Databases
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    <p>Apache-2.4.x has mod_dbd, which can talk to various database back-ends (using precompiled queries for speed) straight out of Apache config-files. This can be used in, for example, <a href="http://httpd.apache.org/docs/2.4/mod/mod_rewrite.html#rewritemap" rel="nofollow">mod_rewrite's rules</a> to alter incoming requests depending on results of the queries.</p> <p>In other words, depending on the details of your application, you may be able to avoid coding altogether.</p> <p>If you do have to write code, however, I'd suggest you first implement the prototype in a language you know best. There is a good chance, it will be "fast enough" -- or that the bulk of the time spent per request will be on the database side making the choice of the language irrelevant.</p> <p>Connecting to a database back-end from C is easy -- each database vendor has (at least one) client-library implementation for C-programs.</p> <p>If your app does not require multiple HTTP-servers to talk to the same (single) database, then your best DB would be a local one: SleepyCat's (now Oracle's) "db", gdbm, or SQLite3. </p> <p>Also, if the updates (changes to the database) are infrequent, you can use flat-files and build the database in memory... This will limit the database's maximum size, but will be the fastest and allow you avoid handling (re)connections, etc.</p> <p>EDIT: memcache is an external database -- whether it is running on the same system or a remote one, you have to <em>connect</em> to it, <em>talk</em> to it, and <em>copy</em> data from its memory into yours. If database-changes aren't frequent, you are better off keeping stuff in your own memory and using it straight from there.</p>
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    1. POUltra-fast database access for web applications - SQL or NoSQL, Interpreted PHP or Compiled C?
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    1. USMikhail T.
    1. USMikhail T.
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    1. COThanks a lot, I'll work myself through the solutions you mentioned. Using precompiled queries without using a full programming language at all looks pretty interesting.
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      1. USDavid
    2. COFor in-memory DB's with persistent storage Redis may fit the bill as well. It's kind-of like Memcached - an "in-memory" key-value storage cache but it allows you to specify some advanced datatypes as values (arrays pointing to other Redis stored values and the like). It keeps a binary log in case you reboot the server you don't need to do a cache warming, it wasn't designed to read/write from the disk.
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      1. USMihai Stancu
    3. CO"At least one client library" is pretty much an understatement. All fast running "high performance", "mission critical" pieces of software were written in C sometimes with a pinch of Assembler here and there. And therefore all of their clients are initially written in C. PHP's MySQL client is just a wrapper over the C client.
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      1. USMihai Stancu
 

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