Universal persistence in GTM

Question

Hi, can we apply iRule for universal persistence in GTM based on jsession ID?&nbsp;
when HTTP_REQUEST {
 set jsess [URI::query [HTTP::uri] vi]
 if { $jsess != "" } {
 persist uie $jsess 600
 }
}&nbsp;
Will it work to persist in same DC even though Round Robin is selected for GTM load balancing with TTL of 30 ?&nbsp;

richard__harlan · Accepted Answer

There is a persistence setting in GTM under the WideIP you can set how long the GTM will persist the request&nbsp;
http://support.f5.com/kb/en-us/products/big-ip_gtm/manuals/product/gtm_config_guide_10/gtm_connections.html?sr=317015371010565&nbsp;

pranav_73262 · Answer

client should persist to same DC for around 10 minutes.

richard__harlan · Answer

GTM works on DNS it will not see the JSESSION ID as this will only happen on HTTP request/response. Now GTM sees the the DNS look up from the LDNS servers, you can persist all query's from the same LDNS to the DC in question. Now if there is a persistence entry it will over ride the LB setting of Round Robin and send the request to the correct DC.

pranav_73262 · Answer

Thanks Richard. By 'you can persist all query's from the same LDNS to the DC in question'; are you suggesting TTL value modification or some thing else? Please suggest the way to configure, if otherwise.

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Universal persistence in GTM

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