Is nginx / node.js / postgres a very scalable architecture?

Posted by Luc on Stack Overflow See other posts from Stack Overflow or by Luc
Published on 2011-11-17T13:20:28Z Indexed on 2011/11/18 1:50 UTC
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Filed under:

postgresql

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node.js

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nginx

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scalability

I have an app running with:

one instance of nginx as the frontend (serving static file)
a cluster of node.js application for the backend (using cluster and expressjs modules)
one instance of Postgres as the DB

Is this architecture sufficient if the application needs scalability (this is only for HTTP / REST requests) for:

500 request per seconds (each requests only fetches data from the DB, those data could be several ko, and with no big computation needed after the fetch).
20000 users connected at the same time

Where could be the bottlenecks ?

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