometimes when we do some downloads, we see a lot of packet drops on all clients connected to the same AP.... We use WLC 5508 and APs 1142, 2602i, 2602e and 3602e APs.
Is there any feature on WLC to deal with these downloads ?
thanks!

Did a site survey take place when the network was being installed? If so, you can use that as a base line and input for making changes to your network and validating those. If not I would advise you to do so, so you really get to know your RF and determine if the problems you are running into can be fixed with configuration changes only or if you physical need to make changes (like changing the position of AP's or swapping antennas).
In the mean time I would advise you to check the current AP power-levels of the 802.11b/g/n radios and also the data-rates you have currently enabled for 802.11b/g/n. If you don't have any 802.11b and/or 802.11g only devices I would disable all the data-rates under 12Mbit/s and make 12Mbit/s the only mandatory data-rate. This should at least limit the effects of CCI a little, but you really need to watch the power-levels and also monitor the WLC logging of coverage errors.
Depending on the current version of code you are running, also a software upgrade may fix some issues you are probably running into. Version 7.6.130 or 8.0.110 are good choices at the moment.

Similar Messages

How to deal with .csproj.user being created/modified by Visual Studio before the project is run?

So, what is the problem?
The problem is that Visual Studio considers .csproj.user a dependency of the project being run.
Let us assume the following:
- We have a freshly built solution containing a web application project `X` as the Start Up project.
- There are Silverlight applications served by the X web application.
- There is no `X.csproj.user` file initially.
Now consider the following flow of events:
1. Open the solution in the Visual Studio
2. Build.
3. Run.
4. A dialog is open to ask whether Silverlight debugging is to be enabled. Enable it.
5. Stop the debugging session.
6. Run again.
7. Stop the debugging session.
8. Run again.
Assuming nothing is built at step 2 (because the solution is totally up to date), will there anything be built at steps 3 and 6?
The answer is affirmative and here is why:
- The X.csproj.user file is actually created by Visual Studio when the project is requested to run. What happens next is that the
X.csproj.user file is considered a dependency of the project
X by the Visual Studio. Being created just now the file is newer than the project binaries and so Visual Studio builds the project
X. This explains why the project is built at step 3.
- When we agree to enable Silverlight debugging Visual Studio records this agreement in the
X.csproj.user file. So the file is modified again, after the project has started running. Restarting the debugging session is going to build the project
X yet again, after all X.csproj.user is again newer than the binaries built a second ago. This explains why the project is built at step 6.
Fortunately, nothing is built at step 8.
Call me petty, but I want to avoid the builds at steps 3 and 6. The problem is that I am not allowed to check in the X.csproj.user file, because that is likely to create a mess with people accidentally checking in their private changes.
On the other hand, I am unable to move its default content (along with the agreement to enable Silverlight debugging) into the project file
X.csproj. Well, I can, but it is just being ignored.
So, here is my question - is it possible to separate the content stored in a
.csproj.user into two groups:
- Permanent. These are the things I would love to have in the .csproj file. It will be checked in.
- Temporary/Private. These are the things private to individual developers. Never checked in.
Visual Studio already allows this separation for certain properties - see the
Apply server settings to all users (store in project file) checkbox in the Web properties tab of a Web application project - http://olalalittlen.wordpress.com/2011/07/20/vs-tips-managing-server-settings-in-web-projects-for-multi-developer-scenarios/.
However, it is insufficient.
Any other ideas on how to prevent the aforementioned redundant builds are welcome too.

Hi Mark,
I think your issue is more about project itself. the saved information in the .csproj.user settings is about the project's information.
So I suggest you post your issue to the related project forum.
web forms:http://forums.asp.net/18.aspx/1?Web+Forms
mvc:http://forums.asp.net/1146.aspx/1?MVC
Regards.
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey.

How to deal with user session when power goes off

Hi
All,
One day I had 170 oracle session connected on oracle database server and and suddenly electricity went off. but server was still running. and after power back on ther same bunch of user try to connect it.So I don't know what happen to those 170 session. does anybody know how to deal with this? I did shutdown and restart of database but I am not sure that is correct way to deal with this kind of situation.
Thanks,
Vishal

If the database server is still running, the sessions will remain there, but it depends on how they got connected to the server. If they got access through a middle tier which maintains the session and this MT is still running the sessions will still be visible from the database perspective, unless the MT handles the disconnection event.
If the sessions are working on a Client-Server basis, then PMON will mark the sessions as abruptly broken and it will get rid of them. Sessions may eventually remain hanged, but it depends on the topology, so the way you proceed was a clean database restart.
~ Madrid
http://hrivera99.blogspot.com

How does Essbase deals with multi-users

How does Essbase deals with multi-users connecting for reading and writing in the same time? How the global coherence of the database is controlled when users are updating dimension and data all together?

For reading, Essbase handles multiple requests concurrently. For metadata (outline) only one user at a time can make and save changes.For data, Essbase uses a block level locking mechanism, which implies that an update to a block can only be done by a single update request, but other blocks in the database are still updateable by other users.Hope that helps.Regards,Jade---------------------------------Jade ColeSenior Business Intelligence ConsultantClarity [email protected]

How to deal with deadlock on wwv_flow_data table when http server times out

There are some threads about a deadlock on the wwv_flow_data table. None of them contain a real explanation for this behaviour. In my case I will try to explain what I think is happening. Maybe it helps somebody who is hitting the same matter.
In my case with APEX 3.2.1 I am navigating from one page to another. Doing this APEX will lock the table wwv_flow_data. As soon as the other page is shown the lock will be released. But now this other page contains a bad performing query (standaard report region). After 5 minutes the http server (modplsql) will time out and present the message "No response from the application server" on the screen. In the meanwhile the query is still running on the database server and the lock stays on the wwv_flow_data table.
Normal user behaviour will be that the user will use the back button to return to the previous page and tries it again to navigate to the other page or
the user will try to refresh the page with the bad performing query.
And voila now you will have a deadlock on the wwv_flow_data table since a second session is trying to do the same thing while the first hasn't finished yet.
How to deal with it?
First of all. Have a good look at the bad performing query. Maybe you can improve it that it will succeed before the http server will timeout.
In my case the 11gr1 optimizer couldn't handle a subquery factoring clause in the best way. After changing it back to a classical inline query the problem was solved.
Secondly you could increase the timeout parameter of the http server. Although this not the best way.
Maybe it would better if APEX in a next version would release the lock on the table wwv_flow_date earlier or do a rollback just before the moment that the http server is timing out.
regards,
Mathieu Meeuwissen

Hello Shmoove,
I saw your reply here and you probably understand the problems the HTTP 100 response may cause.
I am trying to send image that was taken by getSnapshot. The problem is that the server respond with this HTTP 100 message.
I suspect that the reason that my server doesn't recognize the file that I'm sending from J2me is that the "server to client" response to the 100 message comes after the second message of (see what the TCPIP viewer shows down here):
POST /up01/up02.aspx HTTP/1.1
Content-Type: multipart/form-data; boundary=xxxxyyyyzzz
Connection: Keep-Alive
Content-length: 6294
User-Agent: UNTRUSTED/1.0
Host: szekely.dnsalias.com:80
Transfer-Encoding: chunked
400: Client to Server (126 bytes)
78
--xxxxyyyyzzz
Content-Disposition: form-data; name="pic"; filename="david.jpg"
Content-Type: application/octet-stream
400: Connected to Server
400: Server to Client (112 bytes)
HTTP/1.1 100 Continue
Server: Microsoft-IIS/5.1
Date: Wed, 23 Mar 2005 00:47:02 GMT
X-Powered-By: ASP.NET
Any help will be appreciated,
David

How to deal with "Error 1001. The specified service already exists" when install a service using installer package?

Hi everybody,
I wrote a "Class Library" project which is a service using Visual Stodio 2008 recently, then tried to use a Visual Studio 2008
Setup Project to install it.
Here is what I did for the "Class Library":
1. Finish the program.cs, Service.cs
2. Add Installer
3. Change the serviceInstaller so that "StartType" to be Aotumatic
4. Change the ServiceProcessInstaller2 so that "Account" to be LocalSystem
5.
6. Click in F5 (Start Debugging)
Here is what I did for the Setup Project:
1. Add the exe file built from the "Class Library" project to the Application Folder
2. On the Custom Action Editor, add the exe file from 1 to Install and Commit
3. Change the property of the project so that "RemovePreviousVersion" to be true
4. Click on F6(Build Solution)
Then I tried to run the msi file from the built of the Setup Project. Because I modified the two projects serveral times, I uninstalled the Class Library using "Control Panel->Add or Remove Programs" before I reinstall. Two things I notived:
1. After unstall, the registry was not cleaned up about the installed program
2. After several rounds install/uninstall, I got "Error 1001. The specified service already exists"
My questions are:
1. How to cleanup the registry when uninstall a program?
2. How to deal with the "Error 1001. The specified service already exists"?
3. Did I do anytbing wrong with the "Class Library" or the "Setup Project"?
Thanks a lot!
Helen

Hi Simon, not a problem!
I spent some more time on this and here are few more notes:
it is called Major Upgrade, when you are installing new version of the product upon a previous one and
MSI supports 2 strategies:
Strategy 1. Install a new version and uninstall previous one. (Install a new version right upon previously installed version (file merging is performed based on dll version number) and the delete previously
installed files)
Strategy 2. Uninstall previous version and install a new one (Delete all previous files and install from scratch new files.)
From the first look it seems that 1st strategy is weird and buggy. But, remember, MSI is great because it's transactional!!! That means that if once some of the phases (Installation, Uninstallation, Rollback, Comit) fails, your machine
will be reverted to the previous state and it'll be still functional.
Let's consider both strategies:
Consider you have installed product_v1.msi and you want to install product_v2.msi.
Strategy 1
1. MSI engine copies files from Product_v1 directory to TEMP directory
2. MSI engine merges files based on the assembly version (between v1 and v2)
3. Once merging is completed successfully it removes files in TEMP (RemoveExistingProducts action triggers it) and you got product_v2 installed, otherwise if it fails MSI engine revert machine to V1 and copies previous files from TEMP.
Strategy 2
1. MSI engine tottaly removes all files from v1.
2. MSI engine installs v2 files and if something goes wrong you cannot revert back, because RemoveExistingProducts allready worked out and MSI doesn't have files to revert machine back
I recommend to everybody to use Strategy 1 and leverage MSI transaction functionality. And you can set this strategies by defining sequence of RemoveExistingProducts action. See more info
here. So, I think it's not even a bug in VS as I said in the upper post it is default recommened behaviour.
AND, you got "Error 1001. The specified service already exists"
because if we follow Strategy 1 MSI engine tries to install Windows Service on top of the existing service and OF COURSE it fails MSI engine (StopServices, DeleteServices actions are executed before actual
installation and they look at ServiceControl table). In order to stop service first and delete them you have to fill ServiceContol table of the MSI (and then StopServices, DeleteServices actions will recognize what to they have to stop
and delete), like this:
*clip*clip*clip*
' see http://msdn.microsoft.com/en-us/library/windows/desktop/aa371634(v=vs.85).aspx for more info
' Update the Service Entry to stop and delete service while uninstalling
query = "INSERT INTO ServiceControl (ServiceControl, Name, Event, Arguments, Wait, Component_) VALUES ('MAD_Service', 'Service name', '160', '', '1', '"
+ componentName + "')"
Set view = database.OpenView(query)
: CheckError
view.Execute : CheckError
' Update the Service Entry to stop and delete service while installing
query = "INSERT INTO ServiceControl (ServiceControl, Name, Event, Arguments, Wait, Component_) VALUES ('MAD2_Service', 'Service name', '10', '', '1', '"
+ componentName + "')"
Set view = database.OpenView(query)
: CheckError
view.Execute : CheckError
*clip*clip*clip*
We can uninstall service first by following Strategy 2, but then we lose transactional support.
So, Simon did I encourage you to change your code a bit?:)
And, btw, if you don't want to change the strategy, please don't rely on SequenceID in MSI table, it can be change, you have to get the at the runtime.
Hope it will help to everybody!
See also more advanced explanation of how MSI works
here.
Truly yours, Marat

IMac SSD full - how to deal with the two drives

Greetings all,
I've been using an iMac i7 with two drives SSC and HDD. Recently, I've been having issues with the SSD being close to full. I use it for applications only, although some apps need lots of space (iTunes, iMovie, Photoshop, etc.) I use Lightroom and have all the images on the spinning drive. Does anyone know how to deal with this issue? Any way I can move the music from iTunes to the separate drive, or any way to figure out what exactly is using most of my space?
Thanks in advance for your help.
erlkonig

Here's some utilities for analyzing disk space:
DiskInventory
GrandPerspective
OmniDiskSweeper
WhatSize
You might want to consider putting your home directory on the HDD.
How to Move the Home Folder in OS X – and Why
Moving your home folder in OS X

How to deal with the growing table?

Every tables are growing in any applications. In some applications, tables become larger and larger quickly. How to deal with this problem?
I am developing an application system now. Should I add a lot of delete commands in the code for each table?

junez wrote:
Every tables are growing in any applications. In some applications, tables become larger and larger quickly. How to deal with this problem?
I am developing an application system now. Should I add a lot of delete commands in the code for each table?Uh, well, yes if you continually add rows to a table the table will grow ... sooner or later you will want to delete rows that are no longer needed. What did you expect? You have to decide what the business rules are to determine when a row can be deleted, and make sure your design allows for such rows to be identified. This is called ..... analysis and design.

How to deal with the rejected stock if it is rjected by QC

Dear All,
please let me know how to deal with the rejected stock from Quality point of view.i.e., for incoming materails and Finished if returned from customer
Regards,
P.Vijaya

hi
if material is rejected for incoming material then you can create Notification for incoming material due to you can return back material with print for that you have to record defects in result recording. in T-code QM02 if result is recorded with defects. or you can create with Qm01.against vendor
if material is returned from costumer you can create inspection lot for that for that you have to maintained inspection type 06 in material master. you can result record for that you can create notification for that. or rework for this material as per quality check or can scrap
if have any problem please come back
regards
Pravin

How to deal with hindi lang

I am storing text messages in a PropertyResourceBundle as follows
txt_EmailAdd = {mel ADres
txt_Password = pasvDR
I made the above file in MSword using hindi fonts
The folllowing text is supposed to be in hindi
{mel ADres
pasvDR
but it does not show the text in hindi it still shows in English but when I open the above text file in MSword it shows the text in hindi
Please tell me how to deal with this problem . I hope you people reply as eaarly as possible.
I also have another prob, I am developing a website using jsp+servlet now I have made the above mentioned property file and stored it in c:\tomcat5.0\webapps\emailreadersevice\IndexMessagesBundle.properties
but when I access it from my application's index.jsp file Tomcat gives me following exception
java.lang.NullPointerException
     java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:714)
     java.util.ResourceBundle.getBundle(ResourceBundle.java:579)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:55)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
My index.jsp file is stored in c:\tomcat5.0\webapps\emailreaderservice\index.jsp
In my index.jsp file i have written the following statement to get the IndexMessagesBundle but tomcat gives me the above exception.
ResourceBundle IndexMessages = ResourceBundle.getBundle("IndexMessagesBundle",currentLocale);
Please guide me abt how to go abt it. Also tell me whether I am doing the right thing or not. If no then please tell me the right steps to follow

Hi one_dane
I have made the property file using hindi fonts to type the following thing
{ m e l A D r e s
p a s v D R
No the above values are not place holders Infact in order to type EmailAddress and Password in hindi I had to type the above keys. so when I put system.out.println in my jsp page it does not display any hindi text but the above keys which i used to type in order to display hindi text in my txt file.
But I think i am not going on the right track should i type the unicode values for hindi text which is of the form \udddd in my property file. I have the unicode chart for hindi fonts so I can look up the chart and type appropriate unicodes(\udddd) to display Email Address and Password in hindi. Or am i still not getting how to do it? If not then please tell me how did you create your hindi property file. Is the following that you typed in your property file or is it the output of converting your property file into unicode using native2ascii
title=\u090f\u0926\u0938\u093e \u092a\u0917\u0932\u094d\u0917 \u0942\u093e\u0902\u0942JSP i18n issues
Please reply as soon as possible and hanks a lot for your help.
Eagerly waiting for a reply,
Heti shah

How to deal with BP inconsistencies in SRM?

Dear Experts,
How to deal with Business Partner inconsistency in SRM?
A BP is damaged beyond repair?
Should we delete the BP of the user (SU01 user)? Are we allowed to delete a BP? or do we need to archive the BP?
What will happen to the follow-on documents of the particular BP?
Should we close all the transactional documents or we should simply the change the BP of the documents manaully?
Please, share your expereince.
Thanks and regards,
Ranjan

Hi
What kind of Inconsistencies are there...Deletion of BP is last resort in such cases. Although its only possible to put a deletion/blockecd indicator for the BP. BP is never deleted completely from SRM unless you archive it.
Regards
Virender Singh

How to deal with files ?!!!!

hiii, guys i dont believe that a huge program like flash with
all these abilities doesnt deal easily with files !!! I just want
to do simple reading and writing to text files. Something veryyyyyy
simple like writing a name and reading it again later
!!!!!!!!!!!!!!!!!! i know how to load them by using loadVariable()
,,, but how can i write to the file ?!! it's really annoying if i
have to use asp scripting or xml or ... to do such easy job !!! i'm
facing difficulties because i know ActionScript and VB and C++
only,,, I dont know how to deal with asp and xml !!! @_@
But, if this is the only way to do this, plz tell me in steps
how to write a name and read it again in flash, THANX

If you are sticking to those three languages and you have
Flash CS3, you may want to consider publishing to an AIR
application. Adobe's done a lot of work to keep the security tight
on Flash Player which is one (if not the only... not sure) reason
that you cannot do this with Flash alone. You would have to use a
server-side script to accomplish what you want with Flash Player.
Here is a tutorial on an AIR app that writes to txt files:
http://www.adobe.com/devnet/air/flash/quickstart/building_text_editor.html

Move of mailbox with over 30K of folders fails, how to deal with this.

Hello all,
I'm in the process of moving all Exchange 2010 mailboxes to newly created databases located on new storage.
Every mailbox except one moved successfully, the "problem" mailbox keeps failing and I need some advise on how to deal with this.
The mailbox that keeps failing is only 4 GB but has over 30K of folders that the users created manually over the years.
They are unable to easelly delete folders as they have created many sub folders within the folders.
I posted a part of the failed move request log below.
Can anyone advise on how to solve this?
Thanks in advance.
21-2-2015 18:15:13 [EXHUB1] Fatal error MapiExceptionMaxSubmissionExceeded has occurred.
Error details: MapiExceptionMaxSubmissionExceeded: Unable to save changes. (hr=0x80004005, ec=1242)
Diagnostic context:
Lid: 55847 EMSMDBPOOL.EcPoolSessionDoRpc called [length=7574]
Lid: 43559 EMSMDBPOOL.EcPoolSessionDoRpc returned [ec=0x0][length=360][latency=0]
Lid: 23226 --- ROP Parse Start ---
Lid: 27962 ROP: ropWriteStream [45]
Lid: 27962 ROP: ropSetProps [10]
Lid: 27962 ROP: ropSaveChangesMessage [12]
Lid: 17082 ROP Error: 0x4DA
Lid: 18273
Lid: 21921 StoreEc: 0x4DA
Lid: 27962 ROP: ropExtendedError [250]
Lid: 1494 ---- Remote Context Beg ----
Lid: 26426 ROP: ropSaveChangesMessage [12]
Lid: 27420 dwParam: 0xE1F000B
Lid: 36537 dwParam: 0xE1F000B
Lid: 5587 StoreEc: 0x8004010F PropTag: 0xE1F000B
Lid: 33375 StoreEc: 0x8004010F
Lid: 27420 dwParam: 0x806684B0
Lid: 36537 dwParam: 0x806684B0
Lid: 5587 StoreEc: 0x8004010F PropTag: 0x806684B0
Lid: 64931 StoreEc: 0x8004010F
Lid: 46509
Lid: 40193 StoreEc: 0x8004010F
Lid: 5587 StoreEc: 0x8004010F PropTag: 0x30130102
Lid: 21970 StoreEc: 0x8004010F PropTag: 0x668F0040
Lid: 64319 dwParam: 0x5000
Lid: 39743 dwParam: 0x6730
Lid: 45016 StoreEc: 0x4DA
Lid: 57304
Lid: 5041 StoreEc: 0x4DA
Lid: 4465 StoreEc: 0x4DA
Lid: 6926 StoreEc: 0x4DA
Lid: 1750 ---- Remote Context End ----
Lid: 31418 --- ROP Parse Done ---
Lid: 21457
Lid: 19665 StoreEc: 0x4DA
at Microsoft.Mapi.MapiExceptionHelper.ThrowIfError(String message, Int32 hresult, SafeExInterfaceHandle iUnknown, Exception innerException)
at Microsoft.Mapi.MapiProp.SaveChanges(SaveChangesFlags flags)
at Microsoft.Exchange.MailboxReplicationService.MoveObjectInfo`1.CreateMessage(T obj, GetAdditionalProperties getAdditionalPropertiesCallback)
at Microsoft.Exchange.MailboxReplicationService.MoveObjectInfo`1.CreateMessage(T obj)
at Microsoft.Exchange.MailboxReplicationService.LocalMailbox.Microsoft.Exchange.MailboxReplicationService.IMailbox.SaveSyncState(Byte[] key, String syncStateStr)
at Microsoft.Exchange.MailboxReplicationService.MailboxWrapper.<>c__DisplayClass57.<Microsoft.Exchange.MailboxReplicationService.IMailbox.SaveSyncState>b__56()
at Microsoft.Exchange.MailboxReplicationService.ExecutionContext.Execute(GenericCallDelegate operation)
at Microsoft.Exchange.MailboxReplicationService.MailboxWrapper.Microsoft.Exchange.MailboxReplicationService.IMailbox.SaveSyncState(Byte[] key, String syncState)
at Microsoft.Exchange.MailboxReplicationService.MailboxCopierBase.SaveSyncState(SaveStateFlags flags)
at Microsoft.Exchange.MailboxReplicationService.BaseJob.SaveSyncState(SaveStateFlags flags)
at Microsoft.Exchange.MailboxReplicationService.BaseJob.SaveState(SaveStateFlags flags, UpdateRequestDelegate updateRequestDel)
at Microsoft.Exchange.MailboxReplicationService.MoveBaseJob.SortMessages(Object[] wiParams)
at Microsoft.Exchange.MailboxReplicationService.CommonUtils.CatchKnownExceptions(GenericCallDelegate del, FailureDelegate failureDelegate)
Error context: --------
Operation: IMailbox.SaveSyncState
OperationSide: Target
Primary (a4966c13-778a-4d70-9087-f077e2523f66)
Key: FEF1D04E070AB74A99B809B7797674AE000000000000000000000000000000009B5540B45B37774CAB84806C1964B598
SyncStateLength: 27050362
21-2-2015 18:15:13 [EXHUB1] Relinquishing job.

Hi,
Based on the description, please run the following commands to check if there are any message limit size. Try to increase the limit size then move this mailbox.
Get-mailbox –identity “user name” | fl MaxSendSize,MaxReceiveSize
Get-transportconfig | fl MaxSendSize,MaxReceiveSize
Get-transportrule | fl MessageSizeOver
Get-sendconnector | fl MaxMessageSize
Get-receiveconnector | fl MaxMessageSize
Note: Once we increased the value we need to wait for the AD replication and cache to be cleared and then test the move mailbox.
If this doesn’t work, please try to move mailbox with the skip corrupted items. This will skip the corrupted items and move only the good items to the target mailbox.
Similar thread:
https://social.technet.microsoft.com/Forums/en-US/5383a826-4383-4b26-a503-2c3bb635f9d2/mailbox-move-to-exchange-2010-fails-for-mailboxes-over-23-gb?forum=exchangesvrdeploylegacy
Best Regards.

How to deal with visession in IVI-C driver program ?

a ViSession is an identifier that corresponds to a session.
My instrument is a remote internet device . i can call VISA library to implement
communication between labwindows and my remote internet device.In this case , what is meaning of Visession
? It looks as if Visession does not have a relation to my IVI-C driver program.
if it has a relation to my driver, how to deal with the ViSession in IVI-C driver program?thank you

ViSession is necessary as part of a larger picture and fills an important role in good architecture. Intrument handles (stored as the ViSession type) are necessary for large projects, which may require commanding multiple instruments.
There is no function to call which can get or set a ViSession value, similar to the way other attributes are set with driver functions. The ViSession intrument handle is created and returned to the application when an instrument is initialized; it represents a connection with one particular instrument.
This allows users to have multiple instruments connected, which can be controlled programmatically with one application. Then, the application can quickly specify which instrument it would like to send a command, just by sending one instrument handle or another.
Yes, you could remove the ViSession as parameter in your functions, but it would cripple the big picture effectiveness of the driver. In place of the ViSession, you would have to send each function the Resource Name or Resource ID for the particular instrument as well as the Option String. So really, it is just more practical and better practice to use an instrument handle (stored as the ViSession type).
That being said, for certain functionality (adding two numbers), you absolutely do not need a ViSession instrument handle parameter. You will have to use your best judgement to determine where to include or exclude this parameter. I suggest using the ViSession instrument handle parameter with any function that communicates with an instrument.
Also, Ebalci is correct regarding the difference between ViSessions and channels. ViSessions are used to communicate with different instruments. To reference or read a specific channel from an instrument you will have to refer to the guidance in the manual for the instrument in question. There will likely be a command to select a specific channel when reading from the instrument. And for general guidance, I suggest reviewing another IVI driver, possibly for an instrument of the same class or type or maybe from the same family, if such a driver already exists.
Regards,
Shawn S. | NIC
Instrument Driver/IVI PSE
National Instruments

How to deal with CGEHS (central goverment employees health scheme0

HI!
All!
Can any one please tel me as to how to deal with CGEHS --- Central Government Employees Health Scheme in indian pay roll, which is not available in the Standard Indian Pay roll.
How much development is needed?
My understanding is that the following are required to be done..
A) we need to create a cumulative wage type in It 14 whcih applies to all the employees then accordingly a pcr
b) we need to create a unique ID, i mean CGEHS id and assign to every employee in IT 0105
c) creation of various clinics/hospitals.
d) provision for reimbursement... etc...
My doubts are..
a) how to deal with the retired employees CGEHS contribution and reimbursement?
how much developement is needed interms of user exits or abap developement.?
Can any one please give some idea or some kind of document may be proto kind of doc will also do...
Its little urgent..
answer would be awarded the points.
thanking you in advance..
regards
rao

Further to Madhu,I feel you can redefine your feature IGMOD in such a way so that the same set of fields become applicable under different module pools.
V_t588D and Feature IGMOD needs to be redefined in such cases.

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