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Connect Remotely Database [message #465476]

Wed, 14 July 2010 05:24

usmanelahi
Messages: 54
Registered: July 2007
Location: Karachi

Member

Hello Gurus,

i have a inventory system and trying to connect remote database one by one throught two static ips. If first ip is not ping then go to 2nd ip only when open the login.fmx page

following examples are my tnsnames.ora

IP1.WORLD =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 117.65.48.12)(PORT = 1521))
(CONNECT_DATA = (SID = ORCL))
)

IP2.WORLD =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 117.65.48.13)(PORT = 1521))
(CONNECT_DATA = (SID = ORCL))
)

i am not understand what i write the code on-logon trigger

please help me if you can do it

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Re: Connect Remotely Database [message #465497 is a reply to message #465476]

Wed, 14 July 2010 06:46

Littlefoot
Messages: 21823
Registered: June 2005
Location: Croatia, Europe

Senior Member
Account Moderator

Check the LOGON built-in, perhaps it'll help.

How could you do that: create the ON-LOGON trigger and connect to the first database:

-- ON-LOGON trigger
logon('user_name@ip1', 'pass_word', false);

Note the FALSE value of the "logon screen on error" parameter - it will make it possible to connect to another database (eventually) without displaying a message to end user.

If it fails, error will be raised - handle it in the ON-ERROR trigger:

-- ON-ERROR trigger
logon('user_name@ip2', 'pass_word', true);

See how it works, adjust if necessary.

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Re: Connect Remotely Database [message #465507 is a reply to message #465476]

Wed, 14 July 2010 07:58

John Watson
Messages: 8964
Registered: January 2010
Location: Global Village

Senior Member

Could you do it more simply by using Oracle Net's fault tolerance? I would normally include load balancing too. No need for anything in your application, just one tnsnames entry:

IP.WORLD =
(DESCRIPTION =
(address_list=
(failover=on)
(load_balance=on)
(ADDRESS = (PROTOCOL = TCP)(HOST = 117.65.48.12)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 117.65.48.13)(PORT = 1521))
)
(CONNECT_DATA = (SID = ORCL))
)

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Re: Connect Remotely Database [message #465513 is a reply to message #465507]

Wed, 14 July 2010 08:18

usmanelahi
Messages: 54
Registered: July 2007
Location: Karachi

Member

thank you very much for post this simple code i will test this code tomorrow hope it will work fine thankyou once again

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Re: Connect Remotely Database [message #465549 is a reply to message #465513]

Wed, 14 July 2010 12:17

Littlefoot
Messages: 21823
Registered: June 2005
Location: Croatia, Europe

Senior Member
Account Moderator

Sounds very interesting and - above all - useful, John! It was something new for me; thank you!

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Re: Connect Remotely Database [message #465567 is a reply to message #465549]

Wed, 14 July 2010 16:12

babuknb
Messages: 1736
Registered: December 2005
Location: NJ

Senior Member

Thanks John ! Something new today learned from you Smile

Babu

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Re: Connect Remotely Database [message #465644 is a reply to message #465507]

Thu, 15 July 2010 01:14

usmanelahi
Messages: 54
Registered: July 2007
Location: Karachi

Member

I have check the code from Oracle9i tnsnames.ora error are attached and if i ping from developer6i tnsnames.ora file then error show failed to resolve name..

Attachment: oracle9i.JPG
(Size: 33.48KB, Downloaded 1703 times)

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Re: Connect Remotely Database [message #465648 is a reply to message #465644]

Thu, 15 July 2010 01:23

Michel Cadot
Messages: 68733
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

So post your tnsnames.ora, you have a syntax/parenthesis missing error.

Regards
Michel

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Re: Connect Remotely Database [message #467115 is a reply to message #465648]

Thu, 22 July 2010 05:04

usmanelahi
Messages: 54
Registered: July 2007
Location: Karachi

Member

yes its working i remove the systex (address_list=

thank you very much great job

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