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Reply #16: That looks like update lag in their server farm [View All]

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unc70 Donating Member (1000+ posts) Send PM | Profile | Ignore Thu Jan-10-08 03:46 PM
Response to Reply #14
16. That looks like update lag in their server farm
Translated (and somewhat simplified):

Most large sites have many computers which act as web servers in a "server farm".

When your request to refresh the page arrives at their site, it is routed to the next available machine which then sends you the latest version of that page _which that machine has_. For performance and other reasons, the servers refresh their copies of pages at slightly different times from each other. It appears that your refresh requests were sometimes alternating between a mahine that had been "refreshed" and one still running the previous version.

This behavior could also be the result of similar situations involving the nearly-transparent involvement of the really large hosting and caching sites along the backbone of the net.


You can see this type behavior when checking the current scores of live sports events or really active bidding on Ebay.

I worry a lot when I see things happen I can't yet explain. In this particular case, I don't see anything to worry further about.


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