What is an Instance in application server and how to create an Instance?

Hi All,
What is an Instance in application server and how to create an Instance? What is the procedure to get file path from an Instance?
What is the significance of Instance in ABAP?

hi
good
go through these links,this will gives you complee idea about the creating instances in application serverl.
http://www.erpgenie.com/sap/basis/
http://www.sapdevelopment.co.uk/file/file_disall.htm
thanks
mrutyun^

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Hi,
Check out this link :
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/0f/ab3a3c9ca75402e10000000a114084/content.htm">http://help.sap.com/saphelp_nw04/helpdata/en/0f/ab3a3c9ca75402e10000000a114084/content.htm</a>
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What is diff between oracle application server and weblogic server?

what is the exact difference between oracle application server and weblogic application server?

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Difference between application server and central instance

Hi everyone,
whats the difference between application server and central instance and message server. where it will be installed. and how?
Regards
Basis Fresher

Hi,
just want to clarify that is is not correct that only one enqueue process can be configured on the CI.
Please see the documentation within transaction RZ11 for the parameter Parameter : rdisp/wp_no_enq
Short description : number of enqueue work processes
Parameter description :
You can use this parameter to define the number of enqueue work processes for the instance.
Ensure that a value >0 is only set on the central instance that provides the enqueue server (instance rdisp/enqname ). One enqueue work process on the central instance is normally sufficient (rdisp/wp_no_enq = 1); only in very large systems can a higher value be useful.
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What are the commands available to read a file from application server and

What are the commands available to read a file from application server and store the file into an internal table?

Hi,
To read a file from an Application Server to an Object there is a command in ABAP called READ DATASET. After that file is transported to that object you have to do a loop and put that data in an Internal Table.
This statement exports data from the file specified in dset into the data object dobj. For dobj, variables with elementary data types and flat structures can be specified. In Unicode programs, dobj must be character-type if the file was opened as a text file.
For dset, a character-type data object is expected - that is, an object that contains the platform-specific name of the file. The content is read from the file starting from the current file pointer. After the data transfer, the file pointer is positioned after the section that was read. Using the MAXIMUM LENGTH addition, the number of characters or bytes to be read from the file can be limited. Using ACTUAL LENGTH, the number of characters or bytes actually used can be determined.
In a Unicode program, the file must be opened with an arbitrary access type; otherwise, an exception that cannot be handled will be triggered.
If the file has not yet been opened in anon-Unicode program, it will be implicitly opened as a binary file for read access using the statement
OPEN DATASET dset FOR INPUT IN BINARY MODE.
. If a non-existing file is accessed, an exception that can be handled can be triggered.
Influence of Access Type
Files can be read independently of the access type. Whether data can be read or not depends solely on the position of the file pointer. If the latter is at the end of the file or after the file, no data can be read and sy-subrc will be set to 4.
Influence of the Storage Type
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If the file was opened as a binary file or as a legacy-binary file, as much data is read that fits into the data object dobj. If the data object dobj is longer than the number of exported characters, it is filled with hexadecimal 0 on the right.
If the specified storage type makes conversion necessary, this is executed before the assignment to the data object dobj. Afterwards, the read data is placed, byte by byte, into the data object.
System Fields
sy-subrc Meaning
0 Data was read without reaching end of file.
4 Data was read and the end of the file was reached or there was an attempt to read after the end of the file.
Thanks,
Samantak.
Rewards points for useful answers.

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j2ee -verbose
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Sun ONE generally refers to the Sun ONE Application Server version 7.x. This is a J2EE 1.3 compliant application server from Sun. Sun also released a Reference Implementation version (RI) as a requirement of the J2ee 1.3 spec. This is the J2EE server you are refering too. The Sun ONE Application Server 7 is a more robust production ready App Server.
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What is procedure to make application server for existing server

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Thanks in advance.
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hi
good
go through these links,this will gives you complee idea about the creating instances in application serverl.
http://www.erpgenie.com/sap/basis/
http://www.sapdevelopment.co.uk/file/file_disall.htm
thanks
mrutyun^

Error starting the Application Server and Deployment Tool

After installing the iPlanet Aplication Server with sp3 I get the following
errors starting the Application Server and Deployment Tool.
iAS Application Server
================
GXBindInit: GXBindBasic failed
GXContextInit: GXBindInit failed 2
[26/Out/2001 17:46:49:8] error: ENGINE-context_init_failed: EngineClassSpace
ContextModule.createContextInit failed:
error: could not get context
*** Errors in initialization from registry ***
Errors in initialization, exiting ...
iAS Deployment Tool
===============
GXBindInit: GXBindBasic failed
GXContextInit: GXBindInit failed 2
[26/Out/2001 17:23:40:7] error: ENGINE-context_init_failed: EngineClassSpace
ContextModule.createContextInit failed:
Exception in thread "main" java.lang.NullPointerException
at com.kivasoft.util.Util.loadComponent(Unknown Source)
at
com.iplanet.ias.tools.buzz.ui.application.StartBuzz.initGDS(Unknown Source)
at com.iplanet.ias.tools.buzz.ui.application.StartBuzz.main(Unknown
Source)
Can anyone help me please!

Hi,
Would be more helpful if you can mention, the O/S. Also, pls mention where
you are getting this error, at kjs or kxs, or, are you able to start the server
and at which specific instance do you encounter this.
Regards
Raj
"Antonio Casqueiro" wrote:
After installing the iPlanet Aplication Server with sp3 I get the following
errors starting the Application Server and Deployment Tool.
iAS Application Server
================
GXBindInit: GXBindBasic failed
GXContextInit: GXBindInit failed 2
[26/Out/2001 17:46:49:8] error: ENGINE-context_init_failed: EngineClassSpace
ContextModule.createContextInit failed:
error: could not get context
*** Errors in initialization from registry ***
Errors in initialization, exiting ...
iAS Deployment Tool
===============
GXBindInit: GXBindBasic failed
GXContextInit: GXBindInit failed 2
[26/Out/2001 17:23:40:7] error: ENGINE-context_init_failed: EngineClassSpace
ContextModule.createContextInit failed:
Exception in thread "main" java.lang.NullPointerException
at com.kivasoft.util.Util.loadComponent(Unknown Source)
at
com.iplanet.ias.tools.buzz.ui.application.StartBuzz.initGDS(Unknown Source)
at com.iplanet.ias.tools.buzz.ui.application.StartBuzz.main(Unknown
Source)
Can anyone help me please!

Load balancing between application server and database

Hi,
is there any load balancing between the application server and the database? Consider we have a single instance of an application server that sends database queries from different clients to the database. Are the requests queued in some way at the application server, allowing to control the flow of the queries (e.g. queries from "more important" clients might be sent with a higher priority)?
Thanks for your help!

Hi Victor/Jim/Volker,
Thanks a lot for all the responses..
Just wanted to let you guys know that my installation finished successfully.
The thing which confused me was that my Qtime, Qdate and everything else was showing correct values..
Well, my problem I set the environmental variable PASE_TZ to the EST time zone on a SYS level using WRKENVVAR>F4>SYS and added the variable. I logged off and the sidofr logged off, but one user which should have logged off and didn't was the "SAPINST"(my installation user) which was logged in the subsystem TMKSVR00.
Even when I had closed the SAPINST installlation program, the user doesn't log off...it just sits there until and unless u shut him out of the system using the option 4 on wrkactjob for ending the JOB(SAPINST logged in the system below the TMKSVR00 subsystem)
So since the SAPISNT user never logged of, his environmental variables were not initilized properly, even after the changes...
This thought came to me almost after a 6 hours of wasting my time searching for notes here and there...
I think when u end/stop the install in SAPINST, the SAPINST user should log off the AS400 system, but I have noticed, it never does...although when u restart the installation, if u have noticed it shows you the log on for the SAPINST user in the TMKSVR screen...
Its kind of buggy, I would say...
I have noticed, that even when I log on to AS400 from home or from a remote PC using Emulator, it shows me logged in the subsystem and even after i have logged of, it still shows me there...
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In what tables does Data in Application Server save ?

Dear Gurus,
In what tables does Data in Application Server save ?
Does the code we write is saved in some tables (or) saved in
repository ??
what is a repository ???
what are the tables where repository data is saved ????

>
Srikar M wrote:
> Dear Gurus,
>
> In what tables does Data in Application Server save ?
All of them
>
Srikar M wrote:
> Does the code we write is saved in some tables (or) saved in
> repository ??
Both
>
Srikar M wrote:
> what is a repository ???
>
The place where workbench objects are saved
>
Srikar M wrote:
> what are the tables where repository data is saved ????
Many and various. Some not accessible via ABAP.

ARCHITECTURE OF SAP R/3 AND APPLICATION SERVER AND DATABASE SERVER IN ABAP

ARCHITECTURE OF SAP R/3 AND APPLICATION SERVER AND DATABASE SERVER IN ABAP?
PLEASE EXPLAIN

hi
Presentation Server
It is actually a program named sapgui.exe.
It usually installed in users workstation.
The interface accepts the input from the user in the form of keystrokes, mouse-clicks, and function keys, and sends these requests to the application server.
It receives and displays the result from the application server.
Application Server
An application server is a set of executables that collectively interpret the the ABAP/4 programs.
Each application server has a profile called application server profile, that specifies its characteristics when it starts up and while it is running. It specifies:
1. Number of processes and its types.
2.Amount of memory each process may use.
3. Length of time a user is inactive before being automatically logged off.
If your ABAP/4 program requests information from the database, the application server will format the request and send it to the database server
Database Server
The database server is a set of executables that accepts database requests from the application server.
These requests are passed on to the RDBMS (Relation Database Management System).
The RDBMS sends the data back to the application server.
The RDBMS may run on database servers computer or may be installed on its own computer.
The components of application server are dispatcher, dispatcher queue, work process.
All requests that come in from presentation servers are directed first to the dispatcher.
The dispatcher writes them to the dispatcher queue.
The dispatcher pulls the requests from the queue on a first-in, first-out basis.
Each request is then allocated to the first available work process.
A work process handles one request at a time.
The work process needs two memory areas, the user context and the roll area.
The user context is a memory area that contains the information about the user.
The roll area is a memory area that contains about the program execution.
User Context
User context is a memory area that contains the characteristics of a user that is logged on the R/3 system.
1)It holds, users current settings.
2. The users authorizations.
3. The names of the programs the user is currently running.
When a user logs on, the user context is allocated for that logon. When logs off, it is freed.
Roll Area 
A roll area is a memory that is allocated by a work process for an instance of a program.
It holds the information needed by R/3 about the program execution, such as: 1. The values of the variables
2. The dynamic memory allocations
3. The current program pointer.
Each time a user starts a program, a roll area is created for that instance of the program.
If two users are using the same program at the same time, two roll areas will exist-one for each user.
The roll area is freed when the program ends.
Both roll area and the user context play an important roll in dialog processing
pls reward points dor useful ans
regards
vivek
Message was edited by:
 Vivek Saxena

How can I download the data to Application Server and Network Drive

Hi Experts
I am having problem with download the data to Application Server and Network Drive in back ground. its working in foregorund but not in back ground.please suggest me . Thanks for advance.
Thanks & Regards
Raghava

Hi Experts
I am using like this
P_Back is a check box on the selection-screen.
it_fihrst_out-its internal table
sy-batch -Program is running in the background
IF sy-batch IS INITIAL.
    IF p_back = 'X'.
      OPEN DATASET file_01 FOR OUTPUT IN TEXT MODE ENCODING DEFAULT.
      IF sy-subrc = 0.
        LOOP AT it_fihrst_out.
          TRANSFER it_fihrst_out TO file_01.
        ENDLOOP.
      ENDIF.
      CLOSE DATASET file_01.
      CASE sy-subrc.
        WHEN 0.
          WRITE: / file_01, / 'successfully generated.'.
        WHEN OTHERS.
          WRITE: / file_01, 'Unexpected error occurred.'.
      ENDCASE.
    ELSE.
      CALL FUNCTION 'WS_DOWNLOAD'
        EXPORTING
          filename                = file_01
          filetype                = 'ASC'
        TABLES
          data_tab                = it_fihrst_out
        EXCEPTIONS
          file_open_error         = 1
          file_write_error        = 2
          invalid_filesize        = 3
          invalid_type            = 4
          no_batch                = 5
          unknown_error           = 6
          invalid_table_width     = 7
          gui_refuse_filetransfer = 8
          customer_error          = 9
          OTHERS                  = 10.
      CASE sy-subrc.
        WHEN 0.
          WRITE: / file_01, / 'successfully generated.'.
        WHEN 2.
          WRITE: / file_01, 'Output Error: File still open'.
        WHEN OTHERS.
          WRITE: / file_01, 'Unexpected error occurred.'.
      ENDCASE.
    ENDIF.
ELSE.
    LOOP AT it_fihrst_out.
      WRITE:/ it_fihrst_out.
    ENDLOOP.
ENDIF.
This is the code .

To create a new file in application server and transfer data to ti

i am doing the following where i have to create a new file in application server and transfer data to tht file from an internal table.but its saying file cant be opened.the path i am giving to parameter p_prefil is /tmp/prachi.txt.
wats the prob..can anyone help.
DATA:L_WA_FINAL TYPE TY_FINAL,
l_wa_string type string.
OPEN DATASET P_PREFIL FOR OUTPUT IN text mode encoding default.
if sy-subrc <> 0.
write: ' file cannot be opened'.
stop.
endif.
LOOP AT P_I_FINAL INTO L_WA_FINAL.
move l_wa_final to l_wa_string.
TRANSFER l_wa_string TO P_PREFIL.
if sy-subrc <> 0.
write: 'file can not be written'.
stop.
endif.
clear l_wa_final.
ENDLOOP.
CLOSE DATASET P_PREFIL.
if sy-subrc <> 0.
write: ' file cannot be closed'.
stop.
endif.

DATA:L_WA_FINAL TYPE TY_FINAL,
l_wa_string type string.
OPEN DATASET P_PREFIL FOR OUTPUT IN text mode encoding default.
if sy-subrc ne 0.
write: ' file cannot be opened'.
stop.
endif.
LOOP AT P_I_FINAL INTO L_WA_FINAL.
move l_wa_final to l_wa_string.
TRANSFER l_wa_string TO P_PREFIL.
write: 'file can not be written'.
clear l_wa_final.
ENDLOOP.
CLOSE DATASET P_PREFIL.
if sy-subrc ne 0.
write: ' file cannot be closed'.
stop.
endif.

What is an Instance in application server and how to create an Instance?

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