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您可以同时对SQLite数据库进行多次读/写吗？

[英]Can you have multiple read/writes to SQLite database simultaneously?

原文 2016-08-26 05:05:33 5 2 python/ multithreading/ sqlite

I am using Python with SQLite currently and wondering if it is safe to have multiple threads reading and writing to the database simultaneously. 我目前正在将Python与SQLite一起使用，并想知道让多个线程同时读取和写入数据库是否安全。 Does SQLite handle data coming in as a queue or have sort of mechanism that will stop the data from getting corrupt? SQLite是否处理作为队列进入的数据，或具有某种机制来阻止数据损坏？

2 个解决方案

This is my issue too. 这也是我的问题。 SQLite using some kind of locking mechanism which prevent you doing concurrency operation on a DB. SQLite使用某种锁定机制，防止您在数据库上进行并发操作。 But here is a trick which i use when my db are small. 但是，这是我的数据库很小时使用的一个技巧。 You can select all your tables data into memory and operate on it and then update the original table. 您可以将所有表数据选择到内存中并对其进行操作，然后更新原始表。

As i said this is just a trick and it does not always solve the problem. 就像我说的那样，这只是一个把戏，并不总是能解决问题。

I advise to create your trick. 我建议创造你的把戏。

SQLite has a number of robust locking mechanisms to ensure the data doesn't get corrupted, but the problem with that is if you have a number of threads reading and writing to it simultaneously you'll suffer pretty badly in terms of performance as they all trip over the others. SQLite具有许多健壮的锁定机制来确保数据不会被破坏，但是这样做的问题是，如果同时有多个线程对其进行读写操作，那么在性能方面，它们将遭受非常严重的影响。绊倒其他人。 It's not intended to be used this way, even if it does work. 即使它确实起作用，也不打算以这种方式使用。

You probably want to look at using a shared database server of some sort if this is your intended usage pattern. 如果这是您的预期使用模式，则可能要考虑使用某种共享数据库服务器。 They have much better support for concurrent operations. 他们对并发操作有更好的支持。