Service Resilience

HSS uses a four-level reliability architecture. It provides inspection, resistance, and recovery capabilities to help you manually or automatically recover services, enhancing data durability and reliability.

**Table 1** Reliability architecture
Category	Capability	Description	Type
Inspection	Situation Awareness (SA)	HSS interconnects with SA and evaluates asset risks based on alarms, vulnerabilities, and baseline check results.	System
Inspection	Cloud Eye	With Cloud Eye, you can understand the resource usage and status of HSS, receive alarm notifications in a timely manner, and react to changes to keep your services run smoothly.	System
Resistance	Attack prevention	The agent provides self-protection, anti-removal, and anti-tamper capabilities.	Security
	Data backup	All key data can be backed up. Even if the database is completely damaged, services can be restored using the backup data.	System
	Service self-protection	HSS consists of microservices, which are independently deployed, started, and stopped. The agent strictly controls its resource usage. If its resource usage exceeds the threshold, the agent is isolated or a bypassing operation is performed to avoid affecting user workloads. If system resources are insufficient, the agent performance will be degraded.	System
Restoration	System restoration	A VM or service can be manually or automatically rebuilt if it is faulty.	System
Restoration	Process protection	If a process exits, the process will be automatically started to facilitate service recovery.	System