Drop Down MenusCSS Drop Down MenuPure CSS Dropdown Menu

9. Multi-master conflicts

In multi-master use of BDR writes to the same or related table(s) from multiple different nodes can result in data conflicts.
Some clustering systems use distributed lock mechanisms to prevent concurrent access to data. These can perform reasonably when servers are very close but cannot support geographically distributed applications as very low latency is critical for acceptable performance.
Distributed locking is essentially a pessimistic approach, whereas BDR advocates an optimistic approach: avoid conflicts where possible but allow some types of conflict to occur and and resolve them when they arise.


Popular posts from this blog

Oracle Flashback

How to find the server is whether standby (slave) or primary(master) in Postgresql replication ?

How to Get Table Size, Database Size, Indexes Size, schema Size, Tablespace Size, column Size in PostgreSQL Database

How to Return a Result Set from a PostgreSQL Stored Procedure

7 Steps to configure BDR replication in postgresql