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Forum Discussion

jay_41157's avatar
jay_41157
Icon for Nimbostratus rankNimbostratus
Jan 28, 2009

GTM LB

Hi,     So this is what I have.     wideip.com --> wideip_pool ( at GMT)     wideip_pool --> site 1 ratio(1) / site 2ratio(1) with static persist.     ...
config
design
JRahm's avatar
JRahm
Icon for Admin rankAdmin
Jan 28, 2009
1:1 ratio might as well be round robin. Keep in mind that at the global layer, the GTM is handing out resolutions to LDNS servers, so if you have 5 LDNS resolutions, 3 would go to site 1 and 2 would go to site 2. Now, if 90% of your clients happen to be servered by the 3 LDNS servers that are pinned to site 1 (until TTL expires or your persistence record expires), then you won't be at a 50% distribution at all, or even close. If you want even distribution across both datacenters, you're probably better off putting all the virtuals from both datacenters in a single pool and using the least connections, packet rate, or kbps load balancing mechanism.