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ZODB v5.0.0.a1 Release Notes

Release Date: 2016-06-20 // almost 8 years ago

  • Major internal implementation changes to the Multi Version Concurrency Control (MVCC) implementation:

    • For storages that implement IMVCCStorage (RelStorage), no longer implement MVCC in ZODB.

    • For other storages, MVCC is implemented using an additional storage layer. This underlying layer works by calling loadBefore. The low-level storage load method isn't used any more.

    This change allows server-based storages like ZEO and NEO to be implemented more simply and cleanly.