The difference between "cloud server" and "traditional server"

Cloud Server Introduction

VPS is a server virtualization technology, is the use of virtual software kvm/xenserver/vmware and so on a single server virtual out of a number of similar independent server parts, each part can do a separate operating system, management method and the same server. There is a single point of failure, the expansion complexity.

The cloud server is a group of clustered servers virtual on a number of similar independent servers, each server in the cluster has a mirror of the cloud server, which greatly improves the security stability of the virtual server, unless all the servers in the cluster have problems, the cloud server will not be accessible. such as

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Traditional server Introduction

Traditional server is a separate CPU, memory, hard disk, storage data security is not high, hard disk waste rate is relatively high, application has limitations in application, if there are new applications, it can only buy one more, which caused the server serious waste, for some small and medium enterprises is not underestimated.

Comparison of the characteristics of cloud server and traditional server

	Cloud Server	Legacy servers
Technology	Cloud servers use cloud computing technology, and cloud computing technology integrates computing, networking, storage and other software and hardware technologies.	Standalone servers, which are independent, do not integrate these resources.
Security	Cloud servers have natural anti-ARP attacks and Mac spoofing, snapshot backups, and permanent data loss.	Standalone servers do not have the ability to prevent ARP attacks and Mac spoofing, and data loss is difficult to find back.
Reliability	The cloud server is based on the server cluster, so the hardware redundancy is high and the failure rate is low.	Standalone servers are relatively less redundant and have higher failure rates.
Flexibility	Users can use their own flexible hardware resources, online expansion, expandable space is large.	The standalone server cannot use resources flexibly, can only be expanded under the line, the flexibility is poor, and the expandable space is small.
Performance	is 4 times times the equivalent of configuring standalone server computing power to meet the requirements of high performance computing.	The compute power is insufficient compared to the same provisioned cloud service.
Stability	Can fail the automatic migration, if one cloud server is located on the server failure, will be automatically migrated online to other health servers, to ensure business continuity.	System failure can only repair or redo the system, hardware failure can only replace the hardware. Take a long time. Business continuity is not guaranteed.

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The difference between "cloud server" and "traditional server"