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Linux, Apache, MySQL, PHP

 
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QuestionFailover Architecture (Apache/TOMCAT) Pin
Member 143600218-May-19 3:21
MemberMember 143600218-May-19 3:21 
Hi all, I'm trying to understand the following failover and clustering architecturthe, but I can not understand why on the Main server side we have 3 physicals Tomcat aplications servers and 1 physical Apache Server indicating a direct connection wiht another Apache at the Frontend? I'm confused with the architecture. Can you maybe please help me understand the infrastructure shown in att pic? Which server performs load balancing and HA?

Best regards

    Apache Frontal
      /        \
Apache1     Apache2
    |          |
TOMCAT1     TOMCAT1
    |          |
TOMCAT2     TOMCAT2
    |          |
TOMCAT3     TOMCAT3


modified 9-May-19 11:38am.

Questionwhat is the error:mysqli_query() expects parameter 1 to be mysqli, null given in Pin
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AnswerRe: what is the error:mysqli_query() expects parameter 1 to be mysqli, null given in Pin
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AnswerRe: what is the error:mysqli_query() expects parameter 1 to be mysqli, null given in Pin
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Questionany latest api for currency converter free Pin
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QuestionConvert the sql query into linq Pin
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Questionwhat is the error : SQL syntax; check the manual that corresponds to your MariaDB server version? Pin
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QuestionStored procedure is needed Pin
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