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POUltra-fast database access for web applications - SQL or NoSQL, Interpreted PHP or Compiled C?
 

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  1. POUltra-fast database access for web applications - SQL or NoSQL, Interpreted PHP or Compiled C?
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    <p>I'm currently building a web application that needs to access a (really) big database of strings and compare them to a given 'request string' - This has to be done over and over again using different comparison methods (number of identical words, order of words...) and should be scalable and, more important, fast.</p> <p>I thought about about implementing the comparison method itself in <strong>C</strong>, because it's obviously much faster than interpreted, though more 'webby' languages like PHP. This brought me to three questions:</p> <p>1) How am I supposed to <strong>'connect' the C application to the web server</strong> (currently Apache)? I thought about the usual CGI-way, but because of its need to create one new process per request it would be less scalable and fast - at least that's what I read about it.</p> <p>2) Which <strong>database technology</strong> is best to use with C for this use-case?</p> <p>3) Last but not least, do you think it's <strong>worth the struggle</strong> or would it be enough to go the usual way by building a PHP-Script that connects to a MySQL database - how big is the <strong>speed difference</strong>?</p> <p>Thanks in advance, David</p>
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    1. COCould you give us some concrete(ish) numbers about what you mean by "a (really) big database of strings"? And also how many different search permutations need to be run against each query-string?
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    2. COCertainly a few million sentence-long strings, probably tens-of-millions.
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    3. COConsider keeping the entire list of strings in memory (about 1 gigabyte if my math is accurate) and foregoing a database except to persist the list when the server is down. You don't define "fast", but if speed is at issue, and various complex string comparisons are needed, a disk-based database probably won't cut it.
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      1. USLarry Lustig
 

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