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POHow to make sqlite robust over a Windows shared drive
 

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  1. POHow to make sqlite robust over a Windows shared drive
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    <p>I know it is not recommend to use Sqlite over a network drive, for two reasons: performance, and data corruption due to bad implementation of network file systems.</p> <p>Still, I'd like to explore the possibility of using Sqlite to support a multi-user application with a central database. We already support Sqlite on a single-user machine and several database servers (Oracle, PostgreSQL) for multi-user setups. Using Sqlite for multi-user setup would be convenient to allow lightweight installations on existing IT infrastructures with Windows shared drives (SMB).</p> <p>We don't care too much about performance, so we are ready to pay the price needed to avoid corruption. Quoting <a href="http://www.sqlite.org/atomiccommit.html">http://www.sqlite.org/atomiccommit.html</a>, section 9.1:</p> <blockquote> <p>But if you must use a network filesystem to store SQLite database files, consider using a secondary locking mechanism to prevent simultaneous writes to the same database even if the native filesystem locking mechanism malfunctions.</p> </blockquote> <p>I'm looking on hints and advices to implement such a mechanism, or, more generally, on tips to avoid problems with Sqlite over a Windows shared drive.</p> <p>For instance, I'm considering the following brain-dead approach to locking: before any (non read-only) SQLite query, try to create an empty file on the same shared folder and keep it open until the end of the query; normally, any other Windows process trying to create a file with the same name while it's still open would block or fail. Would that work? Anything better?</p>
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    1. COSQLite is not a replacement for a database server.
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      1. USDan D.
    2. COI know that, and as I said, we already support several kinds of database servers for our application. We sell a business application; our users always have shared drives readily available, but having to rely on their IT and DBA teams to create and administrate, say, an Oracle instance for a small setup with 2-10 users is hugely expensive for them. We're just looking for something more lightweight to simplify deployment (for testing or even production).
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