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How Does: Load Balancing get impacted when R/W server lag in replication

 

How Does: Load Balancing get impacted when R/W server lag in replication

 
Release Classification Level DB Platform Categories
Uptill 3.10.1.2 Information

MySQL Load Balancing
  
QUESTION

Consider that the RW server in the ScaleArc cluster is showing replication lag (as it is a slave of another DB server), what will be the effect on load balancing decision?

ANSWER

If this is the ONLY R/W server in the cluster then -
  • Write traffic will not get affected, will not see any skew by ScaleArc and be directed to that R/W server.
  • Read traffic will undergo skew for that R/W server and will not be favored.


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Permalink: https://support.scalearc.com/kb/articles/4084