Database mirroring with witness server and availability set

Hi,
I got two VMs Sql1 and Sql2 with mirroring between them, they are in the same availability to achieve 99.95% SLA.
My mirroring config requires a witness server, while configuring a witness server you can specify only one server.
From what I read online load balancing two witness servers and providing the load balancer ip as the witness server will not work.(is that right? or I can do that?)
Anyway, how can i make sure the witness server(since it doesn't have a partner) has 99.95% SLA?
Thank You!

Thanks Manesh.
Availability set ensures that not all the VMs in the Availability set will go down at the same time, and it's possible that only one VM in the Availability set will stay online.
Therefore, if I will put the two partners and the witness in one Availability set there is the chance that both partners will be down at the same time.
On the contrary, if the witness will be out of the Availability set, I can be sure that one partner will always be online.
So including the witness server in the availability set will hurt the High Availability of the database.
Always remember that only VMs that do the exact same job should be in the same Availability set.

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http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_technical_reference09186a00801444a1.html
==============================================================
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==============================================================
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Can't I just set up Exchange as one of my calendars in ical?
Only if you're running Snow Leopard and your employer will allow access (different than iPhone/mobile device access, so most likely not), but not needed - keep reading.
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Waiting for some replies :-)

1)For the witness server should the SQL server be dedicated to the LYNC infrastructure or it can be used
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It Can be used to host other database
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Yes
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express edition ?
http://technet.microsoft.com/en-us/library/gg398990.aspx
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I am new to oracle.
Mine is home PC and the spec. of the system are as follows.
database:Oracle 8i EE
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OS :Windows 2000
Yesterday I downloaded Oracle9iAS Server and followed the documentation in installing.
As per the documentation, I accepted default values in many cases and went thru with installation.
At the end of the installation, i got the following config(found at the bottom of the message).
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Configuration Steps for Oracle Forms installation of 00:44:38 2002/05/01
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Thanks, Vikas!
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Hi,
Look at this code hope this will help you to solve your problem
REPORT y_test_559.
Program for
1. Downloading Data of any DB table to a tab delimited ASCII file
2. Checking if a tab delimited ASCII file has the structure of a
   DB table and showing its contents
3. Uploading a tab delimited ASCII file to a DB table with the same
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4. Showing the data of any DB table
======================================================================
======================================================================
DATA DECLARATIONS
======================================================================
TYPES : data_object TYPE REF TO data.
DATA : itab TYPE REF TO data .
TYPE-POOLS : slis .
DATA : it_fieldcat TYPE STANDARD TABLE OF slis_fieldcat_alv
        WITH HEADER LINE .
DATA : it_fieldcatalog TYPE lvc_t_fcat .
DATA : wa_fieldcatalog TYPE lvc_s_fcat .
DATA : i_structure_name LIKE dd02l-tabname .
DATA : i_callback_program LIKE sy-repid .
DATA : dyn_line TYPE data_object .
FIELD-SYMBOLS : <fs_itab> TYPE STANDARD TABLE .
DATA : table_name_is_valid TYPE c .
DATA : dynamic_it_instantiated TYPE c .
CONSTANTS buttonselected TYPE c VALUE 'X' .
======================================================================
SELECTION SCREEN DEFAULT
======================================================================
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) t_tabl.
PARAMETERS : tabl_nam LIKE rsrd1-tbma_val
             MATCHCODE OBJECT dd_dbtb_16 OBLIGATORY .
                               "Search for Database Tables is dd_dbtb_16
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) t_file.
PARAMETERS : file_nam LIKE rlgrap-filename .
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) t_down.
PARAMETERS : p_downld RADIOBUTTON GROUP grp1
             USER-COMMAND m_ucomm .
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) t_chkf.
PARAMETERS : p_chkfil RADIOBUTTON GROUP grp1 .
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) t_upld.
PARAMETERS : p_upload RADIOBUTTON GROUP grp1 .
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) t_show.
PARAMETERS : p_show_t RADIOBUTTON GROUP grp1 ."show table data
SELECTION-SCREEN END OF LINE.
======================================================================
AT SELECTION SCREEN OUTPUT
======================================================================
AT SELECTION-SCREEN OUTPUT .
PERFORM check_filename .
======================================================================
AT SELECTION SCREEN ON VALUE REQUEST FOR FILENAME
======================================================================
AT SELECTION-SCREEN ON VALUE-REQUEST FOR file_nam .
PERFORM f4_for_filename .
======================================================================
Initialization .
======================================================================
INITIALIZATION .
t_tabl = 'Table Name' .
t_file = 'File Name' .
t_down = 'Download Table' .
t_chkf = 'Check File to Upload' .
t_upld = 'Upload File' .
t_show = 'Show Table Contents' .
======================================================================
START OF SELECTION
======================================================================
START-OF-SELECTION .
PERFORM check_table_name_is_valid .
======================================================================
END OF SELECTION
======================================================================
END-OF-SELECTION .
IF table_name_is_valid EQ ' ' .
    MESSAGE i398(00) WITH 'INVALID TABLE NAME' .
ELSE .
    PERFORM instantiate_dynamic_internal_t .
    CHECK dynamic_it_instantiated = 'X' .
    CASE buttonselected .
      WHEN p_downld .
        PERFORM select_and_download .
      WHEN p_chkfil .
        PERFORM check_file_to_upload .
      WHEN p_upload .
        PERFORM upload_from_file .
      WHEN p_show_t .
        PERFORM show_contents .
    ENDCASE .
ENDIF .
*&      Form CHECK_TABLE_NAME_IS_VALID
      text
--> p1        text
<-- p2        text
FORM check_table_name_is_valid.
DATA l_count TYPE i .
TABLES dd02l .
CLEAR table_name_is_valid .
SELECT COUNT(*) INTO l_count FROM tadir
WHERE pgmid = 'R3TR'
AND    object = 'TABL'
AND    obj_name = tabl_nam .
IF l_count EQ 1 .
    CLEAR dd02l .
    SELECT SINGLE * FROM dd02l WHERE tabname = tabl_nam .
    IF sy-subrc EQ 0.
      IF dd02l-tabclass = 'TRANSP' .
        table_name_is_valid = 'X' .
      ENDIF .
    ENDIF.
ENDIF .
ENDFORM.                    " CHECK_TABLE_NAME_IS_VALID
*&      Form SELECT_AND_DOWNLOAD
      text
--> p1        text
<-- p2        text
FORM select_and_download.
CLEAR : <fs_itab> .
SELECT * FROM (tabl_nam)
INTO CORRESPONDING FIELDS OF TABLE <fs_itab>   .
PERFORM check_filename.
CALL FUNCTION 'WS_DOWNLOAD'
    EXPORTING
      filename                = file_nam
      filetype                = 'DAT'
    TABLES
      data_tab                = <fs_itab>
    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.
IF sy-subrc EQ 0.
    MESSAGE i398(00) WITH 'Table' tabl_nam
                          'successfully downloaded to '
                          file_nam .
ENDIF.
ENDFORM.                    " SELECT_AND_DOWNLOAD
*&      Form UPLOAD_FROM_FILE
      text
--> p1        text
<-- p2        text
FORM upload_from_file.
DATA : ans TYPE c .
DATA : lines_of_itab TYPE i .
DATA : l_subrc TYPE i .
CALL FUNCTION 'POPUP_TO_CONFIRM_STEP'
    EXPORTING
      textline1 = 'Are you sure you wish to upload'
      textline2 = 'data from ASCII File to DB table '
      titel     = 'Confirmation of Data Upload'
    IMPORTING
      answer    = ans.
IF ans = 'J' .
    PERFORM check_filename.
    CLEAR l_subrc .
    CALL FUNCTION 'WS_UPLOAD'
      EXPORTING
        filename                = file_nam
        filetype                = 'DAT'
      TABLES
        data_tab                = <fs_itab>
      EXCEPTIONS
        conversion_error        = 1
        file_open_error         = 2
        file_read_error         = 3
        invalid_type            = 4
        no_batch                = 5
        unknown_error           = 6
        invalid_table_width     = 7
        gui_refuse_filetransfer = 8
        customer_error          = 9
        OTHERS                  = 10.
    l_subrc = l_subrc + sy-subrc .
    IF sy-subrc EQ 0.
      DESCRIBE TABLE <fs_itab> LINES lines_of_itab .
      IF lines_of_itab GT 0 .
        DELETE (tabl_nam) FROM TABLE <fs_itab> .
        COMMIT WORK .
        INSERT (tabl_nam) FROM TABLE <fs_itab> .
        l_subrc = l_subrc + sy-subrc .
      ENDIF .
    ENDIF.
    IF l_subrc EQ 0 .
      MESSAGE i398(00) WITH lines_of_itab
                           'Record(s) inserted in table'
                            tabl_nam .
    ELSE .
      MESSAGE i398(00) WITH
                      'Errors occurred No Records inserted in table'
                       tabl_nam .
    ENDIF .
ENDIF .
ENDFORM.                    " UPLOAD_FROM_FILE
*&      Form F4_FOR_FILENAME
      text
--> p1        text
<-- p2        text
FORM f4_for_filename.
CALL FUNCTION 'WS_FILENAME_GET'
    EXPORTING
      def_path         = 'C:\'
      mask             = ',.,..'
      mode             = '0'
    IMPORTING
      filename         = file_nam
    EXCEPTIONS
      inv_winsys       = 1
      no_batch         = 2
      selection_cancel = 3
      selection_error = 4
      OTHERS           = 5.
ENDFORM.                    " F4_FOR_FILENAME
*&      Form CHECK_FILENAME
      text
--> p1        text
<-- p2        text
FORM check_filename.
IF file_nam IS INITIAL
AND NOT ( tabl_nam IS INITIAL )
AND p_show_t NE buttonselected.
    CONCATENATE 'C:\' tabl_nam '.TXT' INTO file_nam.
ENDIF .
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*&      Form INSTANTIATE_DYNAMIC_INTERNAL_T
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--> p1        text
<-- p2        text
FORM instantiate_dynamic_internal_t.
CLEAR dynamic_it_instantiated .
-----> Step 1 - Finding Field Names and ALV GRID Fieldcatalog
i_structure_name = tabl_nam .
CLEAR it_fieldcat[] .
CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name       = i_structure_name
    CHANGING
      ct_fieldcat            = it_fieldcat[]
    EXCEPTIONS
      inconsistent_interface = 1
      program_error          = 2
      OTHERS                 = 3.
IF sy-subrc EQ 0.
-----> Step 2 - Creating Field Catalog of the Object
                                              cl_alv_table_create
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      CLEAR wa_fieldcatalog .
      MOVE-CORRESPONDING it_fieldcat TO wa_fieldcatalog .
      wa_fieldcatalog-ref_field = it_fieldcat-fieldname .
      wa_fieldcatalog-ref_table = tabl_nam .
      APPEND wa_fieldcatalog TO it_fieldcatalog .
    ENDLOOP .
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        it_fieldcatalog = it_fieldcatalog
      IMPORTING
        ep_table        = itab.
    ASSIGN itab->* TO <fs_itab> .
    dynamic_it_instantiated = 'X' .
ENDIF.
ENDFORM.                    " INSTANTIATE_DYNAMIC_INTERNAL_T
*&      Form SHOW_CONTENTS
      text
--> p1        text
<-- p2        text
FORM show_contents.
CLEAR : <fs_itab> .
SELECT * FROM (tabl_nam)
INTO CORRESPONDING FIELDS OF TABLE <fs_itab>   .
i_callback_program = sy-repid .
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
    EXPORTING
      i_callback_program = i_callback_program
      it_fieldcat        = it_fieldcat[]
    TABLES
      t_outtab           = <fs_itab>
    EXCEPTIONS
      program_error      = 1
      OTHERS             = 2.
ENDFORM.                    " SHOW_CONTENTS
*&      Form CHECK_FILE_TO_UPLOAD
      text
--> p1        text
<-- p2        text
FORM check_file_to_upload.
PERFORM check_filename.
CLEAR l_subrc .
CALL FUNCTION 'WS_UPLOAD'
    EXPORTING
      filename                = file_nam
      filetype                = 'DAT'
    TABLES
      data_tab                = <fs_itab>
    EXCEPTIONS
      conversion_error        = 1
      file_open_error         = 2
      file_read_error         = 3
      invalid_type            = 4
      no_batch                = 5
      unknown_error           = 6
      invalid_table_width     = 7
      gui_refuse_filetransfer = 8
      customer_error          = 9
      OTHERS                  = 10.
l_subrc = l_subrc + SY-SUBRC .
IF sy-subrc EQ 0.
    i_callback_program = sy-repid .
    CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
      EXPORTING
        i_callback_program = i_callback_program
        it_fieldcat        = it_fieldcat[]
      TABLES
        t_outtab           = <fs_itab>
      EXCEPTIONS
        program_error      = 1
        OTHERS             = 2.
ENDIF .
ENDFORM.                    " CHECK_FILE_TO_UPLOAD
Thanks,
Pramod

Creating a simpel network with Lion Server, and add Windows XP computers to it

We have a Mac Lion Server and 3 computers with Windows XP. Previously we had a Windows 2003 server with a domain name: "MYDOMAIN". When logging into Windows it logs into this domain.
I would like to replace this Windows 2003 server with my new Mac Lion server so, I build up a test setup. I connected the Mac Lion server (iMac) with my Windows XP pc with an ethernet cable. Then, I setup a DHCP, DNS and Open directory in the Server Admin. Added users. I configured the IP adres of the server to a static one by setting the IPv4 to "using DHCP with manual address".
Then I wanted to let my Windows XP server join the domain of the Lion Server, however I cannot let my Windows XP client connect to the domain of the Lion Server.
I read in the advanced administration that you can set up Windows XP for domain login. Where do I find the name of this domain? It should be stated in the server admin, open directory, settings, general tab, but the only thing I find here is: Role: Open Directory Master.
In Windows XP, when I explore in explorer the Microsoft-Windows Network I can see in "MYDOMAIN" the MacLion Server and my Windows XP pc. So sharing files is no problem.
However, I really want to create a new domain with my Lion Server and let the Windows XP pc's login to the new domain.
I hope anyone can help me.

Thanks for the info.
I read some stuff about this indeed, so I was thinking, because we have a small network, could it be possible to share files on the server via a workgroup?
If we add the 3 Windows XP pc's to the same workgroup as the Lion Server, would there be a problem?
Then at startup of Windows XP, should we login to the pc instead of the domain? And where would I find the Lion server in Windows XP?

Database link with the alias and full description in the connect string

Hi,
i have created database link with alias in tnsentry and full description
and suppose i have removed the tnsnames.ora file what will be the impact on the database link that is whether database link will work or not i am sure db link created with alias won't work and how about db link created with full description and which one you prefer
Thanks

# Parameter file initora for Database prd
### Global database name is db_name.db_domain
global_names = TRUE
db_name = prd
db_domain = world
# TNSNAMES.ORA for prd ###############################
prd.world = (DESCRIPTION = (ADDRESS = (COMMUNITY = tcp.world)
(PROTOCOL = TCP) (Host = 100.10.100.1) (Port = 1521))
(CONNECT_DATA = (SID = prd) (GLOBAL_NAME = prd.world)
(SERVER = DEDICATED)))
Our database link points from the local database test to the remote database prd. Therefore we need the global database name for prd. Ask the remote database administrator for these information or connect to prd and execute the following query on prd:
SQL> select GLOBAL_NAME from GLOBAL_NAME;
GLOBAL_NAME
prd.WORLD
CREATE DATABASE LINK prd
CONNECT TO system IDENTIFIED BY system_passwd
USING 'prd';--- alias
so the connection description will be ---select ename from [email protected]
useful link
http://www.akadia.com/services/ora_dblinks.html

Database mirroring with witness server and availability set

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