JWT allows a way to not have to check a central DB for every request to say an API. Albeit not w/o drawbacks as covered by this piece. So instead of -- 1) receive request, 2) look up user's session for info and to determine if it's valid, 3) serve user request -- with JWT you can eliminate step 2.
As the author describes for most small and medium sites, validating a request against a central session store is really not that onerous. It's only when you get into Netflix territory - then you have to worry about how to distribute all that state where it's always available and accurate in real time for any service that needs to authenticate the user.
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JWT allows a way to not have to check a central DB for every request to say an API. Albeit not w/o drawbacks as covered by this piece. So instead of -- 1) receive request, 2) look up user's session for info and to determine if it's valid, 3) serve user request -- with JWT you can eliminate step 2.
As the author describes for most small and medium sites, validating a request against a central session store is really not that onerous. It's only when you get into Netflix territory - then you have to worry about how to distribute all that state where it's always available and accurate in real time for any service that needs to authenticate the user.