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genseek_32178's avatar
genseek_32178
Icon for Nimbostratus rankNimbostratus
Feb 18, 2014

LB Query

Hi Experts,

 

Have a question on Weigted Round Robin LB method.. Say, there is a VIP1 with 3 pool servers behind it Sr1, Sr2, Sr3. Configuration is 10:5:2 respectively (out of 10 connections, first 10 connections go to Sr1, next 5 to Sr2, and last 2 would reach Sr3. Is this correct? What happens if one server Sr3 is removed for maintenance? How will the traffic be routed now between the other 2 pool servers?

 

thanks-genseek

 

TMOS

1 Reply

  • Kevin_Stewart's avatar
    Kevin_Stewart
    Icon for Employee rankEmployee
    Feb 18, 2014

    out of 10 connections, first 10 connections go to Sr1, next 5 to Sr2, and last 2 would reach Sr3. Is this correct?

     

    Actually no. It's a ratio, so in this case for every 10 requests to Sr1, send 5 to Sr2, and 2 to Sr3. The math gets a little complicated of course as you add more ratios, so if you break it down to just the first two members (10:5), it'd be like for every 2 requests to the Sr1, send 1 to Sr2. If you remove Sr3, then you still have a 10:5 ratio between the remaining members. If you remove Sr2, then you should have a 10:2 ratio between the remaining members.