Compare a typical Distributed Replicated Block Device (DRBD) with MySQL Standard Replication using master-slave replication. Which two statements are correct?
A.
Both technologies use the TCP/IP stack as their primary transmission medium.
B.
DRBD uses shared-disk technology.
C.
Both technologies guarantee an identical copy of data on the secondary node.
D.
Only MySQL can maintain a time-delayed copy of data on the secondary node.
Suggested Answer:AD🗳️
A: * Replication cannot use Unix socket files. You must be able to connect to the master MySQL server using TCP/IP. D: Time Delayed replication is however something quite helpful for some environments. Though DRBD also could be extended to support one if needed. Not B: DRBD (Distributed Replication Block Device), one of the leading solutions for MySQL HA (High Availability), offering users: / An end-to-end, integrated stack of mature and proven open source technologies, fully supported by Oracle; / Automatic failover and recovery for service continuity; / Mirroring, via synchronous replication, to ensure failover between nodes without the risk of losing committed transactions; / Building of HA clusters from commodity hardware, without the requirement for shared-storage.
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