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QuestionStoring Array in the Profile of Web.config Pin
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QuestionDeploying Zero DownTime Updates in production ... Pin
SandeshLohar7313-Jun-08 2:34
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Mark Churchill15-Jun-08 20:28
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SandeshLohar7316-Jun-08 0:50
SandeshLohar7316-Jun-08 0:50 
Hi Mark,

Thanks for your help...

I think there are few problems with the approach you suggested as added inline ..

Can you configure affinity groups in F5 and split your farm based on version?
Assuming the Affinity is turned on, if we split the Farm into two, this will lead to two
separate Virtual IPs (I mean one for load balancer serving the older version of the web farm
& another for the newer version…), which may not be desirable..

How many nodes do you have? Is there any time during the day where your load is light enough that you can drain-stop onto a subset of machines (say half), update half, bring the "updated half" online, drain-stop the "old half", then update?
Assuming the nodes is even number N,(which implies half the nodes i.e. N/2 are serving the older
version [say A], with the other half i.e. N/2 serving the newer version[say B]), when the
offline nodes,(N/2) for B are brought online, with corresponding nodes N/2 for A set to drain
out, these N/2 nodes for A will stop receiving any further new requests, but continue to process
the exiting requests. Now the problem with this is, the moment, drain out/stop has been
configured, & user has posted back a form, this postback request will be routed to the some
other node maybe from set B, despite the affinity being turned…- which still leaves our
initial question unanswered - one, where original request was server by a older version node,
but its postback is being routed to a newer version node…

Please let me know, if there is any indiscrepancy in my understanding …

Regards,
Sandesh
GeneralRe: Deploying Zero DownTime Updates in production ... Pin
Mark Churchill17-Jun-08 22:04
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QuestionHow we can get web browser height and width information on the same page Pin
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QuestionServer.CreateObject Failed Pin
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QuestionI need code JavaScript auto Images and Link for Advetisment Pin
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QuestionEmail Search Engine Pin
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QuestionHalting JS Ajax events from firing Pin
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QuestionHow do I make a website 'Live'. Pin
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QuestionFacebook Login protection? Pin
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QuestionIIS and Portal Problems Pin
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