What is the relationship between Redis instances?

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The master and slave instances are deployed in pairs. If a master instance is faulty, the remaining master instances in the cluster will select a slave instance to serve as the new master instance. The selection can be performed only when more than half of the master instances are normal. Each Redis cluster in a FusionInsight Farmer environment supports one-to-one mapping between active and slave instances.

Other related questions:
What is the relationship between Redis instances?
The master and slave instances are deployed in pairs. If a master instance is faulty, the remaining master instances in the cluster will select a slave instance to serve as the new master instance. The selection can be performed only when more than half of the master instances are normal. Each Redis cluster in a FusionInsight Farmer environment supports one-to-one mapping between active and slave instances.

Relationship between the Elk database and HD
Elk is an SQL on Hadoop solution. It is a component of HD and provides excellent SQL query performance and compatibility on HD.

What is the relationship between WMM and 802.11e
802.11e defines Quality of Service (QoS) for the wireless LAN, which provides the required service quality for voice and multimedia applications and enhances network performance. Wi-Fi Multimedia (WMM) defines four access categories, including voice, video, best effort, and background to optimize network communication quality and ensure stable access of corresponding applications to network resources. The WMM standard is a subset of IEEE 802.11e.

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