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MVCC stands for Multi-version Concurrency Control. MVCC allows reading the database without locking.
* Fully ACID complient:
This means that transactionally safe, and able to handle multiple concurrent transactions.
* Row-level locking:
When updating, PBXT uses row-level locking. Row-level locking is also used during SELECT FOR UPDATE.
* Fast Rollback and Recovery:
PBXT uses a specialized method to identify garbage which makes "undo" unncessary. This make both rollback of transactions and recovery after restart very fast.
* Deadlock Detection:
PBXT identifies all kinds of deadlocks immediately.
* Write-once:
PBXT uses a log-based storage which makes it possible to write transactional data directly to the database, without first being writen to the transaction log.
* Referential Integrity:
PBXT supports foreign key definitions, including cascaded updates and deletes.
* BLOB streaming:
In combination with the BLOB Streaming engine PBXT can stream binary and media directly in and out of the database.
可惜看不懂,现在还用V 4.1.21-community-nt