On Mar 7, 2014, at 22:12, alma wrote: > Having thought through the proposed architecture I realized that independent > auctions will end up blocking each other due to the single-threaded nature of > Node JS and the databases. For example, consider that there are two live > auctions; Auction A and Auction B. If a user submits a bid in Auction A, > whilst this bid is being processed by the server another user is essentially > blocked from submitting a bid in Auction B. This is not ideal as the two > auctions are completely independent of each other and do not share any state. > As the site hosts more concurrent auctions this delay will increase.
Such delay will only be the fraction of a second it takes to start processing the web request. In the likely event that your request involves database transactions or any other asynchronous data gathering, control will be returned to the libuv event loop while the data gathering occurs, freeing up the event loop to handle other web requests. I really don't think the problem you're envisioning will be a problem for you at all. > Is there any way that I can architect the application so that this is not the > case and that multiple auctions can run in a truly concurrent fashion? Use a multiple-core server computer and run multiple copies of your node application via the built-in cluster module or other similar method, or even run multiple copies of the node application on multiple physical servers. All these copies of the node application can connect to the same database server. If performance becomes a problem, the database server could be on its own physical server, or be distributed among multiple physical servers. In short, you'd plan to scale your node web servers, and your database servers, separately, as needed. -- -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
