Sql Server Load Balancer

  • Jagz W

    SSC Enthusiast

    Points: 147

    Hi all,

    My company is planing to implement load balancer for HTTP requests in case to increase the performance of website. We have two different servers, one is for website hosting and another is database server (sql 2008).

    As the website is having 80% of database operations, Does http load balancer will work? or Does we should have two load balancer , One if for HTTP requests and other is for sql server? Or can one load balancer will work for these two?

  • Gail Shaw

    SSC Guru

    Points: 1004424

    You can't load balance two or more SQL Servers without huge amounts of work to keep the two databases in sync eg though (peer-to-peer replication). A HTTP load balancer requires two or more web servers, if there's only one web server, there's nothing to balance the load across.

    Typically you'd load balance a group of web servers and they'd all talk to a single SQL Server, probably a more powerful server.

    Gail Shaw
    Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
    SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

    We walk in the dark places no others will enter
    We stand on the bridge and no one may pass
  • Jagz W

    SSC Enthusiast

    Points: 147

    We have one web server and one database server. The web server is then divided into virtual machine. Load balance r will manage the loads between virtual machines.

    my question is can we balance the load in sql server?

  • Gail Shaw

    SSC Guru

    Points: 1004424

    GilaMonster (2/18/2012)


    You can't load balance two or more SQL Servers without huge amounts of work to keep the two databases in sync eg though (peer-to-peer replication).

    Typically you'd load balance a group of web servers and they'd all talk to a single SQL Server, probably a more powerful server.

    That said, peer-to-peer replication is a SQL 2005+ feature, I assume you have SQL 2000 since you posted in the SQL 2000 forums. If that's the case, the best advice I can give is upgrade to something less than 10 years old.

    Gail Shaw
    Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
    SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

    We walk in the dark places no others will enter
    We stand on the bridge and no one may pass

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