RE: [load balancing] (alteon) - Web Servers to Database issue

From: Jose Vitor Barreiro (Vitor.BarreiroIZZATcompta.pt)
Date: Thu Jul 01 2004 - 09:31:33 EDT


Hi,
Software Version 21.0.4
 

Vitor Barreiro

  _____

From: Hasan Dilmaç [mailto:hasanIZZATprolink.com.tr]
Sent: quinta-feira, 1 de Julho de 2004 11:51
To: lb-lIZZATvegan.net
Subject: RE: [load balancing] (alteon) - Web Servers to Database issue

Hi Vitor,
What is the software version of 2424 ssl ?
 
-Hasan

        -----Original Message-----
        From: owner-lb-lIZZATvegan.net [mailto:owner-lb-lIZZATvegan.net] On Behalf Of Jose Vitor Barreiro
        Sent: Wednesday, June 30, 2004 12:05 PM
        To: lb-lIZZATvegan.net
        Subject: RE: [load balancing] (alteon) - Web Servers to Database issue
        
        
        Hi,
         
        I`m going to try to answer your questions:
        - In the alteon, for that two web servers i only have a VIP with HTTP service. The comunication between the WebServers and Database Server (Oracle) are only L2 and L3, and individually.
        For exemple: There are a HTTP request from a client to one of the WebServer and When the WebServer needs some data from the DatabaseServer (DBServer), it established a connection using the TCP port 1521 (TNS protocol) to get that data information. The WebServer ip address 192.168.1.5 tries to connect with DBServer 192.168.1.9 in the DMZ, and the firewall translate that address (NAT) to the real ip address 10.0.10.30 of the (DBServer). This works fine when i only have one WebServer doing that request to the DBserver, because when i have the two WebServers requesting information from the WebServer 5% of the times the connections fails.

         

         

        Vitor Barreiro

         

  _____

        From: Adilson Lemos [mailto:adilsonlIZZATcorp.globo.com]
        Sent: terça-feira, 29 de Junho de 2004 18:12
        To: lb-lIZZATvegan.net
        Subject: RE: [load balancing] (alteon) - Web Servers to Database issue
        
        
        Vitor,
         
        Well, some questions:
         
        1 - both webservers can connect to database ? If you enter in the each web server and execute telnet to database on the port 1521 you have success ?
        2 - Based on the question above, through telnet and client access to webservers the request from webservers are being to database with some ip address of the source or not ?
        3 - Are you receiving any type of error from Database ? if yes which will be ?
         
        Adilson Lemos.
         

                -----Original Message-----
                From: Jose Vitor Barreiro [mailto:Vitor.BarreiroIZZATcompta.pt]
                Sent: Tuesday, June 29, 2004 11:25 AM
                To: lb-lIZZATvegan.net
                Subject: RE: [load balancing] (alteon) - Web Servers to Database issue
                
                
                Hi Adilson,
                 
                I configured the hash metric and I still have the same issue.
                The Web Servers and the database server use the TNS - Transparent Network Substrate Protocol to communicate between them.
                I don´t known if this can help you, helping me to find the source of the problem and the solution?
                 
                 

                Vitor Barreiro

  _____

                From: Adilson Lemos [mailto:adilsonlIZZATcorp.globo.com]
                Sent: terça-feira, 29 de Junho de 2004 6:18
                To: lb-lIZZATvegan.net
                Subject: RE: [load balancing] (alteon) - Web Servers to Database issue
                
                
                Vitor,
                 
                One way would be configuring hash metric for the group.
                 
                Adilson Lemos.

                        -----Original Message-----
                        From: Jose Vitor Barreiro [mailto:Vitor.BarreiroIZZATcompta.pt]
                        Sent: Tuesday, June 22, 2004 5:46 AM
                        To: lb-lIZZATvegan.net
                        Subject: [load balancing] (alteon) - Web Servers to Database issue
                        
                        
                        Hi
                         
                         
                        I have a alteon AA2424SSL balancing some Web Servers. One of the groups have two Web Servers. That Web Servers are in the DMZ and they need to pick up some data(text, pictures, etc) from one database server in the LAN. With only one server working in the group everything since to work ok, but with the two web servers active some times some of the connections between the Web Servers and the Database Server fails. Anyone have a clue of what could be the cause of this.
                         
                         
                        Simple diagram of the network:
                         
                        Client ------>FW--------AAS2424SSL --------------Web1
                                           ! !---------------Web2
                                    SW Core
                                           !
                                           !
                                     Database
                                       Server
                         
                         
                        Regards
                         
                         

                        Vitor Barreiro

                         
                        
                        
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                MAILsweeper - Modulo da suite MIMEsweeper, solucao de filtragem de conteudos comercializada pela Compta SA.
                
                A Compta SA detem o mais alto nivel de especializacao MIMEsweeper, tendo sido reconhecida pela Clearswift como Premier Partner.
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                This message is confidential and may contain privileged information intended solely for the named addressee(s). It may not be used or disclosed except for the purpose for which it has been sent.
                
                If you are not the intended recipient, you must not copy, distribute or take any action in reliance on it. If you have received this message in error, please notify Compta by emailing postmasterIZZATcompta.pt quoting the sender and delete the message and any attached documents.
                
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        Este email assim como os ficheiros que possa ter em anexo sao confidenciais e para uso exclusivo da pessoa ou organizacao para o qual foi enviado. Se recebeu esta mensagem por engano por favor notifique a Compta atraves do endereco postmasterIZZATcompta.pt
        
        Esta mensagem foi verificada pelo sistema MAILsweeper nao tendo sido encontrados virus. http://www.mimesweeper.com
        
        MAILsweeper - Modulo da suite MIMEsweeper, solucao de filtragem de conteudos comercializada pela Compta SA.
        
        A Compta SA detem o mais alto nivel de especializacao MIMEsweeper, tendo sido reconhecida pela Clearswift como Premier Partner.
        ***************************************************************************
        This message is confidential and may contain privileged information intended solely for the named addressee(s). It may not be used or disclosed except for the purpose for which it has been sent.
        
        If you are not the intended recipient, you must not copy, distribute or take any action in reliance on it. If you have received this message in error, please notify Compta by emailing postmasterIZZATcompta.pt quoting the sender and delete the message and any attached documents.
        
        This footnote confirms that this email message has been swept by MIMEsweeper for Content Security threats, including computer viruses
        ***************************************************************************
        

***************************************************************************
Este email assim como os ficheiros que possa ter em anexo sao confidenciais e para uso exclusivo da pessoa ou organizacao para o qual foi enviado. Se recebeu esta mensagem por engano por favor notifique a Compta atraves do endereco postmasterIZZATcompta.pt

Esta mensagem foi verificada pelo sistema MAILsweeper nao tendo sido encontrados virus. http://www.mimesweeper.com

MAILsweeper - Modulo da suite MIMEsweeper, solucao de filtragem de conteudos comercializada pela Compta SA.

A Compta SA detem o mais alto nivel de especializacao MIMEsweeper, tendo sido reconhecida pela Clearswift como Premier Partner.
***************************************************************************
This message is confidential and may contain privileged information intended solely for the named addressee(s). It may not be used or disclosed except for the purpose for which it has been sent.

If you are not the intended recipient, you must not copy, distribute or take any action in reliance on it. If you have received this message in error, please notify Compta by emailing postmasterIZZATcompta.pt quoting the sender and delete the message and any attached documents.

This footnote confirms that this email message has been swept by MIMEsweeper for Content Security threats, including computer viruses
***************************************************************************

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