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by hyc_symas
3319 days ago
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You have it right. In practice, nobody has wanted support for this so it has remained unimplemented. Note that if your data items are large enough (more than 1/2 a page) they'll go into their own overflow pages, and then won't shift around at all. (But if you delete/modify a value, the new version will of course be in a new overflow page.) Granted, this could be a case of "if you build it they will come" - before LMDB existed, nobody cared about mmap'd transactional DBs either. And personally, I still see good use cases for it. |
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