Forum Discussion

Colin_17209's avatar
Colin_17209
Icon for Nimbostratus rankNimbostratus
Sep 06, 2007

WLB Questions

Hi,

 

 

I've a question if BIG-IP WLB can be used to support this type of scenario. Client access to DC 1 using URL via Internet that has a roundtrip of 30m/s. However DC2 is hosting the web contents and DC1 has to retrieve the contents from DC2 via Private network that has a roundtrip of 20m/s. Total roundtrip for the request will be 50m/s

 

 

If Client access directly to DC 2, the roundtrip is only 40m/s

 

 

 

Client---------30m/s------->DC 1 -----

 

| |

 

| | 20m/s

 

-------------40m/s------->DC 2 -----

 

| |

 

| |30m/s

 

-------------50m/s------->DC 3 -----

 

 

 

Is F5 WLB capable of routing the request directly to DC2 with all the calculations in mind? Or is there some custom parameters that can be configured in the device to force routing to DC2?
config
design
  • James_Thomson's avatar
    James_Thomson
    Icon for Employee rankEmployee
    Sep 10, 2007
    I don't believe so, but the calculation wouldn't necessarily be accurate if I could do this because there could always be a hiccup in the DC1 to DC2 transaction. The best way I could think to do it would be to realize that that the content actually resides in DC2 and redirecting the user to go get it there himself.

     

    For example, instead of having the server in DC1 go get the data from DC2, redirect the user to go get it there himself. I don't know enough about your app, but I'm thinking along the lines of for the stuff that is only in DC2, it would be in a unique folder like "http://url.site.com/specialapp/page.jsp". Tell BIG-IP to look for things in "/specialapp/" and issue a redirect to DC2 for that content. You could do this with an HTTP Class(version9.4) or iRule.